CVE-2011-2939
MEDIUM · CVSS 5.1EPSS 2.6%EU EUVD
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.
Key facts
- CVSS score
- 5.1 (v2.0)
- Severity
- MEDIUM
- CVSS vector
AV:N/AC:H/Au:N/C:P/I:P/A:P- Weakness (CWE)
- CWE-189
- EPSS score
- 2.6% (85th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2011-2907)
- Published
- January 13, 2012
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2011-2907 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.
View on the EU Vulnerability DatabaseAffected products
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- dan kogai / encode module
- dan kogai / encode module
- dan kogai / encode module
- dan kogai / encode module
- dan kogai / encode module
- dan kogai / encode module
- dan kogai / encode module
- dan kogai / encode module
- dan kogai / encode module
- dan kogai / encode module
- dan kogai / encode module
- dan kogai / encode module
- dan kogai / encode module
- dan kogai / encode module
- dan kogai / encode module
- dan kogai / encode module
- dan kogai / encode module
- dan kogai / encode module
- dan kogai / encode module
- dan kogai / encode module
- dan kogai / encode module
- dan kogai / encode module
- dan kogai / encode module
- dan kogai / encode module
- dan kogai / encode module
- dan kogai / encode module
- dan kogai / encode module
- dan kogai / encode module
- dan kogai / encode module
- dan kogai / encode module
- dan kogai / encode module
- dan kogai / encode module
- dan kogai / encode module
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and 126 more…
References
- http://cpansearch.perl.org/src/FLORA/perl-5.14.2/pod/perldelta.pod
- http://perl5.git.perl.org/perl.git/commitdiff/e46d973584785af1f445c4dedbee4243419cb860#patch5(Exploit, 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://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(Patch)
- 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(Patch)
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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