SB2020051524 - MitM attack in Yaws
Published: May 15, 2020 Updated: September 27, 2020
Security Bulletin ID
SB2020051524
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use of a broken or risky cryptographic algorithm (CVE-ID: CVE-2020-12872)
CWE-ID: CWE-327 - Use of a Broken or Risky Cryptographic Algorithm
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to decrypt sensitive information.
The vulnerability exists due to yaws_config.erl in Yaws loads obsolete TLS ciphers if running on an Erlang/OTP virtual machine with a version less than 21.0. A remote attacker can perform Sweet32 attack.
Remediation
Install update from vendor's website.