CVE-2013-4351 · cross-distro fix matrix

CVE-2013-4351: GnuPG 1.4.x, 2.0.x, and 2.1.x treats a key flags subpacket with all bits cleared (no usage permitted) as if it has all bits set (all usage permitted), which might allow remote attackers to bypass intended cryptographic protection mechanisms by leveraging the subkey.

Affects 3 Linux releases across 3 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2013-4351 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

gnupg2→ fixed in2.0.22-1urgency: low

sudo apt-get install --only-upgrade -y gnupg2

Debian bookworm

Source: Debian Security Tracker

gnupg2→ fixed in2.0.22-1urgency: low

sudo apt-get install --only-upgrade -y gnupg2

Debian trixie

Source: Debian Security Tracker

gnupg2→ fixed in2.0.22-1urgency: low

sudo apt-get install --only-upgrade -y gnupg2

Are YOU affected by CVE-2013-4351?

5-second check on your actual server. Reads /etc/os-release, uname -r, and the distro's package manager; matches against this same cross-source index live.

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