USN-7942-2: GLib vulnerabilities

USN-7942-1 fixed vulnerabilities in GLib. This update provides the
corresponding updates for Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04
LTS, and Ubuntu 20.04 LTS. CVE-2025-3360 only affected Ubuntu 18.04
LTS and Ubuntu 20.04 LTS.

Original advisory details:

It was discovered that GLib incorrectly handled escaping URI strings. An
attacker could use this issue to cause GLib to crash, resulting in a
denial of service, or possibly execute arbitrary code. (CVE-2025-13601)

It was discovered that GLib incorrectly parsed certain GVariants. An
attacker could use this issue to cause GLib to crash, resulting in a
denial of service, or possibly execute arbitrary code. (CVE-2025-14087)

It was discovered that GLib incorrectly parsed certain long invalid ISO
8601 timestamps. An attacker could possibly use this issue to cause GLib
to crash, resulting in a denial of service. This issue only affected
Ubuntu 22.04 LTS and Ubuntu 24.04 LTS. (CVE-2025-3360)

It was discovered that GLib incorrectly handled GString memory operations.
An attacker could use this issue to cause GLib to crash, resulting in a
denial of service, or possibly execute arbitrary code. This issue only
affected Ubuntu 24.04 LTS and Ubuntu 25.04. (CVE-2025-6052)

It was discovered that GLib incorrectly handled creating temporary files.
An attacker could possibly use this issue to access unauthorized data.
This issue only affected Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu
25.04. (CVE-2025-7039)