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
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
74.7%
This update for LibVNCServer fixes the following issues :
Security issues fixed :
CVE-2018-20749: Fixed a heap out of bounds write vulnerability in rfbserver.c (bsc#1123828)
CVE-2018-20750: Fixed a heap out of bounds write vulnerability in rfbserver.c (bsc#1123832)
CVE-2018-20748: Fixed multiple heap out-of-bound writes in VNC client code (bsc#1123823)
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.
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from SUSE update advisory SUSE-SU-2019:13952-1.
# The text itself is copyright (C) SUSE.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(122151);
script_version("1.6");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/06/20");
script_cve_id("CVE-2018-20748", "CVE-2018-20749", "CVE-2018-20750");
script_name(english:"SUSE SLES11 Security Update : LibVNCServer (SUSE-SU-2019:13952-1)");
script_set_attribute(attribute:"synopsis", value:
"The remote SUSE host is missing one or more security updates.");
script_set_attribute(attribute:"description", value:
"This update for LibVNCServer fixes the following issues :
Security issues fixed :
CVE-2018-20749: Fixed a heap out of bounds write vulnerability in
rfbserver.c (bsc#1123828)
CVE-2018-20750: Fixed a heap out of bounds write vulnerability in
rfbserver.c (bsc#1123832)
CVE-2018-20748: Fixed multiple heap out-of-bound writes in VNC client
code (bsc#1123823)
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.");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1123823");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1123828");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1123832");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-20748/");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-20749/");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-20750/");
# https://www.suse.com/support/update/announcement/2019/suse-su-201913952-1.html
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?45c27eb6");
script_set_attribute(attribute:"solution", value:
"To install this SUSE Security Update use the SUSE recommended
installation methods like YaST online_update or 'zypper patch'.
Alternatively you can run the command listed for your product :
SUSE Linux Enterprise Software Development Kit 11-SP4:zypper in -t
patch sdksp4-LibVNCServer-13952=1
SUSE Linux Enterprise Server 11-SP4:zypper in -t patch
slessp4-LibVNCServer-13952=1
SUSE Linux Enterprise Point of Sale 11-SP3:zypper in -t patch
sleposp3-LibVNCServer-13952=1
SUSE Linux Enterprise Debuginfo 11-SP4:zypper in -t patch
dbgsp4-LibVNCServer-13952=1
SUSE Linux Enterprise Debuginfo 11-SP3:zypper in -t patch
dbgsp3-LibVNCServer-13952=1");
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:POC/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-20750");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"vuln_publication_date", value:"2019/01/30");
script_set_attribute(attribute:"patch_publication_date", value:"2019/02/12");
script_set_attribute(attribute:"plugin_publication_date", value:"2019/02/13");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:LibVNCServer");
script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:11");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"SuSE Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2019-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/SuSE/release", "Host/SuSE/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/SuSE/release");
if (isnull(release) || release !~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "SUSE");
os_ver = pregmatch(pattern: "^(SLE(S|D)\d+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "SUSE");
os_ver = os_ver[1];
if (! preg(pattern:"^(SLES11)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE SLES11", "SUSE " + os_ver);
if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if (cpu !~ "^i[3-6]86$" && "x86_64" >!< cpu && "s390x" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "SUSE " + os_ver, cpu);
sp = get_kb_item("Host/SuSE/patchlevel");
if (isnull(sp)) sp = "0";
if (os_ver == "SLES11" && (! preg(pattern:"^(4)$", string:sp))) audit(AUDIT_OS_NOT, "SLES11 SP4", os_ver + " SP" + sp);
flag = 0;
if (rpm_check(release:"SLES11", sp:"4", reference:"LibVNCServer-0.9.1-160.9.1")) 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");
}
Vendor | Product | Version | CPE |
---|---|---|---|
novell | suse_linux | libvncserver | p-cpe:/a:novell:suse_linux:libvncserver |
novell | suse_linux | 11 | cpe:/o:novell:suse_linux:11 |
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20748
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20749
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20750
www.nessus.org/u?45c27eb6
bugzilla.suse.com/show_bug.cgi?id=1123823
bugzilla.suse.com/show_bug.cgi?id=1123828
bugzilla.suse.com/show_bug.cgi?id=1123832
www.suse.com/security/cve/CVE-2018-20748/
www.suse.com/security/cve/CVE-2018-20749/
www.suse.com/security/cve/CVE-2018-20750/
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
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
74.7%