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    CVE-2018-0733

    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).

    Published:Mar 27, 2018
    Last Modified:Nov 21, 2024
    EPS:Mar 27, 2018
    EPSS Score:0.00584
    CVSS Score:5.9

    Affected Products

    Vendor
    Openssl
    Product
    Openssl

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-325 Missing Cryptographic Step

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-68 Subvert Code-signing Facilities

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    References

    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://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=56d5a4bfcaf37fa420aef2bb881aa55e61cf5f2f
    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
    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://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=56d5a4bfcaf37fa420aef2bb881aa55e61cf5f2f
    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
    https://www.tenable.com/security/tns-2018-04
    https://www.tenable.com/security/tns-2018-06
    https://www.tenable.com/security/tns-2018-07

    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