| Name | CVE-2021-22945 |
| Description | When sending data to an MQTT server, libcurl <= 7.73.0 and 7.78.0 could in some circumstances erroneously keep a pointer to an already freed memory area and both use that again in a subsequent call to send data and also free it *again*. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-5197-1 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| curl (PTS) | buster | 7.64.0-4+deb10u2 | fixed |
| buster (security) | 7.64.0-4+deb10u9 | fixed |
| bullseye (security), bullseye | 7.74.0-1.3+deb11u11 | fixed |
| bookworm, bookworm (security) | 7.88.1-10+deb12u5 | fixed |
| sid, trixie | 8.7.1-3 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| curl | source | stretch | (not affected) | | | |
| curl | source | buster | (not affected) | | | |
| curl | source | bullseye | 7.74.0-1.3+deb11u2 | | DSA-5197-1 | |
| curl | source | (unstable) | 7.79.1-1 | | | |
Notes
[buster] - curl <not-affected> (Vulnerable code introduced later)
[stretch] - curl <not-affected> (Vulnerable code introduced later)
https://curl.se/docs/CVE-2021-22945.html
Fixed by: https://github.com/curl/curl/commit/43157490a5054bd24256fe12876931e8abc9df49 (curl-7_79_0)