An issue was discovered in Squid 3.3.9 through 3.5.28 and 4.x through 4.7. When Squid is configured to use Digest authentication, it parses the header Proxy-Authorization. It searches for certain tokens such as domain, uri, and qop. Squid checks if this token's value starts with a quote and ends with one. If so, it performs a memcpy of its length minus 2. Squid never checks whether the value is just a single quote (which would satisfy its requirements), leading to a memcpy of its length minus 1.
Platform | Package | Release Date | Advisory |
---|---|---|---|
Amazon Linux 1 | squid | 2020-06-23 06:08 | ALAS-2020-1386 |
Amazon Linux 1 | squid | 2020-06-01 12:25 | ALAS-2020-1378 |
Amazon Linux 2 - Core | squid | 2020-06-26 22:56 | ALAS2-2020-1448 |
Amazon Linux 2 - Squid4 Extra | squid | 2023-08-21 20:59 | ALAS2SQUID4-2023-008 |
Amazon Linux 2 - Squid4 Extra | squid | 2023-08-21 20:59 | ALAS2SQUID4-2023-007 |
Score Type | Score | Vector | |
---|---|---|---|
Amazon Linux | CVSSv3 | 4.3 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
NVD | CVSSv3 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
NVD | CVSSv2 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |