USN-6859-1: OpenSSH vulnerability
It was discovered that OpenSSH incorrectly handled signal management. A remote attacker could use this issue to bypass authentication and remotely access systems without proper credentials.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
ubuntu/openssh-clientto a version that resolves this vulnerability.Fixed in 1:9.6p1-3ubuntu13.3 - Upgrade
Upgrade
ubuntu/openssh-serverto a version that resolves this vulnerability.Fixed in 1:9.6p1-3ubuntu13.3 - Upgrade
Upgrade
ubuntu/openssh-clientto a version that resolves this vulnerability.Fixed in 1:9.3p1-1ubuntu3.6 - Upgrade
Upgrade
ubuntu/openssh-serverto a version that resolves this vulnerability.Fixed in 1:9.3p1-1ubuntu3.6 - Upgrade
Upgrade
ubuntu/openssh-clientto a version that resolves this vulnerability.Fixed in 1:8.9p1-3ubuntu0.10 - Upgrade
Upgrade
ubuntu/openssh-serverto a version that resolves this vulnerability.Fixed in 1:8.9p1-3ubuntu0.10
Event History
Frequently Asked Questions
What is the severity of USN-6859-1?
USN-6859-1 is considered a high severity vulnerability due to the potential for bypassing authentication.
How do I fix USN-6859-1?
To fix USN-6859-1, update OpenSSH to the patched versions specified: 1:9.6p1-3ubuntu13.3 for Ubuntu 24.04, 1:9.3p1-1ubuntu3.6 for Ubuntu 23.10, or 1:8.9p1-3ubuntu0.10 for Ubuntu 22.04.
Who is affected by USN-6859-1?
Users of OpenSSH on Ubuntu 24.04, 23.10, and 22.04 are affected by USN-6859-1.
Can USN-6859-1 be exploited remotely?
Yes, a remote attacker could exploit USN-6859-1 to gain unauthorized access to systems.
What is the nature of USN-6859-1 vulnerability?
USN-6859-1 involves improper handling of signal management in OpenSSH, leading to authentication bypass.