CVE-2020-12823 · cross-distro fix matrix

CVE-2020-12823: OpenConnect 8.09 has a buffer overflow, causing a denial of service (application crash) or possibly unspecified other impact, via crafted certificate data to get_cert_name in gnutls.c.

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

Fix per ecosystem

Each block below is a distro release where CVE-2020-12823 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

openconnect→ fixed in8.10-1urgency: unimportant

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

Debian bookworm

Source: Debian Security Tracker

openconnect→ fixed in8.10-1urgency: unimportant

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

Debian trixie

Source: Debian Security Tracker

openconnect→ fixed in8.10-1urgency: unimportant

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

Are YOU affected by CVE-2020-12823?

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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