Vulnerabilities > CVE-2014-6051 - Numeric Errors vulnerability in multiple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
PARTIAL Integrity impact
PARTIAL Availability impact
PARTIAL Summary
Integer overflow in the MallocFrameBuffer function in vncviewer.c in LibVNCServer 0.9.9 and earlier allows remote VNC servers to cause a denial of service (crash) and possibly execute arbitrary code via an advertisement for a large screen size, which triggers a heap-based buffer overflow.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| OS | 2 | |
| OS | 2 | |
| OS | 1 | |
| OS | 1 | |
| Application | 1 |
Common Weakness Enumeration (CWE)
Nessus
NASL family Fedora Local Security Checks NASL id FEDORA_2014-11537.NASL description Various security fixes, including CVE-2014-6051, CVE-2014-6052, CVE-2014-6053, CVE-2014-6054, CVE-2014-6055 Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-03-17 modified 2014-09-29 plugin id 77942 published 2014-09-29 reporter This script is Copyright (C) 2014-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/77942 title Fedora 20 : libvncserver-0.9.10-0.6.20140718git9453be42.fc20 (2014-11537) code #%NASL_MIN_LEVEL 80502 # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Fedora Security Advisory 2014-11537. # include("compat.inc"); if (description) { script_id(77942); script_version("1.7"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12"); script_cve_id("CVE-2010-5304", "CVE-2014-6051", "CVE-2014-6052", "CVE-2014-6053", "CVE-2014-6054", "CVE-2014-6055"); script_bugtraq_id(70091, 70092, 70093, 70094, 70096); script_xref(name:"FEDORA", value:"2014-11537"); script_name(english:"Fedora 20 : libvncserver-0.9.10-0.6.20140718git9453be42.fc20 (2014-11537)"); script_summary(english:"Checks rpm output for the updated package."); script_set_attribute( attribute:"synopsis", value:"The remote Fedora host is missing a security update." ); script_set_attribute( attribute:"description", value: "Various security fixes, including CVE-2014-6051, CVE-2014-6052, CVE-2014-6053, CVE-2014-6054, CVE-2014-6055 Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues." ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1144287" ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1144288" ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1144289" ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1144291" ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1144293" ); # https://lists.fedoraproject.org/pipermail/package-announce/2014-September/139445.html script_set_attribute( attribute:"see_also", value:"http://www.nessus.org/u?50c71a32" ); script_set_attribute( attribute:"solution", value:"Update the affected libvncserver package." ); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P"); script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:ND"); script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available"); script_set_attribute(attribute:"exploit_available", value:"false"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:libvncserver"); script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:20"); script_set_attribute(attribute:"patch_publication_date", value:"2014/09/26"); script_set_attribute(attribute:"plugin_publication_date", value:"2014/09/29"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2014-2020 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"Fedora Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list"); exit(0); } include("audit.inc"); include("global_settings.inc"); include("rpm.inc"); if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED); release = get_kb_item("Host/RedHat/release"); if (isnull(release) || "Fedora" >!< release) audit(AUDIT_OS_NOT, "Fedora"); os_ver = eregmatch(pattern: "Fedora.*release ([0-9]+)", string:release); if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora"); os_ver = os_ver[1]; if (! ereg(pattern:"^20([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 20.x", "Fedora " + os_ver); if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); cpu = get_kb_item("Host/cpu"); if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH); if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Fedora", cpu); flag = 0; if (rpm_check(release:"FC20", reference:"libvncserver-0.9.10-0.6.20140718git9453be42.fc20")) flag++; if (flag) { if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get()); else security_hole(0); exit(0); } else { tested = pkg_tests_get(); if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested); else audit(AUDIT_PACKAGE_NOT_INSTALLED, "libvncserver"); }NASL family Mandriva Local Security Checks NASL id MANDRIVA_MDVSA-2014-229.NASL description Updated libvncserver packages fix security vulnerabilities : A malicious VNC server can trigger incorrect memory management handling by advertising a large screen size parameter to the VNC client. This would result in multiple memory corruptions and could allow remote code execution on the VNC client (CVE-2014-6051, CVE-2014-6052). A malicious VNC client can trigger multiple DoS conditions on the VNC server by advertising a large screen size, ClientCutText message length and/or a zero scaling factor parameter (CVE-2014-6053, CVE-2014-6054). A malicious VNC client can trigger multiple stack-based buffer overflows by passing a long file and directory names and/or attributes (FileTime) when using the file transfer message feature (CVE-2014-6055). Additionally libvncserver has been built against the new system minilzo library which is also being provided with this advisory. last seen 2020-06-01 modified 2020-06-02 plugin id 79589 published 2014-11-27 reporter This script is Copyright (C) 2014-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/79589 title Mandriva Linux Security Advisory : libvncserver (MDVSA-2014:229) code #%NASL_MIN_LEVEL 80502 # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Mandriva Linux Security Advisory MDVSA-2014:229. # The text itself is copyright (C) Mandriva S.A. # include("compat.inc"); if (description) { script_id(79589); script_version("1.4"); script_cvs_date("Date: 2019/08/02 13:32:56"); script_cve_id("CVE-2014-6051", "CVE-2014-6052", "CVE-2014-6053", "CVE-2014-6054", "CVE-2014-6055"); script_bugtraq_id(70091, 70092, 70093, 70094, 70096); script_xref(name:"MDVSA", value:"2014:229"); script_name(english:"Mandriva Linux Security Advisory : libvncserver (MDVSA-2014:229)"); script_summary(english:"Checks rpm output for the updated packages"); script_set_attribute( attribute:"synopsis", value: "The remote Mandriva Linux host is missing one or more security updates." ); script_set_attribute( attribute:"description", value: "Updated libvncserver packages fix security vulnerabilities : A malicious VNC server can trigger incorrect memory management handling by advertising a large screen size parameter to the VNC client. This would result in multiple memory corruptions and could allow remote code execution on the VNC client (CVE-2014-6051, CVE-2014-6052). A malicious VNC client can trigger multiple DoS conditions on the VNC server by advertising a large screen size, ClientCutText message length and/or a zero scaling factor parameter (CVE-2014-6053, CVE-2014-6054). A malicious VNC client can trigger multiple stack-based buffer overflows by passing a long file and directory names and/or attributes (FileTime) when using the file transfer message feature (CVE-2014-6055). Additionally libvncserver has been built against the new system minilzo library which is also being provided with this advisory." ); script_set_attribute( attribute:"see_also", value:"http://advisories.mageia.org/MGASA-2014-0397.html" ); script_set_attribute(attribute:"solution", value:"Update the affected packages."); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P"); script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:ND"); script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available"); script_set_attribute(attribute:"exploit_available", value:"false"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:lib64lzo-devel"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:lib64lzo2_2"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:lib64minilzo0"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:lib64vncserver-devel"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:lib64vncserver0"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:linuxvnc"); script_set_attribute(attribute:"cpe", value:"cpe:/o:mandriva:business_server:1"); script_set_attribute(attribute:"patch_publication_date", value:"2014/11/26"); script_set_attribute(attribute:"plugin_publication_date", value:"2014/11/27"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2014-2019 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"Mandriva Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/Mandrake/release", "Host/Mandrake/rpm-list"); exit(0); } include("audit.inc"); include("global_settings.inc"); include("rpm.inc"); if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED); if (!get_kb_item("Host/Mandrake/release")) audit(AUDIT_OS_NOT, "Mandriva / Mandake Linux"); if (!get_kb_item("Host/Mandrake/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); cpu = get_kb_item("Host/cpu"); if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH); if (cpu !~ "^(amd64|i[3-6]86|x86_64)$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Mandriva / Mandrake Linux", cpu); flag = 0; if (rpm_check(release:"MDK-MBS1", cpu:"x86_64", reference:"lib64lzo-devel-2.08-1.1.mbs1")) flag++; if (rpm_check(release:"MDK-MBS1", cpu:"x86_64", reference:"lib64lzo2_2-2.08-1.1.mbs1")) flag++; if (rpm_check(release:"MDK-MBS1", cpu:"x86_64", reference:"lib64minilzo0-2.08-1.1.mbs1")) flag++; if (rpm_check(release:"MDK-MBS1", cpu:"x86_64", reference:"lib64vncserver-devel-0.9.9-1.mbs1")) flag++; if (rpm_check(release:"MDK-MBS1", cpu:"x86_64", reference:"lib64vncserver0-0.9.9-1.mbs1")) flag++; if (rpm_check(release:"MDK-MBS1", cpu:"x86_64", reference:"linuxvnc-0.9.9-1.mbs1")) flag++; if (flag) { if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get()); else security_hole(0); exit(0); } else audit(AUDIT_HOST_NOT, "affected");NASL family Fedora Local Security Checks NASL id FEDORA_2014-11685.NASL description Various security fixes, including CVE-2014-6051, CVE-2014-6052, CVE-2014-6053, CVE-2014-6054, CVE-2014-6055 Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-03-17 modified 2014-10-01 plugin id 78000 published 2014-10-01 reporter This script is Copyright (C) 2014-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/78000 title Fedora 21 : libvncserver-0.9.10-0.6.20140718git9453be42.fc21 (2014-11685) code #%NASL_MIN_LEVEL 80502 # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Fedora Security Advisory 2014-11685. # include("compat.inc"); if (description) { script_id(78000); script_version("1.7"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12"); script_cve_id("CVE-2010-5304", "CVE-2014-6051", "CVE-2014-6052", "CVE-2014-6053", "CVE-2014-6054", "CVE-2014-6055"); script_bugtraq_id(70091, 70092, 70093, 70094, 70096); script_xref(name:"FEDORA", value:"2014-11685"); script_name(english:"Fedora 21 : libvncserver-0.9.10-0.6.20140718git9453be42.fc21 (2014-11685)"); script_summary(english:"Checks rpm output for the updated package."); script_set_attribute( attribute:"synopsis", value:"The remote Fedora host is missing a security update." ); script_set_attribute( attribute:"description", value: "Various security fixes, including CVE-2014-6051, CVE-2014-6052, CVE-2014-6053, CVE-2014-6054, CVE-2014-6055 Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues." ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1144287" ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1144288" ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1144289" ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1144291" ); script_set_attribute( attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1144293" ); # https://lists.fedoraproject.org/pipermail/package-announce/2014-October/139654.html script_set_attribute( attribute:"see_also", value:"http://www.nessus.org/u?45f4d97a" ); script_set_attribute( attribute:"solution", value:"Update the affected libvncserver package." ); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P"); script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:ND"); script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available"); script_set_attribute(attribute:"exploit_available", value:"false"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:libvncserver"); script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:21"); script_set_attribute(attribute:"patch_publication_date", value:"2014/09/27"); script_set_attribute(attribute:"plugin_publication_date", value:"2014/10/01"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2014-2020 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"Fedora Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list"); exit(0); } include("audit.inc"); include("global_settings.inc"); include("rpm.inc"); if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED); release = get_kb_item("Host/RedHat/release"); if (isnull(release) || "Fedora" >!< release) audit(AUDIT_OS_NOT, "Fedora"); os_ver = eregmatch(pattern: "Fedora.*release ([0-9]+)", string:release); if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora"); os_ver = os_ver[1]; if (! ereg(pattern:"^21([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 21.x", "Fedora " + os_ver); if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); cpu = get_kb_item("Host/cpu"); if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH); if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Fedora", cpu); flag = 0; if (rpm_check(release:"FC21", reference:"libvncserver-0.9.10-0.6.20140718git9453be42.fc21")) flag++; if (flag) { if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get()); else security_hole(0); exit(0); } else { tested = pkg_tests_get(); if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested); else audit(AUDIT_PACKAGE_NOT_INSTALLED, "libvncserver"); }NASL family Fedora Local Security Checks NASL id FEDORA_2014-11541.NASL description Various security fixes, including CVE-2014-6051, CVE-2014-6052, CVE-2014-6053, CVE-2014-6054, CVE-2014-6055 Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-03-17 modified 2014-10-06 plugin id 78053 published 2014-10-06 reporter This script is Copyright (C) 2014-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/78053 title Fedora 19 : libvncserver-0.9.10-0.6.20140718git9453be42.fc19 (2014-11541) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-2365-1.NASL description Nicolas Ruff discovered that LibVNCServer incorrectly handled memory when being advertised large screen sizes by the server. If a user were tricked into connecting to a malicious server, an attacker could use this issue to cause a denial of service, or possibly execute arbitrary code. (CVE-2014-6051, CVE-2014-6052) Nicolas Ruff discovered that LibVNCServer incorrectly handled large ClientCutText messages. A remote attacker could use this issue to cause a server to crash, resulting in a denial of service. (CVE-2014-6053) Nicolas Ruff discovered that LibVNCServer incorrectly handled zero scaling factor values. A remote attacker could use this issue to cause a server to crash, resulting in a denial of service. (CVE-2014-6054) Nicolas Ruff discovered that LibVNCServer incorrectly handled memory in the file transfer feature. A remote attacker could use this issue to cause a server to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2014-6055). Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 77982 published 2014-09-30 reporter Ubuntu Security Notice (C) 2014-2019 Canonical, Inc. / NASL script (C) 2014-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/77982 title Ubuntu 12.04 LTS / 14.04 LTS : libvncserver vulnerabilities (USN-2365-1) NASL family Debian Local Security Checks NASL id DEBIAN_DLA-197.NASL description Several vulnerabilities have been discovered in libvncserver, a library to implement VNC server functionality. These vulnerabilities might result in the execution of arbitrary code or denial of service in both the client and the server side. For the oldstable distribution (squeeze), these problems have been fixed in version 0.9.7-2+deb6u1. This update has been prepared by Nguyen Cong. NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-03-17 modified 2015-04-15 plugin id 82784 published 2015-04-15 reporter This script is Copyright (C) 2015-2020 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/82784 title Debian DLA-197-1 : libvncserver security update NASL family FreeBSD Local Security Checks NASL id FREEBSD_PKG_CB3F036D8C7F11E6924A60A44CE6887B.NASL description Nicolas Ruff reports : Integer overflow in MallocFrameBuffer() on client side. Lack of malloc() return value checking on client side. Server crash on a very large ClientCutText message. Server crash when scaling factor is set to zero. Multiple stack overflows in File Transfer feature. last seen 2020-06-01 modified 2020-06-02 plugin id 93990 published 2016-10-12 reporter This script is Copyright (C) 2016-2018 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/93990 title FreeBSD : libvncserver -- multiple security vulnerabilities (cb3f036d-8c7f-11e6-924a-60a44ce6887b) NASL family Fedora Local Security Checks NASL id FEDORA_2014-11464.NASL description security fix, unbundles libvncserver and uses the system libvncserver. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-03-17 modified 2014-10-09 plugin id 78095 published 2014-10-09 reporter This script is Copyright (C) 2014-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/78095 title Fedora 19 : krfb-4.11.5-4.fc19 (2014-11464) NASL family SuSE Local Security Checks NASL id OPENSUSE-2015-851.NASL description The LibVNCServer package was updated to fix the following security issues : - bsc#897031: fix several security issues : - CVE-2014-6051: Integer overflow in MallocFrameBuffer() on client side. - CVE-2014-6052: Lack of malloc() return value checking on client side. - CVE-2014-6053: Server crash on a very large ClientCutText message. - CVE-2014-6054: Server crash when scaling factor is set to zero. - CVE-2014-6055: Multiple stack overflows in File Transfer feature. - bsc#854151: Restrict the SSL cipher suite. last seen 2020-06-05 modified 2015-12-16 plugin id 87389 published 2015-12-16 reporter This script is Copyright (C) 2015-2020 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/87389 title openSUSE Security Update : LibVNCServer (openSUSE-2015-851) NASL family Oracle Linux Local Security Checks NASL id ORACLELINUX_ELSA-2014-1826.NASL description From Red Hat Security Advisory 2014:1826 : Updated libvncserver packages that fix multiple security issues are now available for Red Hat Enterprise Linux 6 and 7. Red Hat Product Security has rated this update as having Moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. LibVNCServer is a library that allows for easy creation of VNC server or client functionality. An integer overflow flaw, leading to a heap-based buffer overflow, was found in the way screen sizes were handled by LibVNCServer. A malicious VNC server could use this flaw to cause a client to crash or, potentially, execute arbitrary code in the client. (CVE-2014-6051) A NULL pointer dereference flaw was found in LibVNCServer last seen 2020-06-01 modified 2020-06-02 plugin id 79199 published 2014-11-12 reporter This script is Copyright (C) 2014-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/79199 title Oracle Linux 6 / 7 : libvncserver (ELSA-2014-1826) NASL family SuSE Local Security Checks NASL id SUSE_SU-2015-2088-1.NASL description The LibVNCServer package was updated to fix the following security issues : - bsc#897031: fix several security issues : - CVE-2014-6051: Integer overflow in MallocFrameBuffer() on client side. - CVE-2014-6052: Lack of malloc() return value checking on client side. - CVE-2014-6053: Server crash on a very large ClientCutText message. - CVE-2014-6054: Server crash when scaling factor is set to zero. - CVE-2014-6055: Multiple stack overflows in File Transfer feature. - bsc#854151: Restrict the SSL cipher suite. Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 87064 published 2015-11-25 reporter This script is Copyright (C) 2015-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/87064 title SUSE SLED12 / SLES12 Security Update : LibVNCServer (SUSE-SU-2015:2088-1) NASL family Mandriva Local Security Checks NASL id MANDRIVA_MDVSA-2015-146.NASL description Updated libvncserver packages fix security vulnerabilities : An integer overflow in liblzo before 2.07 allows attackers to cause a denial of service or possibly code execution in applications using performing LZO decompression on a compressed payload from the attacker (CVE-2014-4607). The libvncserver library is built with a bundled copy of minilzo, which is a part of liblzo containing the vulnerable code. A malicious VNC server can trigger incorrect memory management handling by advertising a large screen size parameter to the VNC client. This would result in multiple memory corruptions and could allow remote code execution on the VNC client (CVE-2014-6051, CVE-2014-6052). A malicious VNC client can trigger multiple DoS conditions on the VNC server by advertising a large screen size, ClientCutText message length and/or a zero scaling factor parameter (CVE-2014-6053, CVE-2014-6054). A malicious VNC client can trigger multiple stack-based buffer overflows by passing a long file and directory names and/or attributes (FileTime) when using the file transfer message feature (CVE-2014-6055). last seen 2020-06-01 modified 2020-06-02 plugin id 82399 published 2015-03-30 reporter This script is Copyright (C) 2015-2019 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/82399 title Mandriva Linux Security Advisory : libvncserver (MDVSA-2015:146) NASL family Gentoo Local Security Checks NASL id GENTOO_GLSA-201507-07.NASL description The remote host is affected by the vulnerability described in GLSA-201507-07 (LibVNCServer: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in LibVNCServer. Please review the CVE identifiers referenced below for details. Impact : A remote attacker may be able to execute arbitrary code with the privileges of the process or cause a Denial of Service condition. Workaround : There is no known workaround at this time. last seen 2020-06-01 modified 2020-06-02 plugin id 84606 published 2015-07-08 reporter This script is Copyright (C) 2015-2018 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/84606 title GLSA-201507-07 : LibVNCServer: Multiple vulnerabilities NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2014-1826.NASL description Updated libvncserver packages that fix multiple security issues are now available for Red Hat Enterprise Linux 6 and 7. Red Hat Product Security has rated this update as having Moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. LibVNCServer is a library that allows for easy creation of VNC server or client functionality. An integer overflow flaw, leading to a heap-based buffer overflow, was found in the way screen sizes were handled by LibVNCServer. A malicious VNC server could use this flaw to cause a client to crash or, potentially, execute arbitrary code in the client. (CVE-2014-6051) A NULL pointer dereference flaw was found in LibVNCServer last seen 2020-06-01 modified 2020-06-02 plugin id 79202 published 2014-11-12 reporter This script is Copyright (C) 2014-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/79202 title RHEL 6 / 7 : libvncserver (RHSA-2014:1826) NASL family Scientific Linux Local Security Checks NASL id SL_20141111_LIBVNCSERVER_ON_SL6_X.NASL description An integer overflow flaw, leading to a heap-based buffer overflow, was found in the way screen sizes were handled by LibVNCServer. A malicious VNC server could use this flaw to cause a client to crash or, potentially, execute arbitrary code in the client. (CVE-2014-6051) A NULL pointer dereference flaw was found in LibVNCServer last seen 2020-03-18 modified 2014-11-13 plugin id 79230 published 2014-11-13 reporter This script is Copyright (C) 2014-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/79230 title Scientific Linux Security Update : libvncserver on SL6.x, SL7.x i386/x86_64 (20141111) NASL family Debian Local Security Checks NASL id DEBIAN_DSA-3081.NASL description Several vulnerabilities have been discovered in libvncserver, a library to implement VNC server functionality. These vulnerabilities might result in the execution of arbitrary code or denial of service in both the client and the server side. last seen 2020-03-17 modified 2014-12-01 plugin id 79629 published 2014-12-01 reporter This script is Copyright (C) 2014-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/79629 title Debian DSA-3081-1 : libvncserver - security update NASL family CentOS Local Security Checks NASL id CENTOS_RHSA-2014-1826.NASL description Updated libvncserver packages that fix multiple security issues are now available for Red Hat Enterprise Linux 6 and 7. Red Hat Product Security has rated this update as having Moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. LibVNCServer is a library that allows for easy creation of VNC server or client functionality. An integer overflow flaw, leading to a heap-based buffer overflow, was found in the way screen sizes were handled by LibVNCServer. A malicious VNC server could use this flaw to cause a client to crash or, potentially, execute arbitrary code in the client. (CVE-2014-6051) A NULL pointer dereference flaw was found in LibVNCServer last seen 2020-06-01 modified 2020-06-02 plugin id 79188 published 2014-11-12 reporter This script is Copyright (C) 2014-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/79188 title CentOS 6 / 7 : libvncserver (CESA-2014:1826) NASL family SuSE Local Security Checks NASL id SUSE_SU-2015-2110-1.NASL description The libvncserver package was updated to fix the following security issues : - bsc#897031: fix several security issues : - CVE-2014-6051: Integer overflow in MallocFrameBuffer() on client side. - CVE-2014-6052: Lack of malloc() return value checking on client side. - CVE-2014-6053: Server crash on a very large ClientCutText message. - CVE-2014-6054: Server crash when scaling factor is set to zero. - CVE-2014-6055: Multiple stack overflows in File Transfer feature. Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 87105 published 2015-11-30 reporter This script is Copyright (C) 2015-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/87105 title SUSE SLED11 / SLES11 Security Update : LibVNCServer (SUSE-SU-2015:2110-1) NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2015-0113.NASL description Updated libvncserver packages that fix two security issues are now available for Red Hat Enterprise Linux 6.5 Extended Update Support. Red Hat Product Security has rated this update as having Moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. LibVNCServer is a library that allows for easy creation of VNC server or client functionality. An integer overflow flaw, leading to a heap-based buffer overflow, was found in the way screen sizes were handled by LibVNCServer. A malicious VNC server could use this flaw to cause a client to crash or, potentially, execute arbitrary code in the client. (CVE-2014-6051) Two stack-based buffer overflow flaws were found in the way LibVNCServer handled file transfers. A remote attacker could use this flaw to crash the VNC server using a malicious VNC client. (CVE-2014-6055) Red Hat would like to thank oCERT for reporting these issues. oCERT acknowledges Nicolas Ruff as the original reporter. All libvncserver users are advised to upgrade to these updated packages, which contain backported patches to correct these issues. All running applications linked against libvncserver must be restarted for this update to take effect. last seen 2020-06-01 modified 2020-06-02 plugin id 81143 published 2015-02-03 reporter This script is Copyright (C) 2015-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/81143 title RHEL 6 : libvncserver (RHSA-2015:0113) NASL family Gentoo Local Security Checks NASL id GENTOO_GLSA-201612-36.NASL description The remote host is affected by the vulnerability described in GLSA-201612-36 (TigerVNC: Integer overflow) TigerVNC is impacted by the same vulnerability as found in CVE-2014-6051. An integer overflow, leading to a heap-based buffer overflow, was found in the way screen sizes were handled. Impact : A remote attacker, utilizing a malicious VNC server, could execute arbitrary code with the privileges of the user running the client, or cause a Denial of Service condition. Workaround : There is no known workaround at this time. last seen 2020-06-01 modified 2020-06-02 plugin id 95739 published 2016-12-13 reporter This script is Copyright (C) 2016 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/95739 title GLSA-201612-36 : TigerVNC: Integer overflow NASL family Debian Local Security Checks NASL id DEBIAN_DLA-1979.NASL description Several vulnerabilities have been identified in the VNC code of iTALC, a classroom management software. All vulnerabilities referenced below are issues that have originally been reported against Debian source package libvncserver. The italc source package in Debian ships a custom-patched version of libvncserver, thus libvncserver last seen 2020-06-01 modified 2020-06-02 plugin id 130408 published 2019-10-31 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/130408 title Debian DLA-1979-1 : italc security update NASL family SuSE Local Security Checks NASL id SUSE_SU-2015-2088-2.NASL description The LibVNCServer package was updated to fix the following security issues : - bsc#897031: fix several security issues : - CVE-2014-6051: Integer overflow in MallocFrameBuffer() on client side. - CVE-2014-6052: Lack of malloc() return value checking on client side. - CVE-2014-6053: Server crash on a very large ClientCutText message. - CVE-2014-6054: Server crash when scaling factor is set to zero. - CVE-2014-6055: Multiple stack overflows in File Transfer feature. - bsc#854151: Restrict the SSL cipher suite. Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 87721 published 2016-01-04 reporter This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/87721 title SUSE SLES12 Security Update : LibVNCServer (SUSE-SU-2015:2088-2)
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References
- http://lists.fedoraproject.org/pipermail/package-announce/2014-October/139654.html
- http://lists.fedoraproject.org/pipermail/package-announce/2014-September/139445.html
- http://lists.opensuse.org/opensuse-updates/2015-12/msg00022.html
- http://rhn.redhat.com/errata/RHSA-2015-0113.html
- http://seclists.org/oss-sec/2014/q3/639
- http://secunia.com/advisories/61506
- http://www.debian.org/security/2014/dsa-3081
- http://www.ocert.org/advisories/ocert-2014-007.html
- http://www.openwall.com/lists/oss-security/2014/09/25/11
- http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html
- http://www.securityfocus.com/bid/70093
- https://github.com/newsoft/libvncserver/commit/045a044e8ae79db9244593fbce154cdf6e843273
- https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html
- https://security.gentoo.org/glsa/201507-07
- https://security.gentoo.org/glsa/201612-36
- https://usn.ubuntu.com/4587-1/
- https://www.kde.org/info/security/advisory-20140923-1.txt