Description
Off-by-one error in the XML signature feature in Apache XML Security for C++ 1.6.0, as used in Shibboleth before 2.4.3 and possibly other products, allows remote attackers to cause a denial of service (crash) via a signature using a large RSA key, which triggers a buffer overflow.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | xml-security-c | 1.6.1-1 | — |
| Debian 13 | xml-security-c | 1.6.1-1 | — |
| Debian 12 | xml-security-c | 1.6.1-1 | — |
| Debian 6.0 | xml-security-c | 1.5.1-3+squeeze1 | DSA-2277-1 |
| Debian 5.0 | xml-security-c | 1.4.0-3+lenny3 | DSA-2277-1 |
Advisories 1
- DSA-2277-1 xml-security-c - buffer overflow Debian Security (DSA / DLA) · Mar 9, 2026
References
- DSA-2277 vendor-advisory
- 45491 third-party-advisory
- 45151 third-party-advisory
- 20110707 Security Advisory: CVE-2011-2516 mailing-list
- apache-xml-dos(68420) vdb-entry
- https://issues.apache.org/jira/browse/SANTUARIO-271
- http://santuario.apache.org/secadv/CVE-2011-2516.txt
- FEDORA-2011-9501 vendor-advisory
- 45198 third-party-advisory
- 45191 third-party-advisory
- http://shibboleth.internet2.edu/secadv/secadv_20110706.txt
- 1025755 vdb-entry
- FEDORA-2011-9494 vendor-advisory
- 48611 vdb-entry
- [santuario-commits] 20190823 svn commit: r1049214 - in /websites/production/santuario/content: cache/main.pageCache download.html index.html javaindex.html javareleasenotes.html secadv.data/CVE-2019-12400.asc secadv.html mailing-list
- [santuario-commits] 20210917 svn commit: r1076843 - in /websites/production/santuario/content: cache/main.pageCache index.html javaindex.html secadv.data/CVE-2021-40690.txt.asc secadv.html mailing-list