CVE-2023-25565
Prior to version 1.2.0, an incorrect free when decoding target information can trigger a denial of service.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.10%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 1.10% probability · 64th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-590, CWE-763
- Affected
- gss-ntlmssp project/gss-ntlmssp
- Source
- security-advisories@github.com
References
- https://github.com/gssapi/gss-ntlmssp/commit/c16100f60907a2de92bcb676f303b81facee0f64Patch, Third Party Advisory
- https://github.com/gssapi/gss-ntlmssp/releases/tag/v1.2.0Third Party Advisory
- https://github.com/gssapi/gss-ntlmssp/security/advisories/GHSA-7q7f-wqcg-mvfgThird Party Advisory
- https://github.com/gssapi/gss-ntlmssp/commit/c16100f60907a2de92bcb676f303b81facee0f64Patch, Third Party Advisory
- https://github.com/gssapi/gss-ntlmssp/releases/tag/v1.2.0Third Party Advisory
- https://github.com/gssapi/gss-ntlmssp/security/advisories/GHSA-7q7f-wqcg-mvfgThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.