| Name | CVE-2025-4035 |
| Description | A flaw was found in libsoup. When handling cookies, libsoup clients mistakenly allow cookies to be set for public suffix domains if the domain contains at least two components and includes an uppercase character. This bypasses public suffix protections and could allow a malicious website to set cookies for domains it does not own, potentially leading to integrity issues such as session fixation. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1104414, 1104415 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| libsoup2.4 (PTS) | bullseye | 2.72.0-2 | vulnerable |
| bullseye (security) | 2.72.0-2+deb11u2 | vulnerable |
| bookworm | 2.74.3-1+deb12u1 | vulnerable |
| forky, sid, trixie | 2.74.3-10.1 | vulnerable |
| libsoup3 (PTS) | bookworm | 3.2.3-0+deb12u2 | vulnerable |
| trixie | 3.6.5-3 | vulnerable |
| forky, sid | 3.6.5-4 | vulnerable |
The information below is based on the following data on fixed versions.
Notes
[trixie] - libsoup3 <no-dsa> (Minor issue)
[bookworm] - libsoup3 <no-dsa> (Minor issue)
[trixie] - libsoup2.4 <no-dsa> (Minor issue)
[bookworm] - libsoup2.4 <no-dsa> (Minor issue)
https://bugzilla.redhat.com/show_bug.cgi?id=2362651
https://gitlab.gnome.org/GNOME/libsoup/-/issues/443
https://gitlab.gnome.org/GNOME/libsoup/-/merge_requests/448