Debian: Security Advisory (DSA-4967-1)

# SPDX-FileCopyrightText: 2021 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("1.3.6.1.4.1.25623.1.0.704967");
  script_cve_id("CVE-2021-40153");
  script_tag(name:"creation_date", value:"2021-09-06 01:00:10 +0000 (Mon, 06 Sep 2021)");
  script_version("2024-02-02T05:06:07+0000");
  script_tag(name:"last_modification", value:"2024-02-02 05:06:07 +0000 (Fri, 02 Feb 2024)");
  script_tag(name:"cvss_base", value:"5.8");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:N/I:P/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2021-09-07 19:40:26 +0000 (Tue, 07 Sep 2021)");

  script_name("Debian: Security Advisory (DSA-4967-1)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2021 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=DEB(10|11)");

  script_xref(name:"Advisory-ID", value:"DSA-4967-1");
  script_xref(name:"URL", value:"https://www.debian.org/security/2021/DSA-4967-1");
  script_xref(name:"URL", value:"https://security-tracker.debian.org/tracker/DSA-4967");
  script_xref(name:"URL", value:"https://security-tracker.debian.org/tracker/squashfs-tools");

  script_tag(name:"summary", value:"The remote host is missing an update for the Debian 'squashfs-tools' package(s) announced via the DSA-4967-1 advisory.");

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

  script_tag(name:"insight", value:"Etienne Stalmans discovered that unsquashfs in squashfs-tools, the tools to create and extract Squashfs filesystems, does not validate filenames for traversal outside of the destination directory. An attacker can take advantage of this flaw for writing to arbitrary files to the filesystem if a malformed Squashfs image is processed.

For the oldstable distribution (buster), this problem has been fixed in version 1:4.3-12+deb10u1.

For the stable distribution (bullseye), this problem has been fixed in version 1:4.4-2+deb11u1.

We recommend that you upgrade your squashfs-tools packages.

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

  script_tag(name:"affected", value:"'squashfs-tools' package(s) on Debian 10, 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 == "DEB10") {

  if(!isnull(res = isdpkgvuln(pkg:"squashfs-tools", ver:"1:4.3-12+deb10u1", rls:"DEB10"))) {
    report += res;
  }

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

if(release == "DEB11") {

  if(!isnull(res = isdpkgvuln(pkg:"squashfs-tools", ver:"1:4.4-2+deb11u1", rls:"DEB11"))) {
    report += res;
  }

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

exit(0);