Description
An issue was discovered in Squid 5.0.6 through 5.1.x before 5.2. When validating an origin server or peer certificate, Squid may incorrectly classify certain certificates as trusted. This problem allows a remote server to obtain security trust well improperly. This indication of trust may be passed along to clients, allowing access to unsafe or hijacked services.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | squid | 5.2-1 | — |
| Debian 13 | squid | 5.2-1 | — |
| Debian 12 | squid | 5.2-1 | — |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | squid | 5.2-r0 | — |
| Alpine v3.23 | squid | 5.2-r0 | — |
| Alpine v3.22 | squid | 5.2-r0 | — |
| Alpine v3.21 | squid | 5.2-r0 | — |
| Alpine v3.20 | squid | 5.2-r0 | — |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | squid | 5.2-r0 | — |
| Alpine v3.18 | squid | 5.2-r0 | — |
| Alpine v3.17 | squid | 5.2-r0 | — |
| Alpine v3.16 | squid | 5.2-r0 | — |
| Alpine v3.15 | squid | 5.2-r0 | — |
| Alpine v3.14 | squid | 5.0.6-r2 | — |
| Alpine v3.13 | squid | 5.0.6-r2 | — |
References
- http://www.squid-cache.org/Versions/v6/changesets/squid-6-43d6b5c81b88ec2256b430c69a872a1e4f324e4a.patch
- https://github.com/squid-cache/squid/security/advisories/GHSA-47m4-g3mv-9q5r
- FEDORA-2021-15d2f70a07 vendor-advisory
- [oss-security] 20211223 CVE-2021-44273: e2guardian did not validate TLS hostnames mailing-list