- Vulnerability/
- USN-6242-1
USN-6242-1: OpenSSH vulnerability
First published: Mon Jul 24 2023(Updated: )
It was discovered that OpenSSH incorrectly handled loading certain PKCS#11 providers. If a user forwarded their ssh-agent to an untrusted system, a remote attacker could possibly use this issue to load arbitrary libraries from the user's system and execute arbitrary code.
| Affected Software | Affected Version | How to fix |
|---|---|---|
| All of | ||
| ubuntu/openssh-client | <1:9.0p1-1ubuntu8.4 | 1:9.0p1-1ubuntu8.4 |
| Ubuntu Ubuntu | =23.04 | |
| All of | ||
| ubuntu/openssh-client | <1:8.9p1-3ubuntu0.3 | 1:8.9p1-3ubuntu0.3 |
| Ubuntu Ubuntu | =22.04 | |
| All of | ||
| ubuntu/openssh-client | <1:8.2p1-4ubuntu0.8 | 1:8.2p1-4ubuntu0.8 |
| Ubuntu Ubuntu | =20.04 |
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Reference Links
- https://ubuntu.com/security/CVE-2023-38408
- https://ubuntu.com/security/notices/USN-6242-2
- https://launchpad.net/ubuntu/+source/openssh/1:9.0p1-1ubuntu8.4
- https://launchpad.net/ubuntu/+source/openssh/1:8.9p1-3ubuntu0.3
- https://launchpad.net/ubuntu/+source/openssh/1:8.2p1-4ubuntu0.8
- https://ubuntu.com/security/notices/USN-6242-1 (Advisory)
Frequently Asked Questions
What is the vulnerability ID for this OpenSSH vulnerability?
The vulnerability ID for this OpenSSH vulnerability is USN-6242-1.
What is the description of the OpenSSH vulnerability?
The OpenSSH vulnerability allows a remote attacker to load arbitrary libraries and execute arbitrary code by exploiting the incorrect handling of loading certain PKCS#11 providers.
How does the OpenSSH vulnerability affect Ubuntu 23.04?
Ubuntu 23.04 is affected by the OpenSSH vulnerability if OpenSSH client version 1:9.0p1-1ubuntu8.4 or earlier is installed.
How does the OpenSSH vulnerability affect Ubuntu 22.04?
Ubuntu 22.04 is affected by the OpenSSH vulnerability if OpenSSH client version 1:8.9p1-3ubuntu0.3 or earlier is installed.
How does the OpenSSH vulnerability affect Ubuntu 20.04?
Ubuntu 20.04 is affected by the OpenSSH vulnerability if OpenSSH client version 1:8.2p1-4ubuntu0.8 or earlier is installed.
How can I fix the OpenSSH vulnerability?
To fix the OpenSSH vulnerability, update the OpenSSH client package to version 1:9.0p1-1ubuntu8.4 or later for Ubuntu 23.04, version 1:8.9p1-3ubuntu0.3 or later for Ubuntu 22.04, and version 1:8.2p1-4ubuntu0.8 or later for Ubuntu 20.04.
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