| Name | CVE-2021-44847 |
| Description | A stack-based buffer overflow in handle_request function in DHT.c in toxcore 0.1.9 through 0.1.11 and 0.2.0 through 0.2.12 (caused by an improper length calculation during the handling of received network packets) allows remote attackers to crash the process or potentially execute arbitrary code via a network packet. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1001711 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| libtoxcore (PTS) | bullseye | 0.2.12-1 | vulnerable |
| bookworm | 0.2.18-1 | fixed |
| sid, trixie | 0.2.19-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| libtoxcore | source | (unstable) | 0.2.13-1 | | | 1001711 |
Notes
[bullseye] - libtoxcore <no-dsa> (Minor issue)
[buster] - libtoxcore <no-dsa> (Minor issue)
https://github.com/TokTok/c-toxcore/pull/1718
https://blog.tox.chat/2021/12/stack-based-buffer-overflow-vulnerability-in-udp-packet-handling-in-toxcore-cve-2021-44847/
Introduced by: https://github.com/TokTok/c-toxcore/commit/71260e38e8d12547b0e55916daf6cadd72f52e19 (v0.1.9)
Fixed by: https://github.com/TokTok/c-toxcore/commit/1b02bad36864fdfc36694e3f96d2dc6c58a891e4 (v0.2.13)