USN-6860-1: OpenVPN vulnerabilities

Releases

• Ubuntu 24.04 LTS
• Ubuntu 23.10
• Ubuntu 22.04 LTS
• Ubuntu 20.04 LTS

Packages

• openvpn - virtual private network software

Details

Reynir Björnsson discovered that OpenVPN incorrectly handled terminating
client connections. A remote authenticated client could possibly use this
issue to keep the connection active, bypassing certain security policies.
This issue only affected Ubuntu 23.10, and Ubuntu 24.04 LTS.
(CVE-2024-28882)

Reynir Björnsson discovered that OpenVPN incorrectly handled certain
control channel messages with nonprintable characters. A remote attacker
could possibly use this issue to cause OpenVPN to consume resources, or
fill up log files with garbage, leading to a denial of service.
(CVE-2024-5594)

Update instructions

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

Ubuntu 24.04

• openvpn - 2.6.9-1ubuntu4.1

Ubuntu 23.10

• openvpn - 2.6.5-0ubuntu1.2

Ubuntu 22.04

• openvpn - 2.5.9-0ubuntu0.22.04.3

Ubuntu 20.04

• openvpn - 2.4.12-0ubuntu0.20.04.2

In general, a standard system update will make all the necessary changes.

References

• CVE-2024-5594
• CVE-2024-28882