SB2012011302 - Input validation error in Perl
Published: January 13, 2012 Updated: August 4, 2020
Security Bulletin ID
SB2012011302
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Input validation error (CVE-ID: CVE-2011-2939)
The vulnerability allows a remote non-authenticated attacker to read and manipulate data.
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.
Remediation
Install update from vendor's website.
References
- http://cpansearch.perl.org/src/FLORA/perl-5.14.2/pod/perldelta.pod
- http://perl5.git.perl.org/perl.git/commitdiff/e46d973584785af1f445c4dedbee4243419cb860#patch5
- http://search.cpan.org/~flora/perl-5.14.2/pod/perldelta.pod#Encode_decode_xs_n-byte_heap-overflow_(CVE-2011-2939)
- 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/2011/08/19/17
- 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=731246