[Pkg-erlang-devel] Bug#1101713: erlang: CVE-2025-30211

[Salvatore Bonaccorso]

Source: erlang
Version: 1:27.3+dfsg-1
Severity: important
Tags: security upstream
X-Debbugs-Cc: carnil at debian.org, Debian Security Team <team at security.debian.org>

Hi,

The following vulnerability was published for erlang.

CVE-2025-30211[0]:
| 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.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2025-30211
    https://www.cve.org/CVERecord?id=CVE-2025-30211
[1] https://github.com/erlang/otp/security/advisories/GHSA-vvr3-fjhh-cfwc

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore