CVE-2020-12872 : Vulnerability Insights and Analysis

Yaws through 2.0.2 and/or 2.0.7 is affected by CVE-2020-12872, which involves the loading of obsolete TLS ciphers, potentially allowing Sweet32 attacks.

Understanding CVE-2020-12872

This CVE affects Yaws, a web server written in Erlang.

What is CVE-2020-12872?

CVE-2020-12872 relates to the loading of outdated TLS ciphers in Yaws, potentially exposing it to Sweet32 attacks when running on specific Erlang/OTP virtual machine versions.

The Impact of CVE-2020-12872

The vulnerability could lead to security compromises, enabling attackers to exploit the obsolete ciphers and launch Sweet32 attacks.

Technical Details of CVE-2020-12872

Yaws through versions 2.0.2 and 2.0.7 are susceptible to this vulnerability.

Vulnerability Description

The issue arises from the loading of outdated TLS ciphers in the yaws_config.erl file.

Affected Systems and Versions

Yaws versions 2.0.2 and 2.0.7
Erlang/OTP virtual machines with versions below 21.0

Exploitation Mechanism

Attackers can exploit the obsolete TLS ciphers to carry out Sweet32 attacks on vulnerable systems.

Mitigation and Prevention

It is crucial to take immediate action to address and prevent potential exploits.

Immediate Steps to Take

Update Yaws to a version that addresses the vulnerability
Disable outdated TLS ciphers in the configuration
Monitor for any unusual network activity

Long-Term Security Practices

Regularly update software and dependencies
Implement strong encryption protocols
Conduct security assessments and audits

Patching and Updates

Apply patches or updates provided by Yaws to mitigate the vulnerability