{"cve":"CVE-2009-4355","nvd":{"published":"2010-01-14T19:30:00.390","modified":"2026-06-16T23:13:30.543","status":"Modified","description":"Memory leak in the zlib_stateful_finish function in crypto/comp/c_zlib.c in OpenSSL 0.9.8l and earlier and 1.0.0 Beta through Beta 4 allows remote attackers to cause a denial of service (memory consumption) via vectors that trigger incorrect calls to the CRYPTO_cleanup_all_ex_data function, as demonstrated by use of SSLv3 and PHP with the Apache HTTP Server, a related issue to CVE-2008-1678.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-399"],"references":["http://cvs.openssl.org/chngview?cn=19068","http://cvs.openssl.org/chngview?cn=19069","http://cvs.openssl.org/chngview?cn=19167","http://lists.fedoraproject.org/pipermail/package-announce/2010-April/038587.html","http://lists.fedoraproject.org/pipermail/package-announce/2010-April/039561.html"],"products":["openssl:openssl","redhat:openssl"],"source":"nvd","synced_at":"2026-10-19T19:55:32.599380760+00:00"},"epss":{"cve":"CVE-2009-4355","score":0.09184,"percentile":0.9533,"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."]}