Debian: Security Advisory (DSA-5271-1)

# SPDX-FileCopyrightText: 2022 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("1.3.6.1.4.1.25623.1.0.705271");
  script_cve_id("CVE-2022-40303", "CVE-2022-40304");
  script_tag(name:"creation_date", value:"2022-11-07 02:00:05 +0000 (Mon, 07 Nov 2022)");
  script_version("2024-02-02T05:06:08+0000");
  script_tag(name:"last_modification", value:"2024-02-02 05:06:08 +0000 (Fri, 02 Feb 2024)");
  script_tag(name:"cvss_base", value:"7.2");
  script_tag(name:"cvss_base_vector", value:"AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2022-11-30 16:26:10 +0000 (Wed, 30 Nov 2022)");

  script_name("Debian: Security Advisory (DSA-5271-1)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2022 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=DEB11");

  script_xref(name:"Advisory-ID", value:"DSA-5271-1");
  script_xref(name:"URL", value:"https://www.debian.org/security/2022/DSA-5271-1");
  script_xref(name:"URL", value:"https://security-tracker.debian.org/tracker/DSA-5271");
  script_xref(name:"URL", value:"https://security-tracker.debian.org/tracker/libxml2");

  script_tag(name:"summary", value:"The remote host is missing an update for the Debian 'libxml2' package(s) announced via the DSA-5271-1 advisory.");

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

  script_tag(name:"insight", value:"Several vulnerabilities were discovered in libxml2, a library providing support to read, modify and write XML and HTML files.

CVE-2022-40303

Maddie Stone discovered that missing safety checks in several functions can result in integer overflows when parsing a XML document with the XML_PARSE_HUGE option enabled.

CVE-2022-40304

Ned Williamson and Nathan Wachholz discovered a vulnerability when handling detection of entity reference cycles, which may result in corrupted dictionary entries. This flaw may lead to logic errors, including memory errors like double free flaws.

For the stable distribution (bullseye), these problems have been fixed in version 2.9.10+dfsg-6.7+deb11u3.

We recommend that you upgrade your libxml2 packages.

For the detailed security status of libxml2 please refer to its security tracker page at: [link moved to references]");

  script_tag(name:"affected", value:"'libxml2' package(s) on Debian 11.");

  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 == "DEB11") {

  if(!isnull(res = isdpkgvuln(pkg:"libxml2", ver:"2.9.10+dfsg-6.7+deb11u3", rls:"DEB11"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libxml2-dev", ver:"2.9.10+dfsg-6.7+deb11u3", rls:"DEB11"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libxml2-doc", ver:"2.9.10+dfsg-6.7+deb11u3", rls:"DEB11"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libxml2-utils", ver:"2.9.10+dfsg-6.7+deb11u3", rls:"DEB11"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"python3-libxml2", ver:"2.9.10+dfsg-6.7+deb11u3", rls:"DEB11"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"python3-libxml2-dbg", ver:"2.9.10+dfsg-6.7+deb11u3", rls:"DEB11"))) {
    report += res;
  }

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

exit(0);