| Name | CVE-2021-28651 |
| Description | An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Due to a buffer-management bug, it allows a denial of service. When resolving a request with the urn: scheme, the parser leaks a small amount of memory. However, there is an unspecified attack methodology that can easily trigger a large amount of memory consumption. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-2685-1, DSA-4924-1, ELA-442-1 |
| Debian Bugs | 988893 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| squid (PTS) | buster | 4.6-1+deb10u7 | fixed |
| buster (security) | 4.6-1+deb10u10 | fixed | |
| bullseye | 4.13-10+deb11u2 | fixed | |
| bullseye (security) | 4.13-10+deb11u3 | fixed | |
| bookworm | 5.7-2 | fixed | |
| bookworm (security) | 5.7-2+deb12u1 | fixed | |
| trixie | 6.6-1 | fixed | |
| sid | 6.9-1 | fixed | |
| squid3 (PTS) | jessie, jessie (lts) | 3.5.23-5+deb8u7 | fixed |
| stretch (security) | 3.5.23-5+deb9u7 | fixed | |
| stretch (lts), stretch | 3.5.23-5+deb9u10 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| squid | source | buster | 4.6-1+deb10u6 | DSA-4924-1 | ||
| squid | source | (unstable) | 4.13-10 | 988893 | ||
| squid3 | source | jessie | 3.5.23-5+deb8u4 | ELA-442-1 | ||
| squid3 | source | stretch | 3.5.23-5+deb9u7 | DLA-2685-1 | ||
| squid3 | source | (unstable) | (unfixed) |
https://github.com/squid-cache/squid/security/advisories/GHSA-ch36-9jhx-phm4
http://www.squid-cache.org/Versions/v4/changesets/squid-4-a975fd5aedc866629214aaaccb38376855351899.patch
https://megamansec.github.io/Squid-Security-Audit/urn-memleak.html