CVE-2019-12525
Critical
Description
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.
SeverityCritical
CVSS9.8
Exploit probability—
Product
Squid
PublishedJul 11, 2019
First seenJul 11, 2019
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| squid-cache squid | 3.3.9 ≤ v ≤ 3.5.28, 4.0 ≤ v ≤ 4.7 | — |
| debian debian_linux | 8.0, 9.0, 10.0 | — |
| opensuse leap | 15.0, 15.1 | — |
| fedoraproject fedora | 29 | — |
| canonical ubuntu_linux | 12.04, 16.04, 18.04, 19.04 | — |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.