CVE-2015-3455 · cross-distro fix matrix

CVE-2015-3455: Squid 3.2.x before 3.2.14, 3.3.x before 3.3.14, 3.4.x before 3.4.13, and 3.5.x before 3.5.4, when configured with client-first SSL-bump, do not properly validate the domain or hostname fields of X.509 certificates, which allows man-in-the-middle attackers to spoof SSL servers via a valid certificate

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

Fix per ecosystem

Each block below is a distro release where CVE-2015-3455 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

squid→ fixed in4.1-1urgency: unimportant

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

Debian bookworm

Source: Debian Security Tracker

squid→ fixed in4.1-1urgency: unimportant

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

Debian trixie

Source: Debian Security Tracker

squid→ fixed in4.1-1urgency: unimportant

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

Are YOU affected by CVE-2015-3455?

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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