Bug#1106205: libsoup3: CVE-2025-4945

[Salvatore Bonaccorso]

Source: libsoup3
Version: 3.6.5-1
Severity: important
Tags: security upstream
Forwarded: https://gitlab.gnome.org/GNOME/libsoup/-/issues/448
X-Debbugs-Cc: carnil at debian.org, Debian Security Team <team at security.debian.org>

Hi,

The following vulnerability was published for libsoup3.

CVE-2025-4945[0]:
| A flaw was found in the cookie parsing logic of the libsoup HTTP
| library, used in GNOME applications and other software. The
| vulnerability arises when processing the expiration date of cookies,
| where a specially crafted value can trigger an integer overflow.
| This may result in undefined behavior, allowing an attacker to
| bypass cookie expiration logic, causing persistent or unintended
| cookie behavior. The issue stems from improper validation of large
| integer inputs during date arithmetic operations within the cookie
| parsing routines.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2025-4945
    https://www.cve.org/CVERecord?id=CVE-2025-4945
[1] https://gitlab.gnome.org/GNOME/libsoup/-/issues/448

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore