Fedora Update for libvncserver FEDORA-2018-43541091ab
2018-04-04T00:00:00
ID OPENVAS:1361412562310874325 Type openvas Reporter Copyright (C) 2018 Greenbone Networks GmbH Modified 2019-03-15T00:00:00
Description
The remote host is missing an update for the
###############################################################################
# OpenVAS Vulnerability Test
# $Id: gb_fedora_2018_43541091ab_libvncserver_fc26.nasl 14223 2019-03-15 13:49:35Z cfischer $
#
# Fedora Update for libvncserver FEDORA-2018-43541091ab
#
# Authors:
# System Generated Check
#
# Copyright:
# Copyright (C) 2018 Greenbone Networks GmbH, http://www.greenbone.net
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2
# (or any later version), as published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
###############################################################################
if(description)
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script_oid("1.3.6.1.4.1.25623.1.0.874325");
script_version("$Revision: 14223 $");
script_tag(name:"last_modification", value:"$Date: 2019-03-15 14:49:35 +0100 (Fri, 15 Mar 2019) $");
script_tag(name:"creation_date", value:"2018-04-04 08:41:42 +0200 (Wed, 04 Apr 2018)");
script_cve_id("CVE-2018-7225");
script_tag(name:"cvss_base", value:"7.5");
script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:P/A:P");
script_tag(name:"qod_type", value:"package");
script_name("Fedora Update for libvncserver FEDORA-2018-43541091ab");
script_tag(name:"summary", value:"The remote host is missing an update for the 'libvncserver'
package(s) announced via the referenced advisory.");
script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");
script_tag(name:"affected", value:"libvncserver on Fedora 26");
script_tag(name:"solution", value:"Please install the updated package(s).");
script_xref(name:"FEDORA", value:"2018-43541091ab");
script_xref(name:"URL", value:"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZVQ7GPVKJHTS6WQY5HPCCSPQ6PMAM345");
script_tag(name:"solution_type", value:"VendorFix");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2018 Greenbone Networks GmbH");
script_family("Fedora Local Security Checks");
script_dependencies("gather-package-list.nasl");
script_mandatory_keys("ssh/login/fedora", "ssh/login/rpms", re:"ssh/login/release=FC26");
exit(0);
}
include("revisions-lib.inc");
include("pkg-lib-rpm.inc");
release = rpm_get_ssh_release();
if(!release)
exit(0);
res = "";
if(release == "FC26")
{
if ((res = isrpmvuln(pkg:"libvncserver", rpm:"libvncserver~0.9.11~3.fc26", rls:"FC26")) != NULL)
{
security_message(data:res);
exit(0);
}
if (__pkg_match) exit(99);
exit(0);
}
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A \nremote attacker could possibly use this issue to obtain sensitive \ninformation, cause a denial of service, or execute arbitrary code. \n(CVE-2018-7225)\n\nPavel Cheremushkin discovered that an information disclosure vulnerability \nexisted in Vino when sending a ServerCutText message. An attacker could \npossibly use this issue to expose sensitive information. (CVE-2019-15681)\n\nIt was discovered that Vino incorrectly handled region clipping. A remote \nattacker could possibly use this issue to cause Vino to crash, resulting in \na denial of service. (CVE-2020-14397)\n\nIt was discovered that Vino incorrectly handled encodings. A remote \nattacker could use this issue to cause Vino to crash, resulting in a denial \nof service, or possibly execute arbitrary code. (CVE-2020-14402, \nCVE-2020-14403, CVE-2020-14404)", "edition": 1, "modified": "2020-10-07T00:00:00", "published": "2020-10-07T00:00:00", "id": "USN-4573-1", "href": "https://ubuntu.com/security/notices/USN-4573-1", "title": "Vino vulnerabilities", "type": "ubuntu", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2020-09-29T01:09:06", "bulletinFamily": "unix", "cvelist": ["CVE-2018-20022", "CVE-2018-20020", "CVE-2019-15681", "CVE-2018-7225", "CVE-2018-20021", "CVE-2018-15127", "CVE-2018-20750", "CVE-2018-20024", "CVE-2018-20749", "CVE-2018-20019", "CVE-2018-20748", "CVE-2018-20023"], "description": "It was discovered that an information disclosure vulnerability existed in the \nLibVNCServer vendored in iTALC when sending a ServerCutText message. 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A remote attacker could possibly \nuse this issue to obtain sensitive information, cause a denial of service, or \nexecute arbitrary code. \n(CVE-2018-15127 CVE-2018-20019, CVE-2018-20020, CVE-2018-20021, CVE-2018-20022, \nCVE-2018-20023, CVE-2018-20024, CVE-2018-20748, CVE-2018-20749, CVE-2018-20750, \nCVE-2018-7225, CVE-2019-15681)", "edition": 1, "modified": "2020-09-28T00:00:00", "published": "2020-09-28T00:00:00", "id": "USN-4547-1", "href": "https://ubuntu.com/security/notices/USN-4547-1", "title": "iTALC vulnerabilities", "type": "ubuntu", "cvss": {"score": 7.8, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:C"}}, {"lastseen": "2020-10-20T21:12:00", "bulletinFamily": "unix", "cvelist": ["CVE-2018-20022", "CVE-2018-20020", "CVE-2016-9941", "CVE-2019-15681", "CVE-2018-7225", "CVE-2018-20021", "CVE-2018-15127", "CVE-2014-6053", "CVE-2018-20750", "CVE-2018-20024", "CVE-2018-20749", "CVE-2014-6055", "CVE-2014-6052", "CVE-2014-6051", "CVE-2018-20019", "CVE-2016-9942", "CVE-2018-20748", "CVE-2014-6054", "CVE-2018-20023"], "description": "Nicolas Ruff discovered that iTALC had buffer overflows, divide-by-zero errors \nand didn't check malloc return values. A remote attacker could use these issues \nto cause a denial of service or possibly execute arbitrary code. \n(CVE-2014-6051, CVE-2014-6052, CVE-2014-6053, CVE-2014-6054, CVE-2014-6055)\n\nJosef Gajdusek discovered that iTALC had heap-based buffer overflow \nvulnerabilities. A remote attacker could used these issues to cause a denial of \nservice or possibly execute arbitrary code. (CVE-2016-9941, CVE-2016-9942)\n\nIt was discovered that iTALC had an out-of-bounds write, multiple heap \nout-of-bounds writes, an infinite loop, improper initializations, and null \npointer vulnerabilities. A remote attacker could used these issues to cause a \ndenial of service or possibly execute arbitrary code. (CVE-2018-15127, \nCVE-2018-20019, CVE-2018-20020, CVE-2018-20021, CVE-2018-20022, CVE-2018-20023, \nCVE-2018-20024, CVE-2018-20748, CVE-2018-20749, CVE-2018-20750, CVE-2018-7225, \nCVE-2019-15681)", "edition": 1, "modified": "2020-10-20T00:00:00", "published": "2020-10-20T00:00:00", "id": "USN-4587-1", "href": "https://ubuntu.com/security/notices/USN-4587-1", "title": "iTALC vulnerabilities", "type": "ubuntu", "cvss": {"score": 7.8, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:C"}}], "redhat": [{"lastseen": "2019-08-13T18:44:57", "bulletinFamily": "unix", "cvelist": ["CVE-2018-7225"], "description": "LibVNCServer is a C library that enables you to implement VNC server functionality into own programs.\n\nSecurity Fix(es):\n\n* libvncserver: Improper input sanitization in rfbProcessClientNormalMessage in rfbserver.c (CVE-2018-7225)\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.", "modified": "2018-04-10T12:16:44", "published": "2018-04-10T12:05:00", "id": "RHSA-2018:1055", "href": "https://access.redhat.com/errata/RHSA-2018:1055", "type": "redhat", "title": "(RHSA-2018:1055) Moderate: libvncserver security update", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}], "debian": [{"lastseen": "2020-09-03T01:09:41", "bulletinFamily": "unix", "cvelist": ["CVE-2018-7225"], "description": "- -------------------------------------------------------------------------\nDebian Security Advisory DSA-4221-1 security@debian.org\nhttps://www.debian.org/security/ Moritz Muehlenhoff\nJune 08, 2018 https://www.debian.org/security/faq\n- -------------------------------------------------------------------------\n\nPackage : libvncserver\nCVE ID : CVE-2018-7225\n\nAlexander Peslyak discovered that insufficient input sanitising of RFB\npackets in LibVNCServer could result in the disclosure of memory\ncontents.\n\nFor the oldstable distribution (jessie), this problem has been fixed\nin version 0.9.9+dfsg2-6.1+deb8u3.\n\nFor the stable distribution (stretch), this problem has been fixed in\nversion 0.9.11+dfsg-1+deb9u1.\n\nWe recommend that you upgrade your libvncserver packages.\n\nFor the detailed security status of libvncserver please refer to\nits security tracker page at:\nhttps://security-tracker.debian.org/tracker/libvncserver\n\nFurther information about Debian Security Advisories, how to apply\nthese updates to your system and frequently asked questions can be\nfound at: https://www.debian.org/security/\n\nMailing list: debian-security-announce@lists.debian.org\n", "edition": 12, "modified": "2018-06-08T20:24:40", "published": "2018-06-08T20:24:40", "id": "DEBIAN:DSA-4221-1:052D3", "href": "https://lists.debian.org/debian-security-announce/debian-security-announce-2018/msg00150.html", "title": "[SECURITY] [DSA 4221-1] libvncserver security update", "type": "debian", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2019-05-30T02:22:06", "bulletinFamily": "unix", "cvelist": ["CVE-2018-7225"], "description": "Package : libvncserver\nVersion : 0.9.9+dfsg-1+deb7u3\nCVE ID : CVE-2018-7225\nDebian Bug : 894045\n\nlibvncserver version through 0.9.11. does not sanitize msg.cct.length\nwhich may result in access to uninitialized and potentially sensitive\ndata or possibly unspecified other impact (e.g., an integer overflow)\nvia specially crafted VNC packets.\n\nFor Debian 7 "Wheezy", these problems have been fixed in version\n0.9.9+dfsg-1+deb7u3.\n\nWe recommend that you upgrade your libvncserver packages.\n\nFurther information about Debian LTS security advisories, how to apply\nthese updates to your system and frequently asked questions can be\nfound at: https://wiki.debian.org/LTS\n", "edition": 3, "modified": "2018-03-30T19:27:45", "published": "2018-03-30T19:27:45", "id": "DEBIAN:DLA-1332-1:7BD7C", "href": "https://lists.debian.org/debian-lts-announce/2018/debian-lts-announce-201803/msg00035.html", "title": "[SECURITY] [DLA 1332-1] libvncserver security update", "type": "debian", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2019-11-29T22:14:35", "bulletinFamily": "unix", "cvelist": ["CVE-2019-15681", "CVE-2018-7225", "CVE-2014-6053"], "description": "Package : vino\nVersion : 3.14.0-2+deb8u1\nCVE ID : CVE-2014-6053 CVE-2018-7225 CVE-2019-15681\nDebian Bug : 945784\n\n\nSeveral vulnerabilities have been identified in the VNC code of vino, a\ndesktop sharing utility for the GNOME desktop environment.\n\nThe vulnerabilities referenced below are issues that have originally been\nreported against Debian source package libvncserver. The vino source\npackage in Debian ships a custom-patched and stripped down variant of\nlibvncserver, thus some of libvncserver's security fixes required porting\nover.\n\nCVE-2014-6053\n\n The rfbProcessClientNormalMessage function in\n libvncserver/rfbserver.c in LibVNCServer did not properly handle\n attempts to send a large amount of ClientCutText data, which allowed\n remote attackers to cause a denial of service (memory consumption or\n daemon crash) via a crafted message that was processed by using a\n single unchecked malloc.\n\nCVE-2018-7225\n\n An issue was discovered in LibVNCServer.\n rfbProcessClientNormalMessage() in rfbserver.c did not sanitize\n msg.cct.length, leading to access to uninitialized and potentially\n sensitive data or possibly unspecified other impact (e.g., an integer\n overflow) via specially crafted VNC packets.\n\nCVE-2019-15681\n\n LibVNC contained a memory leak (CWE-655) in VNC server code, which\n allowed an attacker to read stack memory and could be abused for\n information disclosure. Combined with another vulnerability, it could\n be used to leak stack memory and bypass ASLR. This attack appeared to\n be exploitable via network connectivity.\n\n\nFor Debian 8 "Jessie", these problems have been fixed in version\n3.14.0-2+deb8u1.\n\nWe recommend that you upgrade your vino packages.\n\nFurther information about Debian LTS security advisories, how to apply\nthese updates to your system and frequently asked questions can be\nfound at: https://wiki.debian.org/LTS\n\n-- \n\nmike gabriel aka sunweaver (Debian Developer)\nfon: +49 (1520) 1976 148\n\nGnuPG Fingerprint: 9BFB AEE8 6C0A A5FF BF22 0782 9AF4 6B30 2577 1B31\nmail: sunweaver@debian.org, http://sunweavers.net\n", "edition": 1, "modified": "2019-11-29T08:31:28", "published": "2019-11-29T08:31:28", "id": "DEBIAN:DLA-2014-1:AEDFD", "href": "https://lists.debian.org/debian-lts-announce/2019/debian-lts-announce-201911/msg00032.html", "title": "[SECURITY] [DLA 2014-1] vino security update", "type": "debian", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2020-08-12T00:56:49", "bulletinFamily": "unix", "cvelist": ["CVE-2018-20022", "CVE-2019-8287", "CVE-2018-20020", "CVE-2019-15681", "CVE-2018-7225", "CVE-2018-20021", "CVE-2014-6053", "CVE-2019-15678", "CVE-2019-15680", "CVE-2019-15679", "CVE-2018-20748"], "description": "Package : tightvnc\nVersion : 1.3.9-6.5+deb8u1\nCVE ID : CVE-2014-6053 CVE-2018-7225 CVE-2019-8287 CVE-2018-20021 \n CVE-2018-20022 CVE-2019-15678 CVE-2019-15679 CVE-2019-15680 \n CVE-2019-15681\nDebian Bug : 945364\n\n\nSeveral vulnerabilities have recently been discovered in TightVNC 1.x, an\nX11 based VNC server/viewer application for Windows and Unix.\n\nCVE-2014-6053\n\n The rfbProcessClientNormalMessage function in rfbserver.c in TightVNC\n server did not properly handle attempts to send a large amount of\n ClientCutText data, which allowed remote attackers to cause a denial\n of service (memory consumption or daemon crash) via a crafted message\n that was processed by using a single unchecked malloc.\n\nCVE-2018-7225\n\n rfbProcessClientNormalMessage() in rfbserver.c did not sanitize\n msg.cct.length, leading to access to uninitialized and potentially\n sensitive data or possibly unspecified other impact (e.g., an integer\n overflow) via specially crafted VNC packets.\n\nCVE-2019-8287\n\n TightVNC code contained global buffer overflow in HandleCoRREBBP\n macro function, which could potentially have result in code\n execution. This attack appeared to be exploitable via network\n connectivity.\n\n (aka CVE-2018-20020/libvncserver)\n\nCVE-2018-20021\n\n TightVNC in vncviewer/rfbproto.c contained a CWE-835: Infinite loop\n vulnerability. The vulnerability allowed an attacker to consume\n an excessive amount of resources like CPU and RAM.\n\nCVE-2018-20022\n\n TightVNC's vncviewer contained multiple weaknesses CWE-665: Improper\n Initialization vulnerability in VNC client code that allowed\n attackers to read stack memory and could be abused for information\n disclosure. Combined with another vulnerability, it could be used to\n leak stack memory layout and in bypassing ASLR.\n\nCVE-2019-15678\n\n TightVNC code version contained heap buffer overflow in\n rfbServerCutText handler, which could have potentially resulted in\n code execution. This attack appeared to be exploitable via network\n connectivity.\n\n (partially aka CVE-2018-20748/libvnvserver)\n\nCVE-2019-15679\n\n TightVNC's vncviewer code contained a heap buffer overflow in\n InitialiseRFBConnection function, which could have potentially\n resulted in code execution. This attack appeared to be exploitable\n via network connectivity.\n\n (partially aka CVE-2018-20748/libvnvserver)\n\nCVE-2019-15680\n\n TightVNC's vncviewer code contained a null pointer dereference in\n HandleZlibBPP function, which could have resulted in Denial of System\n (DoS). This attack appeared to be exploitable via network\n connectivity.\n\nCVE-2019-15681\n\n TightVNC contained a memory leak (CWE-655) in VNC server code, which\n allowed an attacker to read stack memory and could have been abused\n for information disclosure. Combined with another vulnerability, it\n could have been used to leak stack memory and bypass ASLR. This\n attack appeared to be exploitable via network connectivity.\n\nFor Debian 8 "Jessie", these problems have been fixed in version\n1.3.9-6.5+deb8u1.\n\nWe recommend that you upgrade your tightvnc packages.\n\nFurther information about Debian LTS security advisories, how to apply\nthese updates to your system and frequently asked questions can be\nfound at: https://wiki.debian.org/LTS\n\n-- \n\nmike gabriel aka sunweaver (Debian Developer)\nfon: +49 (1520) 1976 148\n\nGnuPG Fingerprint: 9BFB AEE8 6C0A A5FF BF22 0782 9AF4 6B30 2577 1B31\nmail: sunweaver@debian.org, http://sunweavers.net\n", "edition": 7, "modified": "2019-12-21T16:03:32", "published": "2019-12-21T16:03:32", "id": "DEBIAN:DLA-2045-1:3847F", "href": "https://lists.debian.org/debian-lts-announce/2019/debian-lts-announce-201912/msg00028.html", "title": "[SECURITY] [DLA 2045-1] tightvnc security update", "type": "debian", "cvss": {"score": 7.8, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:C"}}, {"lastseen": "2020-08-12T01:02:38", "bulletinFamily": "unix", "cvelist": ["CVE-2018-20022", "CVE-2018-20020", "CVE-2016-9941", "CVE-2018-15126", "CVE-2019-15681", "CVE-2018-7225", "CVE-2018-20021", "CVE-2018-15127", "CVE-2014-6053", "CVE-2018-20750", "CVE-2018-20024", "CVE-2018-20749", "CVE-2018-6307", "CVE-2014-6055", "CVE-2014-6052", "CVE-2014-6051", "CVE-2018-20019", "CVE-2016-9942", "CVE-2018-20748", "CVE-2014-6054", "CVE-2018-20023"], "description": "Package : italc\nVersion : 1:2.0.2+dfsg1-2+deb8u1\nCVE ID : CVE-2014-6051 CVE-2014-6052 CVE-2014-6053 CVE-2014-6054\n CVE-2014-6055 CVE-2016-9941 CVE-2016-9942 CVE-2018-6307\n CVE-2018-7225 CVE-2018-15126 CVE-2018-15127 CVE-2018-20019\n CVE-2018-20020 CVE-2018-20021 CVE-2018-20022 CVE-2018-20023\n CVE-2018-20024 CVE-2018-20748 CVE-2018-20749 CVE-2018-20750\n CVE-2019-15681\n\n\nSeveral vulnerabilities have been identified in the VNC code of iTALC, a\nclassroom management software. All vulnerabilities referenced below are\nissues that have originally been reported against Debian source package\nlibvncserver. The italc source package in Debian ships a custom-patched\nversion of libvncserver, thus libvncserver's security fixes required\nporting over.\n\nCVE-2014-6051\n\n Integer overflow in the MallocFrameBuffer function in vncviewer.c in\n LibVNCServer allowed remote VNC servers to cause a denial of service\n (crash) and possibly executed arbitrary code via an advertisement for\n a large screen size, which triggered a heap-based buffer overflow.\n\nCVE-2014-6052\n\n The HandleRFBServerMessage function in libvncclient/rfbproto.c in\n LibVNCServer did not check certain malloc return values, which\n allowed remote VNC servers to cause a denial of service (application\n crash) or possibly execute arbitrary code by specifying a large\n screen size in a (1) FramebufferUpdate, (2) ResizeFrameBuffer, or (3)\n PalmVNCReSizeFrameBuffer message.\n\nCVE-2014-6053\n\n The rfbProcessClientNormalMessage function in\n libvncserver/rfbserver.c in LibVNCServer did not properly handle\n attempts to send a large amount of ClientCutText data, which allowed\n remote attackers to cause a denial of service (memory consumption or\n daemon crash) via a crafted message that was processed by using a\n single unchecked malloc.\n\nCVE-2014-6054\n\n The rfbProcessClientNormalMessage function in\n libvncserver/rfbserver.c in LibVNCServer allowed remote attackers to\n cause a denial of service (divide-by-zero error and server crash) via\n a zero value in the scaling factor in a (1) PalmVNCSetScaleFactor or\n (2) SetScale message.\n\nCVE-2014-6055\n\n Multiple stack-based buffer overflows in the File Transfer feature in\n rfbserver.c in LibVNCServer allowed remote authenticated users to\n cause a denial of service (crash) and possibly execute arbitrary code\n via a (1) long file or (2) directory name or the (3) FileTime\n attribute in a rfbFileTransferOffer message.\n\nCVE-2016-9941\n\n Heap-based buffer overflow in rfbproto.c in LibVNCClient in\n LibVNCServer allowed remote servers to cause a denial of service\n (application crash) or possibly execute arbitrary code via a crafted\n FramebufferUpdate message containing a subrectangle outside of the\n client drawing area.\n\nCVE-2016-9942\n\n Heap-based buffer overflow in ultra.c in LibVNCClient in LibVNCServer\n allowed remote servers to cause a denial of service (application\n crash) or possibly execute arbitrary code via a crafted\n FramebufferUpdate message with the Ultra type tile, such that the LZO\n payload decompressed length exceeded what is specified by the tile\n dimensions.\n\nCVE-2018-6307\n\n LibVNC contained heap use-after-free vulnerability in server code of\n file transfer extension that can result remote code execution.\n\nCVE-2018-7225\n\n An issue was discovered in LibVNCServer.\n rfbProcessClientNormalMessage() in rfbserver.c did not sanitize\n msg.cct.length, leading to access to uninitialized and potentially\n sensitive data or possibly unspecified other impact (e.g., an integer\n overflow) via specially crafted VNC packets.\n\nCVE-2018-15126\n\n LibVNC contained heap use-after-free vulnerability in server code of\n file transfer extension that can result remote code execution.\n\nCVE-2018-15127\n\n LibVNC contained heap out-of-bound write vulnerability in server code\n of file transfer extension that can result remote code execution\n\nCVE-2018-20749\n\n LibVNC contained a heap out-of-bounds write vulnerability in\n libvncserver/rfbserver.c. The fix for CVE-2018-15127 was incomplete.\n\nCVE-2018-20750\n\n LibVNC contained a heap out-of-bounds write vulnerability in\n libvncserver/rfbserver.c. The fix for CVE-2018-15127 was incomplete.\n\nCVE-2018-20019\n\n LibVNC contained multiple heap out-of-bound write vulnerabilities in\n VNC client code that can result remote code execution\n\nCVE-2018-20748\n\n LibVNC contained multiple heap out-of-bounds write vulnerabilities in\n libvncclient/rfbproto.c. The fix for CVE-2018-20019 was incomplete.\n\nCVE-2018-20020\n\n LibVNC contained heap out-of-bound write vulnerability inside\n structure in VNC client code that can result remote code execution\n\nCVE-2018-20021\n\n LibVNC contained a CWE-835: Infinite loop vulnerability in VNC client\n code. Vulnerability allows attacker to consume excessive amount of\n resources like CPU and RAM\n\nCVE-2018-20022\n\n LibVNC contained multiple weaknesses CWE-665: Improper Initialization\n vulnerability in VNC client code that allowed attackers to read stack\n memory and could be abused for information disclosure. Combined with\n another vulnerability, it could be used to leak stack memory layout\n and in bypassing ASLR.\n\nCVE-2018-20023\n\n LibVNC contained CWE-665: Improper Initialization vulnerability in\n VNC Repeater client code that allowed attacker to read stack memory\n and could be abused for information disclosure. Combined with another\n vulnerability, it could be used to leak stack memory layout and in\n bypassing ASLR.\n\nCVE-2018-20024\n\n LibVNC contained null pointer dereference in VNC client code that\n could result DoS.\n\nCVE-2019-15681\n\n LibVNC contained a memory leak (CWE-655) in VNC server code, which\n allowed an attacker to read stack memory and could be abused for\n information disclosure. Combined with another vulnerability, it could\n be used to leak stack memory and bypass ASLR. This attack appeared to\n be exploitable via network connectivity.\n\nFor Debian 8 "Jessie", these problems have been fixed in version\n1:2.0.2+dfsg1-2+deb8u1.\n\nWe recommend that you upgrade your italc packages.\n\nFurther information about Debian LTS security advisories, how to apply\nthese updates to your system and frequently asked questions can be\nfound at: https://wiki.debian.org/LTS\n\n-- \n\nmike gabriel aka sunweaver (Debian Developer)\nfon: +49 (1520) 1976 148\n\nGnuPG Fingerprint: 9BFB AEE8 6C0A A5FF BF22 0782 9AF4 6B30 2577 1B31\nmail: sunweaver@debian.org, http://sunweavers.net\n", "edition": 7, "modified": "2019-10-30T22:21:50", "published": "2019-10-30T22:21:50", "id": "DEBIAN:DLA-1979-1:545C6", "href": "https://lists.debian.org/debian-lts-announce/2019/debian-lts-announce-201910/msg00042.html", "title": "[SECURITY] [DLA 1979-1] italc security update", "type": "debian", "cvss": {"score": 7.8, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:C"}}], "amazon": [{"lastseen": "2020-11-10T12:36:42", "bulletinFamily": "unix", "cvelist": ["CVE-2018-7225"], "description": "**Issue Overview:**\n\nImproper input sanitization in rfbProcessClientNormalMessage in rfbserver.c \nAn issue was discovered in LibVNCServer through 0.9.11. rfbProcessClientNormalMessage() in rfbserver.c does not sanitize msg.cct.length, leading to access to uninitialized and potentially sensitive data or possibly unspecified other impact (e.g., an integer overflow) via specially crafted VNC packets.([CVE-2018-7225 __](<https://access.redhat.com/security/cve/CVE-2018-7225>))\n\n \n**Affected Packages:** \n\n\nlibvncserver\n\n \n**Issue Correction:** \nRun _yum update libvncserver_ to update your system. \n\n\n \n\n\n**New Packages:**\n \n \n src: \n libvncserver-0.9.9-12.amzn2.src \n \n x86_64: \n libvncserver-0.9.9-12.amzn2.x86_64 \n libvncserver-devel-0.9.9-12.amzn2.x86_64 \n libvncserver-debuginfo-0.9.9-12.amzn2.x86_64 \n \n \n", "edition": 1, "modified": "2018-05-10T17:21:00", "published": "2018-05-10T17:21:00", "id": "ALAS2-2018-1012", "href": "https://alas.aws.amazon.com/AL2/ALAS-2018-1012.html", "title": "Medium: libvncserver", "type": "amazon", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}], "fedora": [{"lastseen": "2020-12-21T08:17:54", "bulletinFamily": "unix", "cvelist": ["CVE-2018-7225"], "description": "LibVNCServer makes writing a VNC server (or more correctly, a program expor ting a frame-buffer via the Remote Frame Buffer protocol) easy. It hides the programmer from the tedious task of managing clients and compression schemata. ", "modified": "2018-04-03T14:25:24", "published": "2018-04-03T14:25:24", "id": "FEDORA:95EC06075B5F", "href": "", "type": "fedora", "title": "[SECURITY] Fedora 26 Update: libvncserver-0.9.11-3.fc26", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2020-12-21T08:17:54", "bulletinFamily": "unix", "cvelist": ["CVE-2018-7225"], "description": "LibVNCServer makes writing a VNC server (or more correctly, a program expor ting a frame-buffer via the Remote Frame Buffer protocol) easy. It hides the programmer from the tedious task of managing clients and compression schemata. ", "modified": "2018-03-30T13:40:02", "published": "2018-03-30T13:40:02", "id": "FEDORA:AE8AF607126F", "href": "", "type": "fedora", "title": "[SECURITY] Fedora 28 Update: libvncserver-0.9.11-6.fc28", "cvss": {"score": 7.5, "vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P"}}, {"lastseen": "2020-12-21T08:17:54", "bulletinFamily": "unix", "cvelist": ["CVE-2018-7225"], "description": "LibVNCServer makes writing a VNC server (or more correctly, a program expor ting a frame-buffer via the Remote Frame Buffer protocol) easy. It hides the programmer from the tedious task of managing clients and compression schemata. 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