CVE-2022-43552

NameCVE-2022-43552
DescriptionA use after free vulnerability exists in curl <7.87.0. Curl can be asked to *tunnel* virtually all protocols it supports through an HTTP proxy. HTTP proxies can (and often do) deny such tunnel operations. When getting denied to tunnel the specific protocols SMB or TELNET, curl would use a heap-allocated struct after it had been freed, in its transfer shutdown code path.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-3288-1, DSA-5330-1
Debian Bugs1026830

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
curl (PTS)buster7.64.0-4+deb10u2vulnerable
buster (security)7.64.0-4+deb10u8fixed
bullseye (security), bullseye7.74.0-1.3+deb11u11fixed
bookworm, bookworm (security)7.88.1-10+deb12u5fixed
trixie8.5.0-2fixed
sid8.6.0-3fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
curlsourcebuster7.64.0-4+deb10u4DLA-3288-1
curlsourcebullseye7.74.0-1.3+deb11u5DSA-5330-1
curlsource(unstable)7.86.0-31026830

Notes

https://curl.se/docs/CVE-2022-43552.html
Introduced by (telnet): https://github.com/curl/curl/commit/b7eeb6e67fca686f840eacd6b8394edb58b07482 (curl-7_16_0)
Introduced by (smb): https://github.com/curl/curl/commit/aec2e865f06669b9cb5d26cc1148d70bc418b163 (curl-7_40_0)
Fixed by: https://github.com/curl/curl/commit/4f20188ac644afe174be6005ef4f6ffba232b8b2 (curl-7_87_0)

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