{"id": "GLSA-201607-12", "lastseen": "2016-09-06T19:46:30", "viewCount": 4, "bulletinFamily": "unix", "cvss": {"vector": "AV:LOCAL/AC:LOW/Au:NONE/C:PARTIAL/I:PARTIAL/A:PARTIAL/", "score": 4.6}, "edition": 1, "enchantments": {"score": {"value": 5.8, "vector": "NONE", "modified": "2016-09-06T19:46:30", "rev": 2}, "dependencies": {"references": [{"type": "cve", "idList": ["CVE-2014-2972"]}, {"type": "openvas", "idList": ["OPENVAS:1361412562310868048", "OPENVAS:1361412562310120245", "OPENVAS:1361412562310842695", "OPENVAS:1361412562310868054"]}, {"type": "amazon", "idList": ["ALAS-2014-395"]}, {"type": "nessus", "idList": ["GENTOO_GLSA-201607-12.NASL", "EXIM_4_83.NASL", "FEDORA_2014-8865.NASL", "FEDORA_2014-8803.NASL", "ALA_ALAS-2014-395.NASL", "UBUNTU_USN-2933-1.NASL", "OPENSUSE-2014-482.NASL"]}, {"type": "fedora", "idList": ["FEDORA:74FDA22704", "FEDORA:2442D225E0"]}, {"type": "ubuntu", "idList": ["USN-2933-1"]}], "modified": "2016-09-06T19:46:30", "rev": 2}, "vulnersScore": 5.8}, "type": "gentoo", "affectedPackage": [{"arch": "all", "packageFilename": "UNKNOWN", "OSVersion": "any", "operator": "lt", "packageName": "mail-mta/exim", "packageVersion": "4.87", "OS": "Gentoo"}], "description": "### Background\n\nExim is a message transfer agent (MTA) designed to be a a highly configurable, drop-in replacement for sendmail. \n\n### Description\n\nVulnerabilities have been discovered in Exim\u2019s implementation of set-uid root and when using \u2018perl_startup\u2019. These vulnerabilities require a user account on the Exim server and a configuration that does lookups against files to which the user has edit access. \n\n### Impact\n\nA local attacker could possibly execute arbitrary code with the privileges of the process, or escalate privileges. \n\n### Workaround\n\nThere is no known workaround at this time.\n\n### Resolution\n\nAll Exim users should upgrade to the latest version:\n \n \n # emerge --sync\n # emerge --ask --oneshot --verbose \">=mail-mta/exim-4.87\"", "title": "Exim: Arbitrary code execution", "cvelist": ["CVE-2014-2972"], "published": "2016-07-20T00:00:00", "references": ["https://bugs.gentoo.org/show_bug.cgi?id=517934", "http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-2972", "https://bugs.gentoo.org/show_bug.cgi?id=576582"], "reporter": "Gentoo Foundation", "modified": "2016-07-20T00:00:00", "href": "https://security.gentoo.org/glsa/201607-12"}

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(Only plugin which currently uses this is\n kerberos4, which nobody should be using, but we should\n make it available and other future plugins might\n conceivably use it, even though it would break NAT;\n stuff *should* be using channel bindings instead).\n\n - Handle 'exim -L <tag>' to indicate to use syslog with\n tag as the process name; added for Sendmail\n compatibility; requires admin caller. Handle -G as\n equivalent to 'control = suppress_local_fixups' (we used\n to just ignore it); requires trusted caller. Also parse\n but ignore: -Ac -Am -X<logfile> Bugzilla 1117.\n\n - Bugzilla 1258 - Refactor MAIL FROM optional args\n processing.\n\n - Add +smtp_confirmation as a default logging option.\n\n - Bugzilla 198 - Implement remove_header ACL modifier.\n\n - Bugzilla 1197, 1281, 1283 - Spec typo.\n\n - Bugzilla 1290 - Spec grammar fixes.\n\n - Bugzilla 1285 - Spec omission, fix docbook errors for\n spec.txt creation.\n\n - Add Experimental DMARC support using libopendmarc\n libraries.\n\n - Fix an out of order global option causing a segfault.\n Reported to dev mailing list by by Dmitry Isaikin.\n\n - Bugzilla 1201 & 304 - New cutthrough-delivery feature,\n with TLS support.\n\n - Support 'G' suffix to numbers in $(if comparisons.\n\n - Handle smtp transport tls_sni option forced-fail for\n OpenSSL.\n\n - Bugzilla 1196 - Spec examples corrections\n\n - Add expansion operators $(listnamed:name) and\n $(listcount:string)\n\n - Add gnutls_allow_auto_pkcs11 option (was originally\n called gnutls_enable_pkcs11, but renamed to more\n accurately indicate its function.\n\n - Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC. Pulled\n from Debian 30_dontoverridecflags.dpatch by Andreas\n Metzler.\n\n - Add expansion item $(acl (name)(arg)...), expansion\n condition 'acl ((name)(arg)...)', and optional args on\n acl condition 'acl = name arg...'\n\n - Permit multiple router/transport headers_add/remove\n lines.\n\n - Add dnsdb pseudo-lookup 'a+' to do an 'aaaa' + 'a'\n combination.\n\n - Avoid using a waiting database for a single-message-only\n transport. Performance patch from Paul Fisher. Bugzilla\n 1262.\n\n - Strip leading/trailing newlines from add_header ACL\n modifier data. Bugzilla 884.\n\n - Add $headers_added variable, with content from use of\n ACL modifier add_header (but not yet added to the\n message). Bugzilla 199.\n\n - Add 8bitmime log_selector, for 8bitmime status on the\n received line. Pulled from Bugzilla 817 by Wolfgang\n Breyha.\n\n - SECURITY: protect DKIM DNS decoding from remote exploit.\n CVE-2012-5671 (nb: this is the same fix as in Exim\n 4.80.1)\n\n - Add A= logging on delivery lines, and a client_set_id\n option on authenticators.\n\n - Add optional authenticated_sender logging to A= and a\n log_selector for control.\n\n - Unbreak server_set_id for NTLM/SPA auth, broken by 4.80\n PP/29.\n\n - Dovecot auth: log better reason to rejectlog if Dovecot\n did not advertise SMTP AUTH mechanism to us, instead of\n a generic protocol violation error. Also, make Exim more\n robust to bad data from the Dovecot auth socket.\n\n - Fix ultimate retry timeouts for intermittently\n deliverable recipients.\n\n - When a queue runner is handling a message, Exim first\n routes the recipient addresses, during which it prunes\n them based on the retry hints database. After that it\n attempts to deliver the message to any remaining\n recipients. It then updates the hints database using the\n retry rules.\n\n - So if a recipient address works intermittently, it can\n get repeatedly deferred at routing time. The retry hints\n record remains fresh so the address never reaches the\n final cutoff time.\n\n - This is a fairly common occurrence when a user is\n bumping up against their storage quota. Exim had some\n logic in its local delivery code to deal with this.\n However it did not apply to per-recipient defers in\n remote deliveries, e.g. over LMTP to a separate IMAP\n message store.\n\n - This change adds a proper retry rule check during\n routing so that the final cutoff time is checked against\n the message's age. We only do this check if there is an\n address retry record and there is not a domain retry\n record; this implies that previous attempts to handle\n the address had the retry_use_local_parts option turned\n on. We use this as an approximation for the destination\n being like a local delivery, as in LMTP.\n\n - I suspect this new check makes the old local delivery\n cutoff check redundant, but I have not verified this so\n I left the code in place.\n\n - Correct gecos expansion when From: is a prefix of the\n username.\n\n - Test 0254 submits a message to Exim with the header &#9;\n Resent-From: f\n\n - When I ran the test suite under the user fanf2, Exim\n expanded the header to contain my full name, whereas it\n should have added a Resent-Sender: header. It\n erroneously treats any prefix of the username as equal\n to the username. This change corrects that bug.\n\n - DCC debug and logging tidyup Error conditions log to\n paniclog rather than rejectlog. Debug lines prefixed by\n 'DCC: ' to remove any ambiguity.\n\n - Avoid unnecessary rebuilds of lookup-related code.\n\n - Fix OCSP reinitialisation in SNI handling for Exim/TLS\n as server. Bug spotted by Jeremy Harris; was flawed\n since initial commit. Would have resulted in OCSP\n responses post-SNI triggering an Exim NULL dereference\n and crash.\n\n - Add $router_name and $transport_name variables. Bugzilla\n 308.\n\n - Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd. Bug\n detection, analysis and fix by Samuel Thibault. Bugzilla\n 1331, Debian bug #698092.\n\n - Update eximstats to watch out for senders sending 'HELO\n [IpAddr]'\n\n - SMTP PRDR\n (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt\n ). Server implementation by Todd Lyons, client by JH.\n Only enabled when compiled with EXPERIMENTAL_PRDR. A new\n config variable 'prdr_enable' controls whether the\n server advertises the facility. If the client requests\n PRDR a new acl_data_smtp_prdr ACL is called once for\n each recipient, after the body content is received and\n before the acl_smtp_data ACL. The client is controlled\n by bolth of: a hosts_try_prdr option on the smtp\n transport, and the server advertisement. Default client\n logging of deliveries and rejections involving PRDR are\n flagged with the string 'PRDR'.\n\n - Fix problems caused by timeouts during quit ACLs trying\n to double fclose(). Diagnosis by Todd Lyons. Update\n configure.default to handle IPv6 localhost better. Patch\n by Alain Williams (plus minor tweaks). Bugzilla 880.\n\n - OpenSSL made graceful with empty tls_verify_certificates\n setting. This is now consistent with GnuTLS, and is now\n documented: the previous undocumented portable approach\n to treating the option as unset was to force an\n expansion failure. That still works, and an empty string\n is now equivalent.\n\n - Renamed DNSSEC-enabling option to 'dns_dnssec_ok', to\n make it clearer that Exim is using the DO (DNSSEC OK)\n EDNS0 resolver flag, not performing validation itself.\n\n - Added force_command boolean option to pipe transport.\n Patch from Nick Koston, of cPanel Inc.\n\n - AUTH support on callouts (and hence\n cutthrough-deliveries). Bugzilla 321, 823.\n\n - Added udpsend ACL modifer and hexquote expansion\n operator\n\n - Fix eximon continuous updating with timestamped\n log-files. Broken in a format-string cleanup in 4.80,\n missed when I repaired the other false fix of the same\n issue. Report and fix from Heiko Schlichting. Bugzilla\n 1363.\n\n - Guard LDAP TLS usage against Solaris LDAP variant.\n Report from Prashanth Katuri.\n\n - Support safari_ecdhe_ecdsa_bug for openssl_options. It's\n SecureTransport, so affects any MacOS clients which use\n the system-integrated TLS libraries, including email\n clients.\n\n - Fix segfault from trying to fprintf() to a NULL stdio\n FILE* if using a MIME ACL for non-SMTP local injection.\n Report and assistance in diagnosis by Warren Baker.\n\n - Adjust exiqgrep to be case-insensitive for\n sender/receiver.\n\n - Fix comparisons for 64b. Bugzilla 1385.\n\n - Add expansion variable $authenticated_fail_id to keep\n track of last id that failed so it may be referenced in\n subsequent ACL's.\n\n - Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch\n provided by Alexander Miroch.\n\n - Bugzilla 1382 - Option ldap_require_cert overrides\n start_tls ldap library initialization, allowing\n self-signed CA's to be used. Also properly sets\n require_cert option later in code by using NULL (global\n ldap config) instead of ldap handle (per session). Bug\n diagnosis and testing by alxgomz.\n\n - Enhanced documentation in the ratelimit.pl script\n provided in the src/util/ subdirectory.\n\n - Bug 1301 - Imported transport SQL logging patch from\n Axel Rau renamed to Transport Post Delivery Action by\n Jeremy Harris, as EXPERIMENTAL_TPDA.\n\n - Bugzilla 1217 - Redis lookup support has been added. It\n is only enabled when Exim is compiled with\n EXPERIMENTAL_REDIS. A new config variable redis_servers\n = needs to be configured which will be used by the redis\n lookup. Patch from Warren Baker, of The Packet Hub.\n\n - Fix exiqsumm summary for corner case. Patch provided by\n Richard Hall.\n\n - Bugzilla 1289 - Clarify host/ip processing when have\n errors looking up a hostname or reverse DNS when\n processing a host list. Used suggestions from multiple\n comments on this bug.\n\n - Bugzilla 1057 - Multiple clamd TCP targets patch from\n Mark Zealey.\n\n - Had previously added a -CONTINUE option to runtest in\n the test suite. Missed a few lines, added it to make the\n runtest require no keyboard interaction.\n\n - Bugzilla 1402 - Test 533 fails if any part of the path\n to the test suite contains upper case chars. Make router\n use caseful_local_part.\n\n - Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option.\n Allows GnuTLS support when GnuTLS has been built with\n p11-kit.\n\n - Add systemd support for openSUSE > 12.2\n\n - Remove some obsolete conditionnal macros\n\n - exim.spec forces the use of SSL libraries, so make sure\n the BuildRequires are there. 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(Only plugin which currently uses this is\n kerberos4, which nobody should be using, but we should\n make it available and other future plugins might\n conceivably use it, even though it would break NAT;\n stuff *should* be using channel bindings instead).\n\n - Handle 'exim -L <tag>' to indicate to use syslog with\n tag as the process name; added for Sendmail\n compatibility; requires admin caller. Handle -G as\n equivalent to 'control = suppress_local_fixups' (we used\n to just ignore it); requires trusted caller. Also parse\n but ignore: -Ac -Am -X<logfile> Bugzilla 1117.\n\n - Bugzilla 1258 - Refactor MAIL FROM optional args\n processing.\n\n - Add +smtp_confirmation as a default logging option.\n\n - Bugzilla 198 - Implement remove_header ACL modifier.\n\n - Bugzilla 1197, 1281, 1283 - Spec typo.\n\n - Bugzilla 1290 - Spec grammar fixes.\n\n - Bugzilla 1285 - Spec omission, fix docbook errors for\n spec.txt creation.\n\n - Add Experimental DMARC support using libopendmarc\n libraries.\n\n - Fix an out of order global option causing a segfault.\n Reported to dev mailing list by by Dmitry Isaikin.\n\n - Bugzilla 1201 & 304 - New cutthrough-delivery feature,\n with TLS support.\n\n - Support 'G' suffix to numbers in $(if comparisons.\n\n - Handle smtp transport tls_sni option forced-fail for\n OpenSSL.\n\n - Bugzilla 1196 - Spec examples corrections\n\n - Add expansion operators $(listnamed:name) and\n $(listcount:string)\n\n - Add gnutls_allow_auto_pkcs11 option (was originally\n called gnutls_enable_pkcs11, but renamed to more\n accurately indicate its function.\n\n - Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC. Pulled\n from Debian 30_dontoverridecflags.dpatch by Andreas\n Metzler.\n\n - Add expansion item $(acl (name)(arg)...), expansion\n condition 'acl ((name)(arg)...)', and optional args on\n acl condition 'acl = name arg...'\n\n - Permit multiple router/transport headers_add/remove\n lines.\n\n - Add dnsdb pseudo-lookup 'a+' to do an 'aaaa' + 'a'\n combination.\n\n - Avoid using a waiting database for a single-message-only\n transport. Performance patch from Paul Fisher. Bugzilla\n 1262.\n\n - Strip leading/trailing newlines from add_header ACL\n modifier data. Bugzilla 884.\n\n - Add $headers_added variable, with content from use of\n ACL modifier add_header (but not yet added to the\n message). Bugzilla 199.\n\n - Add 8bitmime log_selector, for 8bitmime status on the\n received line. Pulled from Bugzilla 817 by Wolfgang\n Breyha.\n\n - SECURITY: protect DKIM DNS decoding from remote exploit.\n CVE-2012-5671 (nb: this is the same fix as in Exim\n 4.80.1)\n\n - Add A= logging on delivery lines, and a client_set_id\n option on authenticators.\n\n - Add optional authenticated_sender logging to A= and a\n log_selector for control.\n\n - Unbreak server_set_id for NTLM/SPA auth, broken by 4.80\n PP/29.\n\n - Dovecot auth: log better reason to rejectlog if Dovecot\n did not advertise SMTP AUTH mechanism to us, instead of\n a generic protocol violation error. Also, make Exim more\n robust to bad data from the Dovecot auth socket.\n\n - Fix ultimate retry timeouts for intermittently\n deliverable recipients.\n\n - When a queue runner is handling a message, Exim first\n routes the recipient addresses, during which it prunes\n them based on the retry hints database. After that it\n attempts to deliver the message to any remaining\n recipients. It then updates the hints database using the\n retry rules.\n\n - So if a recipient address works intermittently, it can\n get repeatedly deferred at routing time. The retry hints\n record remains fresh so the address never reaches the\n final cutoff time.\n\n - This is a fairly common occurrence when a user is\n bumping up against their storage quota. Exim had some\n logic in its local delivery code to deal with this.\n However it did not apply to per-recipient defers in\n remote deliveries, e.g. over LMTP to a separate IMAP\n message store.\n\n - This change adds a proper retry rule check during\n routing so that the final cutoff time is checked against\n the message's age. We only do this check if there is an\n address retry record and there is not a domain retry\n record; this implies that previous attempts to handle\n the address had the retry_use_local_parts option turned\n on. We use this as an approximation for the destination\n being like a local delivery, as in LMTP.\n\n - I suspect this new check makes the old local delivery\n cutoff check redundant, but I have not verified this so\n I left the code in place.\n\n - Correct gecos expansion when From: is a prefix of the\n username.\n\n - Test 0254 submits a message to Exim with the header &#9;\n Resent-From: f\n\n - When I ran the test suite under the user fanf2, Exim\n expanded the header to contain my full name, whereas it\n should have added a Resent-Sender: header. It\n erroneously treats any prefix of the username as equal\n to the username. This change corrects that bug.\n\n - DCC debug and logging tidyup Error conditions log to\n paniclog rather than rejectlog. Debug lines prefixed by\n 'DCC: ' to remove any ambiguity.\n\n - Avoid unnecessary rebuilds of lookup-related code.\n\n - Fix OCSP reinitialisation in SNI handling for Exim/TLS\n as server. Bug spotted by Jeremy Harris; was flawed\n since initial commit. Would have resulted in OCSP\n responses post-SNI triggering an Exim NULL dereference\n and crash.\n\n - Add $router_name and $transport_name variables. Bugzilla\n 308.\n\n - Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd. Bug\n detection, analysis and fix by Samuel Thibault. Bugzilla\n 1331, Debian bug #698092.\n\n - Update eximstats to watch out for senders sending 'HELO\n [IpAddr]'\n\n - SMTP PRDR\n (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt\n ). Server implementation by Todd Lyons, client by JH.\n Only enabled when compiled with EXPERIMENTAL_PRDR. A new\n config variable 'prdr_enable' controls whether the\n server advertises the facility. If the client requests\n PRDR a new acl_data_smtp_prdr ACL is called once for\n each recipient, after the body content is received and\n before the acl_smtp_data ACL. The client is controlled\n by bolth of: a hosts_try_prdr option on the smtp\n transport, and the server advertisement. Default client\n logging of deliveries and rejections involving PRDR are\n flagged with the string 'PRDR'.\n\n - Fix problems caused by timeouts during quit ACLs trying\n to double fclose(). Diagnosis by Todd Lyons. Update\n configure.default to handle IPv6 localhost better. Patch\n by Alain Williams (plus minor tweaks). Bugzilla 880.\n\n - OpenSSL made graceful with empty tls_verify_certificates\n setting. This is now consistent with GnuTLS, and is now\n documented: the previous undocumented portable approach\n to treating the option as unset was to force an\n expansion failure. That still works, and an empty string\n is now equivalent.\n\n - Renamed DNSSEC-enabling option to 'dns_dnssec_ok', to\n make it clearer that Exim is using the DO (DNSSEC OK)\n EDNS0 resolver flag, not performing validation itself.\n\n - Added force_command boolean option to pipe transport.\n Patch from Nick Koston, of cPanel Inc.\n\n - AUTH support on callouts (and hence\n cutthrough-deliveries). Bugzilla 321, 823.\n\n - Added udpsend ACL modifer and hexquote expansion\n operator\n\n - Fix eximon continuous updating with timestamped\n log-files. Broken in a format-string cleanup in 4.80,\n missed when I repaired the other false fix of the same\n issue. Report and fix from Heiko Schlichting. Bugzilla\n 1363.\n\n - Guard LDAP TLS usage against Solaris LDAP variant.\n Report from Prashanth Katuri.\n\n - Support safari_ecdhe_ecdsa_bug for openssl_options. It's\n SecureTransport, so affects any MacOS clients which use\n the system-integrated TLS libraries, including email\n clients.\n\n - Fix segfault from trying to fprintf() to a NULL stdio\n FILE* if using a MIME ACL for non-SMTP local injection.\n Report and assistance in diagnosis by Warren Baker.\n\n - Adjust exiqgrep to be case-insensitive for\n sender/receiver.\n\n - Fix comparisons for 64b. Bugzilla 1385.\n\n - Add expansion variable $authenticated_fail_id to keep\n track of last id that failed so it may be referenced in\n subsequent ACL's.\n\n - Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch\n provided by Alexander Miroch.\n\n - Bugzilla 1382 - Option ldap_require_cert overrides\n start_tls ldap library initialization, allowing\n self-signed CA's to be used. Also properly sets\n require_cert option later in code by using NULL (global\n ldap config) instead of ldap handle (per session). Bug\n diagnosis and testing by alxgomz.\n\n - Enhanced documentation in the ratelimit.pl script\n provided in the src/util/ subdirectory.\n\n - Bug 1301 - Imported transport SQL logging patch from\n Axel Rau renamed to Transport Post Delivery Action by\n Jeremy Harris, as EXPERIMENTAL_TPDA.\n\n - Bugzilla 1217 - Redis lookup support has been added. It\n is only enabled when Exim is compiled with\n EXPERIMENTAL_REDIS. A new config variable redis_servers\n = needs to be configured which will be used by the redis\n lookup. Patch from Warren Baker, of The Packet Hub.\n\n - Fix exiqsumm summary for corner case. Patch provided by\n Richard Hall.\n\n - Bugzilla 1289 - Clarify host/ip processing when have\n errors looking up a hostname or reverse DNS when\n processing a host list. Used suggestions from multiple\n comments on this bug.\n\n - Bugzilla 1057 - Multiple clamd TCP targets patch from\n Mark Zealey.\n\n - Had previously added a -CONTINUE option to runtest in\n the test suite. Missed a few lines, added it to make the\n runtest require no keyboard interaction.\n\n - Bugzilla 1402 - Test 533 fails if any part of the path\n to the test suite contains upper case chars. Make router\n use caseful_local_part.\n\n - Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option.\n Allows GnuTLS support when GnuTLS has been built with\n p11-kit.\n\n - Add systemd support for openSUSE > 12.2\n\n - Remove some obsolete conditionnal macros\n\n - exim.spec forces the use of SSL libraries, so make sure\n the BuildRequires are there. Also add previously\n implicit cyrus-sasl back.\n\n - Fixed another remote code execution issue (CVE-2011-1407\n / bnc#694798)\n\n - Fixed STARTTLS command injection (bnc#695144)\"\n );\n # http://bugs.exim.org/show_bug.cgi?id=1397\n script_set_attribute(\n attribute:\"see_also\",\n value:\"https://bugs.exim.org/show_bug.cgi?id=1397\"\n );\n script_set_attribute(\n attribute:\"see_also\",\n value:\"http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt\"\n );\n script_set_attribute(\n attribute:\"see_also\",\n value:\"https://bugzilla.novell.com/show_bug.cgi?id=694798\"\n );\n script_set_attribute(\n attribute:\"see_also\",\n value:\"https://bugzilla.novell.com/show_bug.cgi?id=695144\"\n );\n script_set_attribute(\n attribute:\"see_also\",\n value:\"https://bugzilla.novell.com/show_bug.cgi?id=888520\"\n );\n script_set_attribute(\n attribute:\"see_also\",\n value:\"https://lists.opensuse.org/opensuse-updates/2014-08/msg00014.html\"\n );\n script_set_attribute(attribute:\"solution\", 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incorrectly filtered environment variables when \nused with the perl_startup configuration option. If the perl_startup option \nwas enabled, a local attacker could use this issue to escalate their \nprivileges to the root user. This issue has been fixed by having Exim clean \nthe complete execution environment by default on startup, including any \nsubprocesses such as transports that call other programs. This change in \nbehaviour may break existing installations and can be adjusted by using two \nnew configuration options, keep_environment and add_environment. \n(CVE-2016-1531)\n\nPatrick William discovered that Exim incorrectly expanded mathematical \ncomparisons twice. A local attacker could possibly use this issue to \nperform arbitrary file operations as the Exim user. This issue only \naffected Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. (CVE-2014-2972)", "edition": 5, "modified": "2016-03-15T00:00:00", "published": "2016-03-15T00:00:00", "id": "USN-2933-1", "href": "https://ubuntu.com/security/notices/USN-2933-1", "title": "Exim vulnerabilities", "type": "ubuntu", "cvss": {"score": 6.9, "vector": "AV:L/AC:M/Au:N/C:C/I:C/A:C"}}]}