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.
CVSS Details
- CVSS 3.1 Base Score: 6.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade gssntlmssp | May 23, 2023 | Feb 14, 2023 |
| Centos_linux | — | Upgrade gssntlmssp-debugsourceUpgrade gssntlmsspUpgrade gssntlmssp-debuginfo | May 17, 2023 | Feb 14, 2023 |
| Debian | — | Upgrade gss-ntlmssp | Jul 30, 2024 | Feb 14, 2023 |
| Oracle_linux | — | Upgrade gssntlmssp | May 25, 2023 | Feb 14, 2023 |
| Redhat_linux | — | Upgrade gssntlmssp-debuginfoUpgrade gssntlmssp-debugsourceUpgrade gssntlmssp | May 17, 2023 | Feb 14, 2023 |
| Suse | — | Upgrade gssntlmssp-develUpgrade gssntlmssp | Feb 21, 2023 | Feb 14, 2023 |
| Ubuntu | — | Upgrade gss-ntlmssp (Ubuntu Pro) | Jun 26, 2025 | Feb 14, 2023 |
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