Vulnerability in Yaws
CVE-2020-12872
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (33.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 33.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- sweet32.info/ (Third Party Advisory)
- github.com/erlyaws/yaws/blob/c0fd79f17d52628fcec527da7fa3e788c283c445/src/yaws_… (Exploit, Third Party Advisory)
- github.com/erlyaws/yaws/releases (Third Party Advisory, Release Notes)
- medium.com/@charlielabs101/cve-2020-12872-df315411aa70
- github.com/erlyaws/yaws/issues/402 (Third Party Advisory, Issue Tracking)
Frequently asked questions
- What is CVE-2020-12872?
- CVE-2020-12872 is a medium-severity vulnerability in Yaws, classified under Inadequate Encryption Strength. CVSS score: 5.5/10. Published 2020-05-15.
- How severe is CVE-2020-12872?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2020-12872 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.