CVE-2018-0733

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    CVE-2018-0733

    Published: 27 Mar 2018Last Modified: 8 Jul 2026

    Summary:

    Details: Because of an implementation bug the PA-RISC CRYPTO_memcmp function is effectively reduced to only comparing the least significant bit of each byte. This allows an attacker to forge messages that would be considered as authenticated in an amount of tries lower than that guaranteed by the security claims of the scheme. The module can only be compiled by the HP-UX assembler, so that only HP-UX PA-RISC targets are affected. Fixed in OpenSSL 1.1.0h (Affected 1.1.0-1.1.0g).

    References: https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=56d5a4bfcaf37fa420aef2bb881aa55e61cf5f2f, https://www.tenable.com/security/tns-2018-04, https://www.tenable.com/security/tns-2018-06, https://www.tenable.com/security/tns-2018-07, http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html, http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html, http://www.securityfocus.com/bid/103517, http://www.securitytracker.com/id/1040576, https://security.gentoo.org/glsa/201811-21, https://security.netapp.com/advisory/ntap-20180330-0002/, https://www.openssl.org/news/secadv/20180327.txt, https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html, https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html, https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 7ea5bd2b52d0e81eaef3d109b3b12545306f201c
    Fixed -None

    Affected versions

    OpenSSL_1_1_0l

    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