Debian LTS: Security Advisory for tar (DLA-1623-1)

2019-01-03T00:00:00
ID OPENVAS:1361412562310891623
Type openvas
Reporter Copyright (C) 2019 Greenbone Networks GmbH http://greenbone.net
Modified 2020-01-29T00:00:00

Description

It was discovered that there was a potential denial of service vulnerability in tar, the GNU version of the tar UNIX archiving utility.

The --sparse argument looped endlessly if the file shrank whilst it was being read. Tar would only break out of this endless loop if the file grew again to (or beyond) its original end of file.

                                        
                                            # Copyright (C) 2019 Greenbone Networks GmbH
# Text descriptions are largely excerpted from the referenced
# advisory, and are Copyright (C) of the respective author(s)
#
# SPDX-License-Identifier: GPL-2.0-or-later
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.891623");
  script_version("2020-01-29T08:22:52+0000");
  script_cve_id("CVE-2018-20482");
  script_name("Debian LTS: Security Advisory for tar (DLA-1623-1)");
  script_tag(name:"last_modification", value:"2020-01-29 08:22:52 +0000 (Wed, 29 Jan 2020)");
  script_tag(name:"creation_date", value:"2019-01-03 00:00:00 +0100 (Thu, 03 Jan 2019)");
  script_tag(name:"cvss_base", value:"1.9");
  script_tag(name:"cvss_base_vector", value:"AV:L/AC:M/Au:N/C:N/I:N/A:P");
  script_tag(name:"solution_type", value:"VendorFix");
  script_tag(name:"qod_type", value:"package");

  script_xref(name:"URL", value:"https://lists.debian.org/debian-lts-announce/2018/12/msg00023.html");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2019 Greenbone Networks GmbH http://greenbone.net");
  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_tag(name:"affected", value:"tar on Debian Linux");

  script_tag(name:"solution", value:"For Debian 8 'Jessie', this issue has been fixed in tar version
1.27.1-2+deb8u2.

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

  script_tag(name:"summary", value:"It was discovered that there was a potential denial of service
vulnerability in tar, the GNU version of the tar UNIX archiving
utility.

The --sparse argument looped endlessly if the file shrank whilst
it was being read. Tar would only break out of this endless loop
if the file grew again to (or beyond) its original end of file.");

  script_tag(name:"vuldetect", value:"This check tests the installed software version using the apt package manager.");

  exit(0);
}

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

res = "";
report = "";
if(!isnull(res = isdpkgvuln(pkg:"tar", ver:"1.27.1-2+deb8u2", rls:"DEB8"))) {
  report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"tar-scripts", ver:"1.27.1-2+deb8u2", rls:"DEB8"))) {
  report += res;
}

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