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.
References (5)
Core 5
Core References
Exploit, Third Party Advisory x_refsource_misc
https://github.com/erlyaws/yaws/blob/c0fd79f17d52628fcec527da7fa3e788c283c445/src/yaws_config.erl#L2068-L2075
Release Notes, Third Party Advisory x_refsource_misc
https://github.com/erlyaws/yaws/releases
Various Sources x_refsource_misc
https://medium.com/%40charlielabs101/cve-2020-12872-df315411aa70
Issue Tracking, Third Party Advisory x_refsource_misc
https://github.com/erlyaws/yaws/issues/402
Third Party Advisory x_refsource_misc
https://sweet32.info/
Scores
CVSS v3
5.5
EPSS
0.0039
EPSS Percentile
30.8%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Details
CWE
CWE-326
Status
published
Products (1)
yaws/yaws
2.0.2 - 2.0.6
Published
May 15, 2020
Tracked Since
Feb 18, 2026