6.8 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
9.8 High
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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
0.011 Low
EPSS
Percentile
84.3%
Security Fix(es) :
A denial of service flaw was found in the TigerVNC’s Xvnc server. A remote unauthenticated attacker could use this flaw to make Xvnc crash by terminating the TLS handshake process early. (CVE-2016-10207)
A buffer overflow flaw, leading to memory corruption, was found in TigerVNC viewer. A remote malicious VNC server could use this flaw to crash the client vncviewer process resulting in denial of service. (CVE-2017-5581)
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text is (C) Scientific Linux.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(99227);
script_version("3.4");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/14");
script_cve_id("CVE-2016-10207", "CVE-2017-5581");
script_name(english:"Scientific Linux Security Update : tigervnc on SL6.x i386/x86_64 (20170321)");
script_summary(english:"Checks rpm output for the updated packages");
script_set_attribute(
attribute:"synopsis",
value:
"The remote Scientific Linux host is missing one or more security
updates."
);
script_set_attribute(
attribute:"description",
value:
"Security Fix(es) :
- A denial of service flaw was found in the TigerVNC's
Xvnc server. A remote unauthenticated attacker could use
this flaw to make Xvnc crash by terminating the TLS
handshake process early. (CVE-2016-10207)
- A buffer overflow flaw, leading to memory corruption,
was found in TigerVNC viewer. A remote malicious VNC
server could use this flaw to crash the client vncviewer
process resulting in denial of service. (CVE-2017-5581)"
);
# https://listserv.fnal.gov/scripts/wa.exe?A2=ind1704&L=scientific-linux-errata&F=&S=&P=5623
script_set_attribute(
attribute:"see_also",
value:"http://www.nessus.org/u?f77d9670"
);
script_set_attribute(attribute:"solution", value:"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
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_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:tigervnc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:tigervnc-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:tigervnc-server");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:tigervnc-server-applet");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:tigervnc-server-module");
script_set_attribute(attribute:"cpe", value:"x-cpe:/o:fermilab:scientific_linux");
script_set_attribute(attribute:"vuln_publication_date", value:"2017/02/28");
script_set_attribute(attribute:"patch_publication_date", value:"2017/03/21");
script_set_attribute(attribute:"plugin_publication_date", value:"2017/04/06");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2017-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_family(english:"Scientific Linux Local Security Checks");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/RedHat/release", "Host/RedHat/rpm-list");
exit(0);
}
include("audit.inc");
include("global_settings.inc");
include("misc_func.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) || "Scientific Linux " >!< release) audit(AUDIT_HOST_NOT, "running Scientific Linux");
os_ver = pregmatch(pattern: "Scientific Linux.*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Scientific Linux");
os_ver = os_ver[1];
if (! preg(pattern:"^6([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Scientific Linux 6.x", "Scientific Linux " + os_ver);
if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if (cpu >!< "x86_64" && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Scientific Linux", cpu);
flag = 0;
if (rpm_check(release:"SL6", reference:"tigervnc-1.1.0-24.el6")) flag++;
if (rpm_check(release:"SL6", reference:"tigervnc-debuginfo-1.1.0-24.el6")) flag++;
if (rpm_check(release:"SL6", reference:"tigervnc-server-1.1.0-24.el6")) flag++;
if (rpm_check(release:"SL6", reference:"tigervnc-server-applet-1.1.0-24.el6")) flag++;
if (rpm_check(release:"SL6", reference:"tigervnc-server-module-1.1.0-24.el6")) flag++;
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
extra : rpm_report_get()
);
exit(0);
}
else
{
tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, "tigervnc / tigervnc-debuginfo / tigervnc-server / etc");
}
Vendor | Product | Version | CPE |
---|---|---|---|
fermilab | scientific_linux | tigervnc | p-cpe:/a:fermilab:scientific_linux:tigervnc |
fermilab | scientific_linux | tigervnc-debuginfo | p-cpe:/a:fermilab:scientific_linux:tigervnc-debuginfo |
fermilab | scientific_linux | tigervnc-server | p-cpe:/a:fermilab:scientific_linux:tigervnc-server |
fermilab | scientific_linux | tigervnc-server-applet | p-cpe:/a:fermilab:scientific_linux:tigervnc-server-applet |
fermilab | scientific_linux | tigervnc-server-module | p-cpe:/a:fermilab:scientific_linux:tigervnc-server-module |
fermilab | scientific_linux | x-cpe:/o:fermilab:scientific_linux |
6.8 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
9.8 High
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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
0.011 Low
EPSS
Percentile
84.3%