Impact: Moderate Public Date: 2019-07-12 CWE: CWE-119 Bugzilla: 1730535: CVE-2019-12525 squid: parsing of header Proxy-Authentication leads to memory corruption 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.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2019-12525 from the MITRE CVE dictionary dictionary and NIST NVD.
NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.
| CVSS3 Base Score | 7.3 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L |
| Attack Vector | Network |
| Attack Complexity | Low |
| Privileges Required | None |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality | Low |
| Integrity Impact | Low |
| Availability Impact | Low |
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux 8 | squid | Under investigation |
| Red Hat Enterprise Linux 7 | squid | Under investigation |
| Red Hat Enterprise Linux 6 | squid | Under investigation |
| Red Hat Enterprise Linux 5 | squid | Under investigation |
Vulmon