CVE-2020-5202 Information disclosure in n/a
Local attackers can hijack a hardcoded TCP port to intercept sensitive data from apt-cacher-ng administrative requests, exposing credentials or configuration details.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-5202?
CVE-2020-5202 is a medium-severity vulnerability in Debian Debian Linux, published on 21 Jan 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
apt-cacher-ng through 3.3 allows local users to obtain sensitive information by hijacking the hardcoded TCP port. The /usr/lib/apt-cacher-ng/acngtool program attempts to connect to apt-cacher-ng via TCP on localhost port 3142, even if the explicit SocketPath=/var/run/apt-cacher-ng/socket command-line option is passed. The cron job /etc/cron.daily/apt-cacher-ng (which is active by default) attempts this periodically. Because 3142 is an unprivileged port, any local user can try to bind to this port and will receive requests from acngtool. There can be sensitive data in these requests, e.g., if AdminAuth is enabled in /etc/apt-cacher-ng/security.conf. This sensitive data can leak to unprivileged local users that manage to bind to this port before the apt-cacher-ng daemon can.
Which versions are affected by CVE-2020-5202?
It affects 4 products.
Products include Apt-Cacher-Ng Project Apt-Cacher-Ng, Debian Debian Linux, Opensuse Backports, Opensuse Leap.
How do I fix CVE-2020-5202?
Apply the vendor's patch.
Is CVE-2020-5202 being exploited?
There is no known exploitation of CVE-2020-5202 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as DEBIAN-CVE-2020-5202, GHSA-ppjv-mwcc-539j, UBUNTU-CVE-2020-5202.