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    CVE-2011-1945

    The elliptic curve cryptography (ECC) subsystem in OpenSSL 1.0.0d and earlier, when the Elliptic Curve Digital Signature Algorithm (ECDSA) is used for the ECDHE_ECDSA cipher suite, does not properly implement curves over binary fields, which makes it easier for context-dependent attackers to determine private keys via a timing attack and a lattice calculation.

    Published:May 17, 2011
    Last Modified:Apr 11, 2025
    EPS:May 31, 2011
    EPSS Score:0.04941
    CVSS Score:2.6

    Affected Products

    Vendor
    Openssl
    Product
    Openssl

    Exploits

    http://eprint.iacr.org/2011/232.pdfhttp://eprint.iacr.org/2011/232.pdf

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

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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…
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    References

    http://eprint.iacr.org/2011/232.pdf
    http://lists.apple.com/archives/security-announce/2013/Jun/msg00000.html
    http://secunia.com/advisories/44935
    http://support.apple.com/kb/HT5784
    http://www.debian.org/security/2011/dsa-2309
    http://www.kb.cert.org/vuls/id/536044
    http://www.kb.cert.org/vuls/id/MAPG-8FENZ3
    http://www.mandriva.com/security/advisories?name=MDVSA-2011:136
    http://www.mandriva.com/security/advisories?name=MDVSA-2011:137
    https://hermes.opensuse.org/messages/8760466
    https://hermes.opensuse.org/messages/8764170
    http://eprint.iacr.org/2011/232.pdf
    http://lists.apple.com/archives/security-announce/2013/Jun/msg00000.html
    http://secunia.com/advisories/44935
    http://support.apple.com/kb/HT5784
    http://www.debian.org/security/2011/dsa-2309
    http://www.kb.cert.org/vuls/id/536044
    http://www.kb.cert.org/vuls/id/MAPG-8FENZ3
    http://www.mandriva.com/security/advisories?name=MDVSA-2011:136
    http://www.mandriva.com/security/advisories?name=MDVSA-2011:137
    https://hermes.opensuse.org/messages/8760466
    https://hermes.opensuse.org/messages/8764170

    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