CVE-2023-25564 (gss-ntlmssp)

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 …

application authentication corruption cve decoding denial of service fail library memory memory corruption ntlm ntlm authentication ntlmssp plugin service space strings variable version version 1 writing