Debian Security Advisory DSA 2641-2 (perl - rehashing flaw)

2013-03-20T00:00:00
ID OPENVAS:892641
Type openvas
Reporter Copyright (c) 2013 Greenbone Networks GmbH http://greenbone.net
Modified 2017-07-07T00:00:00

Description

Yves Orton discovered a flaw in the rehashing code of Perl. This flaw could be exploited to carry out a denial of service attack against code that uses arbitrary user input as hash keys. Specifically an attacker could create a set of keys of a hash causing a denial of service via memory exhaustion.

                                        
                                            # OpenVAS Vulnerability Test
# $Id: deb_2641.nasl 6611 2017-07-07 12:07:20Z cfischer $
# Auto-generated from advisory DSA 2641-2 using nvtgen 1.0
# Script version: 2.0
#
# Author:
# Greenbone Networks
#
# Copyright:
# Copyright (c) 2013 Greenbone Networks GmbH http://greenbone.net
# Text descriptions are largely excerpted from the referenced
# advisory, and are Copyright (c) the respective author(s)
#
# 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.
#

include("revisions-lib.inc");

tag_affected  = "perl on Debian Linux";
tag_insight   = "An interpreted scripting language, known among some as 'Unix's Swiss
Army Chainsaw'.";
tag_solution  = "For the stable distribution (squeeze), this problem has been fixed in
version 5.10.1-17squeeze6 of perl and version
2.0.4-7+squeeze1 of libapache2-mod-perl2.

For the testing distribution (wheezy), and the unstable distribution
(sid), this problem has been fixed in version 5.14.2-19
of perl and version 2.0.7-3 of libapache2-mod-perl2.

We recommend that you upgrade your perl and libapache2-mod-perl2 packages.";
tag_summary   = "Yves Orton discovered a flaw in the rehashing code of Perl. This flaw
could be exploited to carry out a denial of service attack against code
that uses arbitrary user input as hash keys. Specifically an attacker
could create a set of keys of a hash causing a denial of service via
memory exhaustion.";
tag_vuldetect = "This check tests the installed software version using the apt package manager.";

if(description)
{
    script_id(892641);
    script_version("$Revision: 6611 $");
    script_cve_id("CVE-2013-1667");
    script_name("Debian Security Advisory DSA 2641-2 (perl - rehashing flaw)");
    script_tag(name: "last_modification", value:"$Date: 2017-07-07 14:07:20 +0200 (Fri, 07 Jul 2017) $");
    script_tag(name: "creation_date", value:"2013-03-20 00:00:00 +0100 (Wed, 20 Mar 2013)");
    script_tag(name: "cvss_base", value:"7.5");
    script_tag(name: "cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:P/A:P");

    script_xref(name: "URL", value: "http://www.debian.org/security/2013/dsa-2641.html");


    script_category(ACT_GATHER_INFO);

    script_copyright("Copyright (c) 2013 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");
    script_tag(name: "affected",  value: tag_affected);
    script_tag(name: "insight",   value: tag_insight);
#    script_tag(name: "impact",    value: tag_impact);
    script_tag(name: "solution",  value: tag_solution);
    script_tag(name: "summary",   value: tag_summary);
    script_tag(name: "vuldetect", value: tag_vuldetect);
    script_tag(name:"qod_type", value:"package");
    script_tag(name:"solution_type", value:"VendorFix");

    exit(0);
}

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

res = "";
report = "";
if ((res = isdpkgvuln(pkg:"libapache2-mod-perl2", ver:"2.0.4-7+squeeze1", rls:"DEB6.0")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libapache2-mod-perl2-dev", ver:"2.0.4-7+squeeze1", rls:"DEB6.0")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libapache2-mod-perl2-doc", ver:"2.0.4-7+squeeze1", rls:"DEB6.0")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libapache2-mod-perl2", ver:"2.0.7-3", rls:"DEB7.0")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libapache2-mod-perl2-dev", ver:"2.0.7-3", rls:"DEB7.0")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libapache2-mod-perl2-doc", ver:"2.0.7-3", rls:"DEB7.0")) != NULL) {
    report += res;
}

if (report != "") {
    security_message(data:report);
} else if (__pkg_match) {
    exit(99); # Not vulnerable.
}