Debian: Security Advisory (DLA-63-1)

# SPDX-FileCopyrightText: 2023 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("1.3.6.1.4.1.25623.1.1.1.2.2014.63");
  script_cve_id("CVE-2014-7169", "CVE-2014-7186", "CVE-2014-7187");
  script_tag(name:"creation_date", value:"2023-03-08 12:56:44 +0000 (Wed, 08 Mar 2023)");
  script_version("2024-08-08T05:05:41+0000");
  script_tag(name:"last_modification", value:"2024-08-08 05:05:41 +0000 (Thu, 08 Aug 2024)");
  script_tag(name:"cvss_base", value:"10.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2024-07-24 16:47:58 +0000 (Wed, 24 Jul 2024)");

  script_name("Debian: Security Advisory (DLA-63-1)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2023 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=DEB6");

  script_xref(name:"Advisory-ID", value:"DLA-63-1");
  script_xref(name:"URL", value:"https://www.debian.org/lts/security/2014/DLA-63-1");

  script_tag(name:"summary", value:"The remote host is missing an update for the Debian 'bash' package(s) announced via the DLA-63-1 advisory.");

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

  script_tag(name:"insight", value:"Tavis Ormandy discovered that the patch applied to fix CVE-2014-6271 released in DLA-59-1 for bash, the GNU Bourne-Again Shell, was incomplete and could still allow some characters to be injected into another environment (CVE-2014-7169). With this update prefix and suffix for environment variable names which contain shell functions are added as hardening measure.

Additionally two out-of-bounds array accesses in the bash parser are fixed which were revealed in Red Hat's internal analysis for these issues and also independently reported by Todd Sabin.

For Debian 6 Squeeze, these issues have been fixed in bash version 4.1-3+deb6u2");

  script_tag(name:"affected", value:"'bash' package(s) on Debian 6.");

  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");
  script_xref(name:"CISA", value:"Known Exploited Vulnerability (KEV) catalog");
  script_xref(name:"URL", value:"https://www.cisa.gov/known-exploited-vulnerabilities-catalog");

  exit(0);
}

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

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

res = "";
report = "";

if(release == "DEB6") {

  if(!isnull(res = isdpkgvuln(pkg:"bash", ver:"4.1-3+deb6u2", rls:"DEB6"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"bash-builtins", ver:"4.1-3+deb6u2", rls:"DEB6"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"bash-doc", ver:"4.1-3+deb6u2", rls:"DEB6"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"bash-static", ver:"4.1-3+deb6u2", rls:"DEB6"))) {
    report += res;
  }

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

exit(0);