CVE-2023-27536

Name	CVE-2023-27536
Description	An authentication bypass vulnerability exists libcurl <8.0.0 in the connection reuse feature which can reuse previously established connections with incorrect user permissions due to a failure to check for changes in the CURLOPT_GSSAPI_DELEGATION option. This vulnerability affects krb5/kerberos/negotiate/GSSAPI transfers and could potentially result in unauthorized access to sensitive information. The safest option is to not reuse connections if the CURLOPT_GSSAPI_DELEGATION option has been changed.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)
References	DLA-3398-1

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	vulnerable
	buster (security)	7.64.0-4+deb10u6	fixed
	bullseye (security), bullseye	7.74.0-1.3+deb11u7	vulnerable
	bookworm, sid	7.88.1-10	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
curl	source	buster	7.64.0-4+deb10u6		DLA-3398-1
curl	source	(unstable)	7.88.1-7

Notes

[bullseye] - curl <no-dsa> (Minor issue)
https://curl.se/docs/CVE-2023-27536.html
Introduced by: https://github.com/curl/curl/commit/ebf42c4be76df40ec6d3bf32f229bbb274e2c32f (curl-7_22_0)
Fixed by: https://github.com/curl/curl/commit/cb49e67303dbafbab1cebf4086e3ec15b7d56ee5 (curl-8_0_0)