Ubuntu: Security Advisory (USN-1990-1)

# SPDX-FileCopyrightText: 2013 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.841593");
  script_cve_id("CVE-2013-1056", "CVE-2013-4396");
  script_tag(name:"creation_date", value:"2013-10-18 03:46:14 +0000 (Fri, 18 Oct 2013)");
  script_version("2024-02-02T05:06:04+0000");
  script_tag(name:"last_modification", value:"2024-02-02 05:06:04 +0000 (Fri, 02 Feb 2024)");
  script_tag(name:"cvss_base", value:"6.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:S/C:P/I:P/A:P");

  script_name("Ubuntu: Security Advisory (USN-1990-1)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2013 Greenbone AG");
  script_family("Ubuntu Local Security Checks");
  script_dependencies("gather-package-list.nasl");
  script_mandatory_keys("ssh/login/ubuntu_linux", "ssh/login/packages", re:"ssh/login/release=UBUNTU(12\.04\ LTS|12\.10|13\.04)");

  script_xref(name:"Advisory-ID", value:"USN-1990-1");
  script_xref(name:"URL", value:"https://ubuntu.com/security/notices/USN-1990-1");

  script_tag(name:"summary", value:"The remote host is missing an update for the 'xorg-server, xorg-server-lts-quantal, xorg-server-lts-raring' package(s) announced via the USN-1990-1 advisory.");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable package version is present on the target host.");

  script_tag(name:"insight", value:"Pedro Ribeiro discovered that the X.Org X server incorrectly handled
memory operations when handling ImageText requests. An attacker could use
this issue to cause X.Org to crash, or to possibly execute arbitrary code.
(CVE-2013-4396)

It was discovered that non-root X.Org X servers such as Xephyr incorrectly
used cached xkb files. A local attacker could use this flaw to cause a xkb
cache file to be loaded by another user, resulting in a denial of service.
(CVE-2013-1056)");

  script_tag(name:"affected", value:"'xorg-server, xorg-server-lts-quantal, xorg-server-lts-raring' package(s) on Ubuntu 12.04, Ubuntu 12.10, Ubuntu 13.04.");

  script_tag(name:"solution", value:"Please install the updated package(s).");

  script_tag(name:"solution_type", value:"VendorFix");
  script_tag(name:"qod_type", value:"package");

  exit(0);
}

include("revisions-lib.inc");
include("pkg-lib-deb.inc");

release = dpkg_get_ssh_release();
if(!release)
  exit(0);

res = "";
report = "";

if(release == "UBUNTU12.04 LTS") {

  if(!isnull(res = isdpkgvuln(pkg:"xserver-xorg-core", ver:"2:1.11.4-0ubuntu10.14", rls:"UBUNTU12.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"xserver-xorg-core-lts-quantal", ver:"2:1.13.0-0ubuntu6.1~precise4", rls:"UBUNTU12.04 LTS"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"xserver-xorg-core-lts-raring", ver:"2:1.13.3-0ubuntu6~precise3", rls:"UBUNTU12.04 LTS"))) {
    report += res;
  }

  if(report != "") {
    security_message(data:report);
  } else if(__pkg_match) {
    exit(99);
  }
  exit(0);
}

if(release == "UBUNTU12.10") {

  if(!isnull(res = isdpkgvuln(pkg:"xserver-xorg-core", ver:"2:1.13.0-0ubuntu6.4", rls:"UBUNTU12.10"))) {
    report += res;
  }

  if(report != "") {
    security_message(data:report);
  } else if(__pkg_match) {
    exit(99);
  }
  exit(0);
}

if(release == "UBUNTU13.04") {

  if(!isnull(res = isdpkgvuln(pkg:"xserver-xorg-core", ver:"2:1.13.3-0ubuntu6.2", rls:"UBUNTU13.04"))) {
    report += res;
  }

  if(report != "") {
    security_message(data:report);
  } else if(__pkg_match) {
    exit(99);
  }
  exit(0);
}

exit(0);