| Name | CVE-2021-20235 |
| Description | Heap overflow when receiving malformed ZMTP v1 packets |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| zeromq3 (PTS) | stretch | 4.2.1-4+deb9u2 | vulnerable |
| stretch (security) | 4.2.1-4+deb9u3 | vulnerable |
| buster, buster (security) | 4.3.1-4+deb10u2 | vulnerable |
| bullseye, sid | 4.3.4-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| zeromq3 | source | (unstable) | 4.3.3-1 | | | |
Notes
https://github.com/zeromq/libzmq/pull/3902
https://github.com/zeromq/libzmq/security/advisories/GHSA-fc3w-qxf5-7hp6
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=21984