| Name | CVE-2021-45956 |
| Description | Dnsmasq 2.86 has a heap-based buffer overflow in print_mac (called from log_packet and dhcp_reply). NOTE: the vendor's position is that CVE-2021-45951 through CVE-2021-45957 "do not represent real vulnerabilities, to the best of our knowledge. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| dnsmasq (PTS) | jessie, jessie (lts) | 2.72-3+deb8u7 | vulnerable |
| stretch (security) | 2.76-5+deb9u3 | vulnerable |
| stretch (lts), stretch | 2.76-5+deb9u4 | vulnerable |
| buster, buster (lts) | 2.80-1+deb10u2 | vulnerable |
| buster (security) | 2.80-1+deb10u1 | vulnerable |
| bullseye | 2.85-1 | vulnerable |
| bookworm | 2.89-1 | vulnerable |
| sid, trixie | 2.90-4 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| dnsmasq | source | (unstable) | (unfixed) | unimportant | | |
Notes
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35887
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/dnsmasq/OSV-2021-933.yaml
Non issue, result of poorly automated fuzzing effort