Debian: Security Advisory (DSA-3597-1)

# SPDX-FileCopyrightText: 2016 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("1.3.6.1.4.1.25623.1.0.703597");
  script_cve_id("CVE-2012-6702", "CVE-2016-5300");
  script_tag(name:"creation_date", value:"2016-06-06 22:00:00 +0000 (Mon, 06 Jun 2016)");
  script_version("2024-02-02T05:06:05+0000");
  script_tag(name:"last_modification", value:"2024-02-02 05:06:05 +0000 (Fri, 02 Feb 2024)");
  script_tag(name:"cvss_base", value:"7.8");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:C");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2016-06-18 01:17:18 +0000 (Sat, 18 Jun 2016)");

  script_name("Debian: Security Advisory (DSA-3597-1)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2016 Greenbone AG");
  script_family("Debian Local Security Checks");
  script_dependencies("gather-package-list.nasl");
  script_mandatory_keys("ssh/login/debian_linux", "ssh/login/packages", re:"ssh/login/release=DEB8");

  script_xref(name:"Advisory-ID", value:"DSA-3597-1");
  script_xref(name:"URL", value:"https://www.debian.org/security/2016/DSA-3597-1");
  script_xref(name:"URL", value:"https://security-tracker.debian.org/tracker/DSA-3597");

  script_tag(name:"summary", value:"The remote host is missing an update for the Debian 'expat' package(s) announced via the DSA-3597-1 advisory.");

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

  script_tag(name:"insight", value:"Two related issues have been discovered in Expat, a C library for parsing XML.

CVE-2012-6702

It was introduced when CVE-2012-0876 was addressed. Stefan Sorensen discovered that the use of the function XML_Parse() seeds the random number generator generating repeated outputs for rand() calls.

CVE-2016-5300

It is the product of an incomplete solution for CVE-2012-0876. The parser poorly seeds the random number generator allowing an attacker to cause a denial of service (CPU consumption) via an XML file with crafted identifiers.

You might need to manually restart programs and services using expat libraries.

For the stable distribution (jessie), these problems have been fixed in version 2.1.0-6+deb8u3.

For the unstable distribution (sid), these problems have been fixed in version 2.1.1-3.

We recommend that you upgrade your expat packages.");

  script_tag(name:"affected", value:"'expat' package(s) on Debian 8.");

  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 == "DEB8") {

  if(!isnull(res = isdpkgvuln(pkg:"expat", ver:"2.1.0-6+deb8u3", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"lib64expat1", ver:"2.1.0-6+deb8u3", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"lib64expat1-dev", ver:"2.1.0-6+deb8u3", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libexpat1", ver:"2.1.0-6+deb8u3", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libexpat1-dev", ver:"2.1.0-6+deb8u3", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libexpat1-udeb", ver:"2.1.0-6+deb8u3", rls:"DEB8"))) {
    report += res;
  }

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

exit(0);