CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:N/I:N/A:C
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
EPSS
Percentile
98.1%
Pavel Cheremushkin discovered several vulnerabilities in libvncserver, a library to implement VNC server/client functionalities, which might result in the execution of arbitrary code, denial of service or information disclosure.
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DSA-4383. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#
include("compat.inc");
if (description)
{
script_id(121561);
script_version("1.2");
script_set_attribute(attribute:"plugin_modification_date", value:"2020/02/20");
script_cve_id("CVE-2018-15126", "CVE-2018-15127", "CVE-2018-20019", "CVE-2018-20020", "CVE-2018-20021", "CVE-2018-20022", "CVE-2018-20023", "CVE-2018-20024", "CVE-2018-6307");
script_xref(name:"DSA", value:"4383");
script_name(english:"Debian DSA-4383-1 : libvncserver - security update");
script_summary(english:"Checks dpkg output for the updated package");
script_set_attribute(
attribute:"synopsis",
value:"The remote Debian host is missing a security-related update."
);
script_set_attribute(
attribute:"description",
value:
"Pavel Cheremushkin discovered several vulnerabilities in libvncserver,
a library to implement VNC server/client functionalities, which might
result in the execution of arbitrary code, denial of service or
information disclosure."
);
script_set_attribute(
attribute:"see_also",
value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=916941"
);
# https://security-tracker.debian.org/tracker/source-package/libvncserver
script_set_attribute(
attribute:"see_also",
value:"http://www.nessus.org/u?b930abb4"
);
script_set_attribute(
attribute:"see_also",
value:"https://packages.debian.org/source/stretch/libvncserver"
);
script_set_attribute(
attribute:"see_also",
value:"https://www.debian.org/security/2019/dsa-4383"
);
script_set_attribute(
attribute:"solution",
value:
"Upgrade the libvncserver packages.
For the stable distribution (stretch), these problems have been fixed
in version 0.9.11+dfsg-1.3~deb9u1."
);
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: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:U/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-20020");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libvncserver");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0");
script_set_attribute(attribute:"vuln_publication_date", value:"2018/12/19");
script_set_attribute(attribute:"patch_publication_date", value:"2019/02/03");
script_set_attribute(attribute:"plugin_publication_date", value:"2019/02/04");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_family(english:"Debian Local Security Checks");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");
exit(0);
}
include("audit.inc");
include("debian_package.inc");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);
flag = 0;
if (deb_check(release:"9.0", prefix:"libvncclient1", reference:"0.9.11+dfsg-1.3~deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libvncclient1-dbg", reference:"0.9.11+dfsg-1.3~deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libvncserver-config", reference:"0.9.11+dfsg-1.3~deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libvncserver-dev", reference:"0.9.11+dfsg-1.3~deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libvncserver1", reference:"0.9.11+dfsg-1.3~deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libvncserver1-dbg", reference:"0.9.11+dfsg-1.3~deb9u1")) flag++;
if (flag)
{
if (report_verbosity > 0) security_hole(port:0, extra:deb_report_get());
else security_hole(0);
exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
Vendor | Product | Version | CPE |
---|---|---|---|
debian | debian_linux | libvncserver | p-cpe:/a:debian:debian_linux:libvncserver |
debian | debian_linux | 9.0 | cpe:/o:debian:debian_linux:9.0 |
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-15126
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-15127
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20019
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20020
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20021
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20022
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20023
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20024
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6307
www.nessus.org/u?b930abb4
bugs.debian.org/cgi-bin/bugreport.cgi?bug=916941
packages.debian.org/source/stretch/libvncserver
www.debian.org/security/2019/dsa-4383
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:N/I:N/A:C
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
EPSS
Percentile
98.1%