Vulnerability · Published May 15, 2020 · Assigned by mitre
CVE-2020-12872
Medium 5.5
In plain English
A medium-severity security flaw in the erlang package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 34% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.4%top 66.4% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | erlang | 1:21.2.6+dfsg-1 | DEBIAN-CVE-2020-12872 |
| Debian:13 | erlang | 1:21.2.6+dfsg-1 | DEBIAN-CVE-2020-12872 |
| Debian:14 | erlang | 1:21.2.6+dfsg-1 | DEBIAN-CVE-2020-12872 |
| Ubuntu:22.04:LTS | yaws | no fix listed | UBUNTU-CVE-2020-12872 |
| Ubuntu:24.04:LTS | yaws | no fix listed | UBUNTU-CVE-2020-12872 |
| Ubuntu:25.10 | yaws | no fix listed | UBUNTU-CVE-2020-12872 |
| Ubuntu:26.04:LTS | yaws | no fix listed | UBUNTU-CVE-2020-12872 |
| Ubuntu:26.10 | yaws | no fix listed | UBUNTU-CVE-2020-12872 |
Affected products (as reported)
References
- https://sweet32.info/ x_refsource_MISC
- https://github.com/erlyaws/yaws/blob/c0fd79f17d52628fcec527da7fa3e788c283c445/src/yaws_config.erl#L2068-L2075 x_refsource_MISC
- https://github.com/erlyaws/yaws/releases x_refsource_MISC
- https://medium.com/%40charlielabs101/cve-2020-12872-df315411aa70 x_refsource_MISC
- https://github.com/erlyaws/yaws/issues/402 x_refsource_MISC