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    CVE-2009-4355

    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.

    Published:Jan 13, 2010
    Last Modified:Apr 23, 2026
    EPS:Jan 14, 2010
    EPSS Score:0.20241
    CVSS Score:5

    Affected Products

    Vendor
    Openssl
    Product
    Openssl
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Openssl

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    CVE-2026-63072 (CVSS 7.5) — Issue summary: OpenSSL CMS decryption sizes the key-unwrap output buffer based on querying the unwrapped key s…
    CVE-2026-54874 (CVSS 7.5) — Issue summary: Receiving a DTLS record for a future epoch while a handshake is in progress causes OpenSSL to b…
    CVE-2026-14457 (CVSS 7.5) — Issue summary: In a server or client configuration with RFC7250 Raw Public Keys (RPKs) enabled, and only the p…
    CVE-2026-63076 (CVSS 7.5) — Issue summary: OpenSSL CMP password based protection verification only checks whether the protectionAlg parame…
    CVE-2026-63074 (CVSS 5.9) — Issue summary: The OpenSSL Certificate Management Protocol (CMP) caches additional certificates (extraCerts) s…
    CVE-2026-63073 (CVSS 9.8) — Issue summary: OpenSSL CMP response validation passed an unexpected response sender distinguished name directl…
    CVE-2026-18798 (CVSS 7.5) — Issue summary: QUIC server may double free QRX (QUIC record layer RX) object when channel creation fails for i…
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    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
    http://lists.opensuse.org/opensuse-security-announce/2010-01/msg00009.html
    http://marc.info/?l=bugtraq&m=127128920008563&w=2
    http://secunia.com/advisories/38175
    http://secunia.com/advisories/38181
    http://secunia.com/advisories/38200
    http://secunia.com/advisories/38761
    http://secunia.com/advisories/39461
    http://secunia.com/advisories/42724
    http://secunia.com/advisories/42733
    http://slackware.com/security/viewer.php?l=slackware-security&y=2010&m=slackware-security.663049
    http://wiki.rpath.com/wiki/Advisories:rPSA-2010-0004
    http://www.debian.org/security/2010/dsa-1970
    http://www.mandriva.com/security/advisories?name=MDVSA-2010:022
    http://www.openwall.com/lists/oss-security/2010/01/13/3
    http://www.ubuntu.com/usn/USN-884-1
    http://www.vupen.com/english/advisories/2010/0124
    http://www.vupen.com/english/advisories/2010/0839
    http://www.vupen.com/english/advisories/2010/0916
    https://bugzilla.redhat.com/show_bug.cgi?id=546707
    https://issues.rpath.com/browse/RPL-3157
    https://kb.bluecoat.com/index?page=content&id=SA50
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11260
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12168
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6678
    https://rhn.redhat.com/errata/RHSA-2010-0095.html
    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
    http://lists.opensuse.org/opensuse-security-announce/2010-01/msg00009.html
    http://marc.info/?l=bugtraq&m=127128920008563&w=2
    http://secunia.com/advisories/38175
    http://secunia.com/advisories/38181
    http://secunia.com/advisories/38200
    http://secunia.com/advisories/38761
    http://secunia.com/advisories/39461
    http://secunia.com/advisories/42724
    http://secunia.com/advisories/42733
    http://slackware.com/security/viewer.php?l=slackware-security&y=2010&m=slackware-security.663049
    http://wiki.rpath.com/wiki/Advisories:rPSA-2010-0004
    http://www.debian.org/security/2010/dsa-1970
    http://www.mandriva.com/security/advisories?name=MDVSA-2010:022
    http://www.openwall.com/lists/oss-security/2010/01/13/3
    http://www.ubuntu.com/usn/USN-884-1
    http://www.vupen.com/english/advisories/2010/0124
    http://www.vupen.com/english/advisories/2010/0839
    http://www.vupen.com/english/advisories/2010/0916
    https://bugzilla.redhat.com/show_bug.cgi?id=546707
    https://issues.rpath.com/browse/RPL-3157
    https://kb.bluecoat.com/index?page=content&id=SA50
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11260
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12168
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6678
    https://rhn.redhat.com/errata/RHSA-2010-0095.html

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High