CVE-2011-2939

Public Exploit

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.

Category

5.1
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 3.69% Top 15%
Vendor Advisory ubuntu.com Vendor Advisory mandriva.com Vendor Advisory redhat.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://secunia.com/advisories/46989 third party advisory
http://cpansearch.perl.org/src/FLORA/perl-5.14.2/pod/perldelta.pod
http://secunia.com/advisories/55314 third party advisory
http://www.ubuntu.com/usn/USN-1643-1 vendor advisory
http://www.securityfocus.com/bid/49858 vdb entry
http://www.openwall.com/lists/oss-security/2011/08/18/8 mailing list
http://perl5.git.perl.org/perl.git/commitdiff/e46d973584785af1f445c4dedbee4243419cb860#patch5 patch exploit
http://secunia.com/advisories/46172 third party advisory
https://bugzilla.redhat.com/show_bug.cgi?id=731246 patch
http://search.cpan.org/~flora/perl-5.14.2/pod/perldelta.pod#Encode_decode_xs_n-byte_heap-overflow_%28CVE-2011-2939%29
http://www.mandriva.com/security/advisories?name=MDVSA-2012:008 vendor advisory
http://www.redhat.com/support/errata/RHSA-2011-1424.html vendor advisory
http://www.openwall.com/lists/oss-security/2011/08/19/17 mailing list patch
http://secunia.com/advisories/51457 third party advisory

Frequently Asked Questions

What is the severity of CVE-2011-2939?
CVE-2011-2939 has been scored as a medium severity vulnerability.
How to fix CVE-2011-2939?
To fix CVE-2011-2939, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2011-2939 being actively exploited in the wild?
It is possible that CVE-2011-2939 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~4% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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