TI-2020-10235 Aliases CVE-2020-12872 GHSA-2g9r-9f99-v27g

yaws_config.erl in Yaws through 2.0.2 and/or 2.0.7 loads obsolete TLS ciphers, as…

LOW 25CWE-326Published 2020-05-15 · Updated 2024-08-04

Key facts

Attack vector: Local
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Information disclosure
Confidentiality · integrity · availability: High · None · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-326.

Summary

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.

Why it matters now

EPSS 0.00393 33rd percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:yaws:yaws::::::::	2.0.2 – 2.0.6	Vulnerable	yaws

cpe:2.3:a:yaws:yaws:*:*:*:*:*:*:*:* Versions 2.0.2 – 2.0.6 Vulnerable ·yaws

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product

Red Hat

Timeline

2026-10-02 Threatist record created from CVE-2020-12872
2026-10-03 Alias added: GHSA-2g9r-9f99-v27g

References

Exploit 1

https://github.com/erlyaws/yaws/blob/c0fd79f17d52628fcec527da7fa3e788c283c445/src/yaws_config.erl#L2068-L2075

Advisory 3

Other 1

https://medium.com/%40charlielabs101/cve-2020-12872-df315411aa70

TI-2017-08057 Yaws 1.91 allows Unauthenticated Remote File Disclosure via HTTP Directory Traversal with… CVSS 3.0HIGH 7.5
TI-2020-15240 CGI implementation in Yaws web server versions 1.81 to 2.0.7 is vulnerable to OS command injection. CVSS 3.1CRITICAL 9.8
TI-2020-14922 WebDAV implementation in Yaws web server versions 1.81 to 2.0.7 is vulnerable to XXE injection. CVSS 3.1CRITICAL 9.8
TI-2011-03815 Path traversal in yaws CVSS 3.1MEDIUM 6.5
TI-2009-04256 Yaws 1.85 writes data to a log file without sanitizing non-printable characters, which… CVSS 2.0MEDIUM 5.0
TI-2009-00716 Yaws before 1.80 allows remote attackers to cause a denial of service (memory consumption… CVSS 2.0MEDIUM 5.0

See all 9 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences