========================================================================== Ubuntu Security Notice USN-6565-1 January 03, 2024
openssh vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 23.10 - Ubuntu 23.04 - Ubuntu 22.04 LTS - Ubuntu 20.04 LTS Summary: Several security issues were fixed in OpenSSH. Software Description: - openssh: secure shell (SSH) for secure access to remote machines Details: It was discovered that OpenSSH incorrectly handled supplemental groups when running helper programs for AuthorizedKeysCommand and AuthorizedPrincipalsCommand as a different user. An attacker could possibly use this issue to escalate privileges. This issue only affected Ubuntu 20.04 LTS. (CVE-2021-41617) It was discovered that OpenSSH incorrectly added destination constraints when PKCS#11 token keys were added to ssh-agent, contrary to expectations. This issue only affected Ubuntu 22.04 LTS, and Ubuntu 23.04. (CVE-2023-51384) It was discovered that OpenSSH incorrectly handled user names or host names with shell metacharacters. An attacker could possibly use this issue to perform OS command injection. (CVE-2023-51385) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 23.10: openssh-client 1:9.3p1-1ubuntu3.2 openssh-server 1:9.3p1-1ubuntu3.2 Ubuntu 23.04: openssh-client 1:9.0p1-1ubuntu8.7 openssh-server 1:9.0p1-1ubuntu8.7 Ubuntu 22.04 LTS: openssh-client 1:8.9p1-3ubuntu0.6 openssh-server 1:8.9p1-3ubuntu0.6 Ubuntu 20.04 LTS: openssh-client 1:8.2p1-4ubuntu0.11 openssh-server 1:8.2p1-4ubuntu0.11 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-6565-1 CVE-2021-41617, CVE-2023-51384, CVE-2023-51385 Package Information: https://launchpad.net/ubuntu/+source/openssh/1:9.3p1-1ubuntu3.2 https://launchpad.net/ubuntu/+source/openssh/1:9.0p1-1ubuntu8.7 https://launchpad.net/ubuntu/+source/openssh/1:8.9p1-3ubuntu0.6 https://launchpad.net/ubuntu/+source/openssh/1:8.2p1-4ubuntu0.11
OpenPGP_signature.asc
Description: OpenPGP digital signature
