CVE-2020-15810
Description
An issue was discovered in Squid before 4.13 and 5.x before 5.0.4. Due to incorrect data validation, HTTP Request Smuggling attacks may succeed against HTTP and HTTPS traffic. This leads to cache poisoning. This allows any client, including browser scripts, to bypass local security and poison the proxy cache and any downstream caches with content from an arbitrary source. When configured for relaxed header parsing (the default), Squid relays headers containing whitespace characters to upstream servers. When this occurs as a prefix to a Content-Length header, the frame length specified will be ignored by Squid (allowing for a conflicting length to be used from another Content-Length header) but relayed upstream.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2020-15810
Vendor advisory: rocky — https://errata.rockylinux.org/RLSA-2020:3623
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2020-15810.html
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| rocky | 8 | fixed | |
| debian | bookworm | fixed | 4.13-1 |
| debian | bullseye | fixed | 4.13-1 |
| debian | forky | fixed | 4.13-1 |
| debian | sid | fixed | 4.13-1 |
| debian | trixie | fixed | 4.13-1 |
References
Verify integrity in audit chain (admin only). AS-IS.