{"cve":"CVE-2011-2516","nvd":{"published":"2011-07-11T20:55:01.380","modified":"2026-06-16T23:31:29.877","status":"Modified","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.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-189"],"references":["http://lists.fedoraproject.org/pipermail/package-announce/2011-July/063159.html","http://lists.fedoraproject.org/pipermail/package-announce/2011-July/063229.html","http://santuario.apache.org/secadv/CVE-2011-2516.txt","http://secunia.com/advisories/45151","http://secunia.com/advisories/45191"],"products":["apache:xml_security_for_c\\+\\+","shibboleth:shibboleth-sp"],"source":"nvd","synced_at":"2026-10-19T19:58:50.521460154+00:00"},"epss":{"cve":"CVE-2011-2516","score":0.0772,"percentile":0.94617,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}