CVE-2009-0758 · cross-distro fix matrix

CVE-2009-0758: The originates_from_local_legacy_unicast_socket function in avahi-core/server.c in avahi-daemon 0.6.23 does not account for the network byte order of a port number when processing incoming multicast packets, which allows remote attackers to cause a denial of service (network bandwidth and CPU consum

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

Fix per ecosystem

Each block below is a distro release where CVE-2009-0758 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

avahi→ fixed in0.6.24-3urgency: low

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

Debian bookworm

Source: Debian Security Tracker

avahi→ fixed in0.6.24-3urgency: low

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

Debian trixie

Source: Debian Security Tracker

avahi→ fixed in0.6.24-3urgency: low

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

Are YOU affected by CVE-2009-0758?

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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