CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:N/A:P
EPSS
Percentile
94.3%
Updated xorg-x11-server packages that fix one security issue are now available for Red Hat Enterprise Linux 6 and 7.
Red Hat Product Security has rated this update as having Moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.
X.Org is an open source implementation of the X Window System. It provides the basic low-level functionality that full-fledged graphical user interfaces are designed upon.
A buffer over-read flaw was found in the way the X.Org server handled XkbGetGeometry requests. A malicious, authorized client could use this flaw to disclose portions of the X.Org server memory, or cause the X.Org server to crash using a specially crafted XkbGetGeometry request. (CVE-2015-0255)
This issue was discovered by Olivier Fourdan of Red Hat.
All xorg-x11-server users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue.
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2015:0797. The text
# itself is copyright (C) Red Hat, Inc.
#
include("compat.inc");
if (description)
{
script_id(82693);
script_version("1.13");
script_cvs_date("Date: 2019/10/24 15:35:39");
script_cve_id("CVE-2015-0255");
script_xref(name:"RHSA", value:"2015:0797");
script_name(english:"RHEL 6 / 7 : xorg-x11-server (RHSA-2015:0797)");
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:
"Updated xorg-x11-server packages that fix one security issue are now
available for Red Hat Enterprise Linux 6 and 7.
Red Hat Product Security has rated this update as having Moderate
security impact. A Common Vulnerability Scoring System (CVSS) base
score, which gives a detailed severity rating, is available from the
CVE link in the References section.
X.Org is an open source implementation of the X Window System. It
provides the basic low-level functionality that full-fledged graphical
user interfaces are designed upon.
A buffer over-read flaw was found in the way the X.Org server handled
XkbGetGeometry requests. A malicious, authorized client could use this
flaw to disclose portions of the X.Org server memory, or cause the
X.Org server to crash using a specially crafted XkbGetGeometry
request. (CVE-2015-0255)
This issue was discovered by Olivier Fourdan of Red Hat.
All xorg-x11-server users are advised to upgrade to these updated
packages, which contain a backported patch to correct this issue."
);
# http://www.x.org/wiki/Development/Security/Advisory-2015-02-10/
script_set_attribute(
attribute:"see_also",
value:"https://www.x.org/wiki/Development/Security/Advisory-2015-02-10/"
);
script_set_attribute(
attribute:"see_also",
value:"https://access.redhat.com/errata/RHSA-2015:0797"
);
script_set_attribute(
attribute:"see_also",
value:"https://access.redhat.com/security/cve/cve-2015-0255"
);
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:N/A:P");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/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:xorg-x11-server-Xdmx");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:xorg-x11-server-Xephyr");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:xorg-x11-server-Xnest");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:xorg-x11-server-Xorg");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:xorg-x11-server-Xvfb");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:xorg-x11-server-common");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:xorg-x11-server-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:xorg-x11-server-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:xorg-x11-server-source");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:6");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:6.6");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7.1");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7.2");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7.3");
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:"2015/02/13");
script_set_attribute(attribute:"patch_publication_date", value:"2015/04/10");
script_set_attribute(attribute:"plugin_publication_date", value:"2015/04/10");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2015-2019 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:"^(6|7)([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 6.x / 7.x", "Red Hat " + os_ver);
if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "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-2015:0797";
yum_report = redhat_generate_yum_updateinfo_report(rhsa:rhsa);
if (!empty_or_null(yum_report))
{
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
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:"RHEL6", cpu:"i686", reference:"xorg-x11-server-Xdmx-1.15.0-26.el6_6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"xorg-x11-server-Xdmx-1.15.0-26.el6_6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"xorg-x11-server-Xdmx-1.15.0-26.el6_6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"i686", reference:"xorg-x11-server-Xephyr-1.15.0-26.el6_6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"xorg-x11-server-Xephyr-1.15.0-26.el6_6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"xorg-x11-server-Xephyr-1.15.0-26.el6_6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"i686", reference:"xorg-x11-server-Xnest-1.15.0-26.el6_6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"xorg-x11-server-Xnest-1.15.0-26.el6_6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"xorg-x11-server-Xnest-1.15.0-26.el6_6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"i686", reference:"xorg-x11-server-Xorg-1.15.0-26.el6_6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"xorg-x11-server-Xorg-1.15.0-26.el6_6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"i686", reference:"xorg-x11-server-Xvfb-1.15.0-26.el6_6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"xorg-x11-server-Xvfb-1.15.0-26.el6_6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"xorg-x11-server-Xvfb-1.15.0-26.el6_6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"i686", reference:"xorg-x11-server-common-1.15.0-26.el6_6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"xorg-x11-server-common-1.15.0-26.el6_6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"xorg-x11-server-common-1.15.0-26.el6_6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"i686", reference:"xorg-x11-server-debuginfo-1.15.0-26.el6_6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"s390x", reference:"xorg-x11-server-debuginfo-1.15.0-26.el6_6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"xorg-x11-server-debuginfo-1.15.0-26.el6_6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"i686", reference:"xorg-x11-server-devel-1.15.0-26.el6_6")) flag++;
if (rpm_check(release:"RHEL6", cpu:"x86_64", reference:"xorg-x11-server-devel-1.15.0-26.el6_6")) flag++;
if (rpm_check(release:"RHEL6", reference:"xorg-x11-server-source-1.15.0-26.el6_6")) flag++;
if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"xorg-x11-server-Xdmx-1.15.0-33.el7_1")) flag++;
if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"xorg-x11-server-Xdmx-1.15.0-33.el7_1")) flag++;
if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"xorg-x11-server-Xephyr-1.15.0-33.el7_1")) flag++;
if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"xorg-x11-server-Xephyr-1.15.0-33.el7_1")) flag++;
if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"xorg-x11-server-Xnest-1.15.0-33.el7_1")) flag++;
if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"xorg-x11-server-Xnest-1.15.0-33.el7_1")) flag++;
if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"xorg-x11-server-Xorg-1.15.0-33.el7_1")) flag++;
if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"xorg-x11-server-Xvfb-1.15.0-33.el7_1")) flag++;
if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"xorg-x11-server-Xvfb-1.15.0-33.el7_1")) flag++;
if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"xorg-x11-server-common-1.15.0-33.el7_1")) flag++;
if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"xorg-x11-server-common-1.15.0-33.el7_1")) flag++;
if (rpm_check(release:"RHEL7", cpu:"i686", reference:"xorg-x11-server-debuginfo-1.15.0-33.el7_1")) flag++;
if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"xorg-x11-server-debuginfo-1.15.0-33.el7_1")) flag++;
if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"xorg-x11-server-debuginfo-1.15.0-33.el7_1")) flag++;
if (rpm_check(release:"RHEL7", cpu:"i686", reference:"xorg-x11-server-devel-1.15.0-33.el7_1")) flag++;
if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"xorg-x11-server-devel-1.15.0-33.el7_1")) flag++;
if (rpm_check(release:"RHEL7", reference:"xorg-x11-server-source-1.15.0-33.el7_1")) flag++;
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
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, "xorg-x11-server-Xdmx / xorg-x11-server-Xephyr / etc");
}
}
Vendor | Product | Version | CPE |
---|---|---|---|
redhat | enterprise_linux | xorg-x11-server-xdmx | p-cpe:/a:redhat:enterprise_linux:xorg-x11-server-xdmx |
redhat | enterprise_linux | xorg-x11-server-xephyr | p-cpe:/a:redhat:enterprise_linux:xorg-x11-server-xephyr |
redhat | enterprise_linux | xorg-x11-server-xnest | p-cpe:/a:redhat:enterprise_linux:xorg-x11-server-xnest |
redhat | enterprise_linux | xorg-x11-server-xorg | p-cpe:/a:redhat:enterprise_linux:xorg-x11-server-xorg |
redhat | enterprise_linux | xorg-x11-server-xvfb | p-cpe:/a:redhat:enterprise_linux:xorg-x11-server-xvfb |
redhat | enterprise_linux | xorg-x11-server-common | p-cpe:/a:redhat:enterprise_linux:xorg-x11-server-common |
redhat | enterprise_linux | xorg-x11-server-debuginfo | p-cpe:/a:redhat:enterprise_linux:xorg-x11-server-debuginfo |
redhat | enterprise_linux | xorg-x11-server-devel | p-cpe:/a:redhat:enterprise_linux:xorg-x11-server-devel |
redhat | enterprise_linux | xorg-x11-server-source | p-cpe:/a:redhat:enterprise_linux:xorg-x11-server-source |
redhat | enterprise_linux | 6 | cpe:/o:redhat:enterprise_linux:6 |