CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
EPSS
Percentile
98.8%
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.
#%NASL_MIN_LEVEL 70300
#
# (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('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(79589);
script_version("1.5");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/06");
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) 2014-2021 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");
advisories.mageia.org/MGASA-2014-0397.html
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-6051
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-6052
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-6053
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-6054
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-6055