CVE-2023-25565 GSS-NTLMSSP vulnerable to incorrect free when decoding target information

2023-02-1417:35:41

CWE-590

GitHub_M

www.cve.org

gss-ntlmssp

ntlm authentication

buffer

denial-of-service

vulnerability

gssapi

authentication

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

AI Score

7.6

Confidence

High

EPSS

0.001

Percentile

45.8%

JSON

GSS-NTLMSSP is a mechglue plugin for the GSSAPI library that implements NTLM authentication. Prior to version 1.2.0, an incorrect free when decoding target information can trigger a denial of service. The error condition incorrectly assumes the cb and sh buffers contain a copy of the data that needs to be freed. However, that is not the case. This vulnerability can be triggered via the main gss_accept_sec_context entry point. This will likely trigger an assertion failure in free, causing a denial-of-service. This issue is fixed in version 1.2.0.

CNA Affected

[
  {
    "vendor": "gssapi",
    "product": "gss-ntlmssp",
    "versions": [
      {
        "version": "< 1.2.0",
        "status": "affected"
      }
    ]
  }
]