CVE-2025-30211

28.03.2025, 15:15

Erlang/OTP is a set of libraries for the Erlang programming language. Prior to versions OTP-27.3.1, 26.2.5.10, and 25.3.2.19, a maliciously formed KEX init message can result with high memory usage. Implementation does not verify RFC specified limits on algorithm names (64 characters) provided in KEX init message. Big KEX init packet may lead to inefficient processing of the error data. As a result, large amount of memory will be allocated for processing malicious data. Versions OTP-27.3.1, OTP-26.2.5.10, and OTP-25.3.2.19 fix the issue. Some workarounds are available. One may set option `parallel_login` to `false` and/or reduce the `max_sessions` option.

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	NIST	7.5 HIGH	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub_M	CNA	7.5 HIGH	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA-ADP	ADP	---				---

Awaiting analysis

This vulnerability is currently awaiting analysis.

Base Score

CVSS 3.x

EPSS Score

Percentile: 22%

Debian Releases

Debian Product

Codename

erlang

bullseye	vulnerable
bullseye (security)	1:23.2.6+dfsg-1+deb11u2 fixed
bookworm	1:25.2.3+dfsg-1+deb12u1 fixed
bookworm (security)	1:25.2.3+dfsg-1+deb12u1 fixed
trixie	1:27.3.3+dfsg-1 fixed
sid	1:27.3.4+dfsg-1 fixed

Common Weakness Enumeration

CWE-789 - Memory Allocation with Excessive Size Value
The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated.

References

https://github.com/erlang/otp/security/advisories/GHSA-vvr3-fjhh-cfwc