Vulnerability identifier: #VU43242

Vulnerability risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2011-2728

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Perl
Universal components / Libraries / Scripting languages

Vendor: Perl

Description

The vulnerability allows a remote non-authenticated attacker to perform service disruption.

The bsd_glob function in the File::Glob module for Perl before 5.14.2 allows context-dependent attackers to cause a denial of service (crash) via a glob expression with the GLOB_ALTDIRFUNC flag, which triggers an uninitialized pointer dereference.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Perl: 1.00 - 1.49, 2.0.0, 2.1.0 - 2.1.3, 2.2.0 - 2.2.2, 2.3.0, 2.4.0, 2.5.0 - 2.5.1, 2.6.0 - 2.6.6, 2.7.0 - 2.7.2, 2.8.0 - 2.8.8, 2.9.0 - 2.9.2, 2.10.0 - 2.10.7, 2.11.0 - 2.11.8, 2.12.0, 2.13.0, 2.14.0 - 2.14.1, 2.15.0 - 2.15.1, 2.16.0 - 2.16.1, 2.17.0 - 2.17.2, 2.18.0 - 2.18.1, 5.6.0 - 5.6.1, 5.8.0 - 5.8.10, 5.9.2, 5.10 - 5.10.1, 5.11.0 - 5.11.5, 5.12.0 - 5.12.3, 5.13.0 - 5.13.11, 5.14.0

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External links
http://cpansearch.perl.org/src/FLORA/perl-5.14.2/pod/perldelta.pod
http://lists.fedoraproject.org/pipermail/package-announce/2011-November/069752.html
http://perl5.git.perl.org/perl.git/commit/1af4051e077438976a4c12a0622feaf6715bec77
http://secunia.com/advisories/46172
http://www.securityfocus.com/bid/49858
http://blogs.oracle.com/sunsecurity/entry/cve_2011_2728_denial_of1
http://bugzilla.redhat.com/show_bug.cgi?id=742987

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.