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CVE-2011-2939
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…
Medium5.1EPSS 2.6%
- Published
- Updated
- Reserved
- Assigned by
- redhat
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Medium5.1 | AV:N/AC:H/Au:N/C:P/I:P/A:P |
- EPSS (exploitation in 30 days)
- 2.6% · top 15% of all CVEs (3 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.1.
Weakness
Affected products
n/a
- affected n/a
References (14)
- 46989 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- http://cpansearch.perl.org/src/FLORA/perl-5.14.2/pod/perldelta.pod (opens in a new tab)x_refsource_CONFIRMx_transferred
- 55314 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- USN-1643-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- 49858 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- [oss-security] 20110818 CVE request: heap overflow in perl while decoding Unicode string (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- http://perl5.git.perl.org/perl.git/commitdiff/e46d973584785af1f445c4dedbee4243419cb860#patch5 (opens in a new tab)x_refsource_CONFIRMx_transferred
- 46172 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- https://bugzilla.redhat.com/show_bug.cgi?id=731246 (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://search.cpan.org/~flora/perl-5.14.2/pod/perldelta.pod#Encode_decode_xs_n-byte_heap-overflow_%28CVE-2011-2939%29 (opens in a new tab)x_refsource_CONFIRMx_transferred
- MDVSA-2012:008 (opens in a new tab)vendor-advisoryx_refsource_MANDRIVAx_transferred
- RHSA-2011:1424 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- [oss-security] 20110819 Re: CVE request: heap overflow in perl while decoding Unicode string (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- 51457 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Record last updated .