A buffer over-read was discovered in libntlmauth in Squid 2.5 through 5.6. Due to incorrect integer-overflow protection, the SSPI and SMB authentication helpers are vulnerable to reading unintended memory locations. In some configurations, cleartext credentials from these locations are sent to a client. This is fixed in 5.7.
The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
| Link | Tags |
|---|---|
| https://github.com/squid-cache/squid/security/advisories/GHSA-394c-rr7q-6g78 | third party advisory patch |
| http://www.squid-cache.org/Versions/v4/changesets/SQUID-2022_2.patch | third party advisory patch |
| http://www.squid-cache.org/Versions/v5/changesets/SQUID-2022_2.patch | third party advisory patch |
| https://www.openwall.com/lists/oss-security/2022/09/23/2 | mailing list third party advisory patch |