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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
77.2%
An update for gtk-vnc is now available for Red Hat Enterprise Linux 7.
Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
The gtk-vnc packages provide a VNC viewer widget for GTK. The gtk-vnc widget is built by using co-routines, which allows the widget to be completely asynchronous while remaining single-threaded.
The following packages have been upgraded to a later upstream version:
gtk-vnc (0.7.0). (BZ#1416783)
Security Fix(es) :
It was found that gtk-vnc lacked proper bounds checking while processing messages using RRE, hextile, or copyrect encodings. A remote malicious VNC server could use this flaw to crash VNC viewers which are based on the gtk-vnc library. (CVE-2017-5884)
An integer overflow flaw was found in gtk-vnc. A remote malicious VNC server could use this flaw to crash VNC viewers which are based on the gtk-vnc library. (CVE-2017-5885)
Additional Changes :
For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.4 Release Notes linked from the References section.
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2017:2258. The text
# itself is copyright (C) Red Hat, Inc.
#
include("compat.inc");
if (description)
{
script_id(102153);
script_version("3.12");
script_cvs_date("Date: 2019/10/24 15:35:43");
script_cve_id("CVE-2017-5884", "CVE-2017-5885");
script_xref(name:"RHSA", value:"2017:2258");
script_name(english:"RHEL 7 : gtk-vnc (RHSA-2017:2258)");
script_summary(english:"Checks the rpm output for the updated packages");
script_set_attribute(
attribute:"synopsis",
value:"The remote Red Hat host is missing one or more security updates."
);
script_set_attribute(
attribute:"description",
value:
"An update for gtk-vnc is now available for Red Hat Enterprise Linux 7.
Red Hat Product Security has rated this update as having a security
impact of Moderate. A Common Vulnerability Scoring System (CVSS) base
score, which gives a detailed severity rating, is available for each
vulnerability from the CVE link(s) in the References section.
The gtk-vnc packages provide a VNC viewer widget for GTK. The gtk-vnc
widget is built by using co-routines, which allows the widget to be
completely asynchronous while remaining single-threaded.
The following packages have been upgraded to a later upstream version:
gtk-vnc (0.7.0). (BZ#1416783)
Security Fix(es) :
* It was found that gtk-vnc lacked proper bounds checking while
processing messages using RRE, hextile, or copyrect encodings. A
remote malicious VNC server could use this flaw to crash VNC viewers
which are based on the gtk-vnc library. (CVE-2017-5884)
* An integer overflow flaw was found in gtk-vnc. A remote malicious
VNC server could use this flaw to crash VNC viewers which are based on
the gtk-vnc library. (CVE-2017-5885)
Additional Changes :
For detailed information on changes in this release, see the Red Hat
Enterprise Linux 7.4 Release Notes linked from the References section."
);
# https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/
script_set_attribute(
attribute:"see_also",
value:"http://www.nessus.org/u?3395ff0b"
);
script_set_attribute(
attribute:"see_also",
value:"https://access.redhat.com/errata/RHSA-2017:2258"
);
script_set_attribute(
attribute:"see_also",
value:"https://access.redhat.com/security/cve/cve-2017-5884"
);
script_set_attribute(
attribute:"see_also",
value:"https://access.redhat.com/security/cve/cve-2017-5885"
);
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: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:"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:redhat:enterprise_linux:gtk-vnc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:gtk-vnc-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:gtk-vnc-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:gtk-vnc-python");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:gtk-vnc2");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:gtk-vnc2-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:gvnc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:gvnc-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:gvnc-tools");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:gvncpulse");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:gvncpulse-devel");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7.4");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7.5");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7.6");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7.7");
script_set_attribute(attribute:"vuln_publication_date", value:"2017/02/28");
script_set_attribute(attribute:"patch_publication_date", value:"2017/08/01");
script_set_attribute(attribute:"plugin_publication_date", value:"2017/08/03");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_family(english:"Red Hat Local Security Checks");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/cpu");
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) || "Red Hat" >!< release) audit(AUDIT_OS_NOT, "Red Hat");
os_ver = pregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Red Hat");
os_ver = os_ver[1];
if (! preg(pattern:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 7.x", "Red Hat " + os_ver);
if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "s390" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Red Hat", cpu);
yum_updateinfo = get_kb_item("Host/RedHat/yum-updateinfo");
if (!empty_or_null(yum_updateinfo))
{
rhsa = "RHSA-2017:2258";
yum_report = redhat_generate_yum_updateinfo_report(rhsa:rhsa);
if (!empty_or_null(yum_report))
{
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
extra : yum_report
);
exit(0);
}
else
{
audit_message = "affected by Red Hat security advisory " + rhsa;
audit(AUDIT_OS_NOT, audit_message);
}
}
else
{
flag = 0;
if (rpm_check(release:"RHEL7", reference:"gtk-vnc-0.7.0-2.el7")) flag++;
if (rpm_check(release:"RHEL7", reference:"gtk-vnc-debuginfo-0.7.0-2.el7")) flag++;
if (rpm_check(release:"RHEL7", reference:"gtk-vnc-devel-0.7.0-2.el7")) flag++;
if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"gtk-vnc-python-0.7.0-2.el7")) flag++;
if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"gtk-vnc-python-0.7.0-2.el7")) flag++;
if (rpm_check(release:"RHEL7", reference:"gtk-vnc2-0.7.0-2.el7")) flag++;
if (rpm_check(release:"RHEL7", reference:"gtk-vnc2-devel-0.7.0-2.el7")) flag++;
if (rpm_check(release:"RHEL7", reference:"gvnc-0.7.0-2.el7")) flag++;
if (rpm_check(release:"RHEL7", reference:"gvnc-devel-0.7.0-2.el7")) flag++;
if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"gvnc-tools-0.7.0-2.el7")) flag++;
if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"gvnc-tools-0.7.0-2.el7")) flag++;
if (rpm_check(release:"RHEL7", reference:"gvncpulse-0.7.0-2.el7")) flag++;
if (rpm_check(release:"RHEL7", reference:"gvncpulse-devel-0.7.0-2.el7")) flag++;
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
extra : rpm_report_get() + redhat_report_package_caveat()
);
exit(0);
}
else
{
tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, "gtk-vnc / gtk-vnc-debuginfo / gtk-vnc-devel / gtk-vnc-python / etc");
}
}
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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
77.2%