Vulnerability Description
Off-by-one error in the decode_xs function in Unicode/Unicode.xs in the Encode module before 2.44, as used in Perl before 5.15.6, might allow context-dependent attackers to cause a denial of service (memory corruption) via a crafted Unicode string, which triggers a heap-based buffer overflow.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Dan Kogai | Encode Module | <= 2.43 |
| Perl | Perl | <= 5.14.2 |
Related Weaknesses (CWE)
References
- http://cpansearch.perl.org/src/FLORA/perl-5.14.2/pod/perldelta.pod
- http://perl5.git.perl.org/perl.git/commitdiff/e46d973584785af1f445c4dedbee424341ExploitPatch
- http://search.cpan.org/~flora/perl-5.14.2/pod/perldelta.pod#Encode_decode_xs_n-b
- http://secunia.com/advisories/46172
- http://secunia.com/advisories/46989
- http://secunia.com/advisories/51457
- http://secunia.com/advisories/55314
- http://www.mandriva.com/security/advisories?name=MDVSA-2012:008
- http://www.openwall.com/lists/oss-security/2011/08/18/8
- http://www.openwall.com/lists/oss-security/2011/08/19/17Patch
- http://www.redhat.com/support/errata/RHSA-2011-1424.html
- http://www.securityfocus.com/bid/49858
- http://www.ubuntu.com/usn/USN-1643-1
- https://bugzilla.redhat.com/show_bug.cgi?id=731246Patch
- http://cpansearch.perl.org/src/FLORA/perl-5.14.2/pod/perldelta.pod
FAQ
What is CVE-2011-2939?
CVE-2011-2939 is a vulnerability with a CVSS score of 5.1 (MEDIUM). Off-by-one error in the decode_xs function in Unicode/Unicode.xs in the Encode module before 2.44, as used in Perl before 5.15.6, might allow context-dependent attackers to cause a denial of service (...
How severe is CVE-2011-2939?
CVE-2011-2939 has been rated MEDIUM with a CVSS base score of 5.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2011-2939?
Check the references section above for vendor advisories and patch information. Affected products include: Dan Kogai Encode Module, Perl Perl.