Unknown · Gss-Ntlmssp · CVE-2023-25564
**Name of the Vulnerable Software and Affected Versions**
GSS-NTLMSSP versions prior to 1.2.0
**Description**
The issue is related to memory corruption that can be triggered when decoding UTF16 strings. The variable `outlen` was not initialized, which could cause writing a zero to an arbitrary place in memory if `ntlm str convert()` fails, leaving `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. The vulnerability can trigger an out-of-bounds write, leading to memory corruption, and can be triggered via the main `gss accept sec context` entry point.
**Recommendations**
For versions prior to 1.2.0, update to version 1.2.0 to resolve the issue. As a temporary workaround, consider restricting the use of the `gss accept sec context` entry point until a patch is available. Avoid using the `ntlm str convert()` function with untrusted input until the issue is resolved.