CVE-2023-25564

    Dashboard / Vulnerabilities / CVE-2023-25564

    CVE-2023-25564

    Published: 14 Feb 2023Last Modified: 28 Oct 2026

    Summary: GSS-NTLMSSP vulnerable to memory corruption when decoding UTF16 strings

    Details: GSS-NTLMSSP is a mechglue plugin for the GSSAPI library that implements NTLM authentication. Prior to version 1.2.0, memory corruption can be triggered when decoding UTF16 strings. The variable `outlen` was not initialized and could cause writing a zero to an arbitrary place in memory if `ntlm_str_convert()` were to fail, which would leave `outlen` uninitialized. This can lead to a denial of service if the write hits unmapped memory or randomly corrupts a byte in the application memory space. This vulnerability can trigger an out-of-bounds write, leading to memory corruption. This vulnerability can be triggered via the main `gss_accept_sec_context` entry point. This issue is fixed in version 1.2.0.

    References: https://github.com/gssapi/gss-ntlmssp/releases/tag/v1.2.0, https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/25xxx/CVE-2023-25564.json, https://github.com/gssapi/gss-ntlmssp/security/advisories/GHSA-r85x-q5px-9xfq, https://nvd.nist.gov/vuln/detail/CVE-2023-25564, https://github.com/gssapi/gss-ntlmssp/commit/c753000eb31835c0664e528fbc99378ae0cbe950

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -3c3077e2a24b47db1b4c459fb3173ba7f75b9b44

    Affected versions

    v1.1.0

    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
    CVE-2023-25564 | CVE-DB