CVE-2023-38546

Name	CVE-2023-38546
Description	This flaw allows an attacker to insert cookies at will into a running program using libcurl, if the specific series of conditions are met. libcurl performs transfers. In its API, an application creates "easy handles" that are the individual handles for single transfers. libcurl provides a function call that duplicates en easy handle called [curl_easy_duphandle](https://curl.se/libcurl/c/curl_easy_duphandle.html). If a transfer has cookies enabled when the handle is duplicated, the cookie-enable state is also cloned - but without cloning the actual cookies. If the source handle did not read any cookies from a specific file on disk, the cloned version of the handle would instead store the file name as `none` (using the four ASCII letters, no quotes). Subsequent use of the cloned handle that does not explicitly set a source to load cookies from would then inadvertently load cookies from a file named `none` - if such a file exists and is readable in the current directory of the program using libcurl. And if using the correct file format of course.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-3613-1, DSA-5523-1

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+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	Origin
curl	source	buster	7.64.0-4+deb10u7	DLA-3613-1
curl	source	bullseye	7.74.0-1.3+deb11u10	DSA-5523-1
curl	source	bookworm	7.88.1-10+deb12u4	DSA-5523-1
curl	source	(unstable)	8.3.0-3

Notes

https://curl.se/docs/CVE-2023-38546.html
Introduced by: https://github.com/curl/curl/commit/74d5a6fb3b9a96d9fa51ba90996e94c878ebd151 (curl-7_9_1)
Fixed by: https://github.com/curl/curl/commit/61275672b46d9abb3285740467b882e22ed75da8 (curl-8_4_0)