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[USN-7656-1] Erlang vulnerabilities

Posted on 21 July 2025
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-7656-1
July 21, 2025

erlang vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 25.04
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS

Summary:

Several security issues were fixed in Erlang.

Software Description:
- erlang: Concurrent, real-time, distributed functional language

Details:

It was discovered that Erlang OTP's SSH module incorrectly enforced strict
KEX handshake hardening measures. A remote attacker able to intercept
communications could possibly use this issue to insert optional messages
into connections during the handshake. (CVE-2025-46712)

It was discovered that Erlang OTP incorrectly handled ZIP archives. If a
user or automated system were tricked into opening a specially crafted ZIP
archive, a remote attacker could possibly use this issue to overwrite
arbitrary files outside of the intended directory. (CVE-2025-4748)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 25.04
erlang 1:27.3+dfsg-1ubuntu1.2
erlang-ssh 1:27.3+dfsg-1ubuntu1.2

Ubuntu 24.04 LTS
erlang 1:25.3.2.8+dfsg-1ubuntu4.4
erlang-ssh 1:25.3.2.8+dfsg-1ubuntu4.4

Ubuntu 22.04 LTS
erlang 1:24.2.1+dfsg-1ubuntu0.5
erlang-ssh 1:24.2.1+dfsg-1ubuntu0.5

After a standard system update you need to reboot your computer to make all
the necessary changes.

References:
https://ubuntu.com/security/notices/USN-7656-1
CVE-2025-46712, CVE-2025-4748

Package Information:
https://launchpad.net/ubuntu/+source/erlang/1:27.3+dfsg-1ubuntu1.2
https://launchpad.net/ubuntu/+source/erlang/1:25.3.2.8+dfsg-1ubuntu4.4
https://launchpad.net/ubuntu/+source/erlang/1:24.2.1+dfsg-1ubuntu0.5

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