| Name | CVE-2021-20234 |
| Description | An uncontrolled resource consumption (memory leak) flaw was found in the ZeroMQ client in versions before 4.3.3 in src/pipe.cpp. This issue causes a client that connects to multiple malicious or compromised servers to crash. The highest threat from this vulnerability is to system availability. |
| 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-2588-1, ELA-1184-1, ELA-388-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| zeromq3 (PTS) | jessie, jessie (lts) | 4.0.5+dfsg-2+deb8u4 | fixed |
| stretch (security), stretch (lts), stretch | 4.2.1-4+deb9u4 | fixed | |
| buster, buster (lts) | 4.3.1-4+deb10u3 | fixed | |
| buster (security) | 4.3.1-4+deb10u2 | vulnerable | |
| bullseye | 4.3.4-1+deb11u1 | fixed | |
| bookworm | 4.3.4-6 | fixed | |
| sid, trixie | 4.3.5-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| zeromq3 | source | jessie | 4.0.5+dfsg-2+deb8u4 | ELA-388-1 | ||
| zeromq3 | source | stretch | 4.2.1-4+deb9u4 | DLA-2588-1 | ||
| zeromq3 | source | buster | 4.3.1-4+deb10u3 | ELA-1184-1 | ||
| zeromq3 | source | (unstable) | 4.3.3-1 |
[buster] - zeromq3 <no-dsa> (Minor issue)
https://github.com/zeromq/libzmq/pull/3918
https://github.com/zeromq/libzmq/security/advisories/GHSA-wfr2-29gj-5w87
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=22037
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=22123