CVE-2023-38546

NameCVE-2023-38546
DescriptionThis 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-3613-1, DSA-5523-1

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+deb10u9fixed
bullseye (security), bullseye7.74.0-1.3+deb11u11fixed
bookworm, bookworm (security)7.88.1-10+deb12u5fixed
sid, trixie8.8.0-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
curlsourcebuster7.64.0-4+deb10u7DLA-3613-1
curlsourcebullseye7.74.0-1.3+deb11u10DSA-5523-1
curlsourcebookworm7.88.1-10+deb12u4DSA-5523-1
curlsource(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)

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