|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, 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.
|buster, buster (security)||7.64.0-4+deb10u2||fixed|
|bookworm, sid, bullseye||7.74.0-1.3||vulnerable|
The information below is based on the following data on fixed versions.
|Package||Type||Release||Fixed Version||Urgency||Origin||Debian Bugs|
[bullseye] - curl <no-dsa> (Minor issue)
[buster] - curl <not-affected> (Vulnerable code introduced later)
[stretch] - curl <not-affected> (Vulnerable code introduced later)
Fixed by: https://github.com/curl/curl/commit/43157490a5054bd24256fe12876931e8abc9df49 (curl-7_79_0)