CVE-2020-12872 Weak cryptography in n/a

Medium 5.5 Published 15 May 2020 Updated 4 Aug 2024

Yaws web server loads obsolete TLS ciphers on older Erlang VMs, enabling Sweet32 attacks that allow attackers to decrypt sensitive data.

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-2020-12872?

CVE-2020-12872 is a medium-severity vulnerability in n/a, published on 15 May 2020. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

yaws_config.erl in Yaws through 2.0.2 and/or 2.0.7 loads obsolete TLS ciphers, as demonstrated by ones that allow Sweet32 attacks, if running on an Erlang/OTP virtual machine with a version less than 21.0.

Weakness: CWE-326

Which versions are affected by CVE-2020-12872?

It affects 1 product.

Products include Yaws Yaws.

How do I fix CVE-2020-12872?

Upgrade to a fixed version.

Is CVE-2020-12872 being exploited?

There is no known exploitation of CVE-2020-12872 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2020-12872, GHSA-2g9r-9f99-v27g, UBUNTU-CVE-2020-12872.