Ubuntu Python-Apt vulnerabilities

CVE-2025-6966 [MEDIUM] CWE-476 CVE-2025-6966: NULL pointer dereference in TagSection.keys() in python-apt on APT-based Linux systems allows a loca NULL pointer dereference in TagSection.keys() in python-apt on APT-based Linux systems allows a local attacker to cause a denial of service (process crash) via a crafted deb822 file with a malformed non-UTF-8 key.

CVE-2019-15795 [MEDIUM] CWE-327 CVE-2019-15795: python-apt only checks the MD5 sums of downloaded files in `Version.fetch_binary()` and `Version.fet python-apt only checks the MD5 sums of downloaded files in `Version.fetch_binary()` and `Version.fetch_source()` of apt/package.py in version 1.9.0ubuntu1 and earlier. This allows a man-in-the-middle attack which could potentially be used to install altered packages and has been fixed in versions 1.9.0ubuntu1.2, 1.6.5ubuntu0.1, 1.1.0~beta1ubuntu0.16

CVE-2019-15796 [MEDIUM] CWE-287 CVE-2019-15796: Python-apt doesn't check if hashes are signed in `Version.fetch_binary()` and `Version.fetch_source( Python-apt doesn't check if hashes are signed in `Version.fetch_binary()` and `Version.fetch_source()` of apt/package.py or in `_fetch_archives()` of apt/cache.py in version 1.9.3ubuntu2 and earlier. This allows downloads from unsigned repositories which shouldn't be allowed and has been fixed in verisions 1.9.5, 1.9.0ubuntu1.2, 1.6.5ubuntu0.1, 1.1.