[USN-5542-1] Samba vulnerabilities


========================================================================== Ubuntu Security Notice USN-5542-1 August 01, 2022
samba vulnerabilities ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 22.04 LTS – Ubuntu 20.04 LTS
Summary:
Several security issues were fixed in Samba.
Software Description: – samba: SMB/CIFS file, print, and login server for Unix
Details:
It was discovered that Samba did not handle MaxQueryDuration when being used in AD DC configurations, contrary to expectations. This issue only affected Ubuntu 20.04 LTS. (CVE-2021-3670)
Luke Howard discovered that Samba incorrectly handled certain restrictions associated with changing passwords. A remote attacker being requested to change passwords could possibly use this issue to escalate privileges. (CVE-2022-2031)
Luca Moro discovered that Samba incorrectly handled certain SMB1 communications. A remote attacker could possibly use this issue to obtain sensitive memory contents. (CVE-2022-32742)
Joseph Sutton discovered that Samba incorrectly handled certain password change requests. A remote attacker could use this issue to change passwords of other users, resulting in privilege escalation. (CVE-2022-32744)
Joseph Sutton discovered that Samba incorrectly handled certain LDAP add or modify requests. A remote attacker could possibly use this issue to cause Samba to crash, resulting in a denial of service. (CVE-2022-32745)
Joseph Sutton and Andrew Bartlett discovered that Samba incorrectly handled certain LDAP add or modify requests. A remote attacker could possibly use this issue to cause Samba to crash, resulting in a denial of service. (CVE-2022-32746)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 22.04 LTS: samba 2:4.15.9+dfsg-0ubuntu0.2
Ubuntu 20.04 LTS: samba 2:4.13.17~dfsg-0ubuntu1.20.04.1
The update for Ubuntu 22.04 LTS uses a new upstream release, which includes additional bug fixes. In general, a standard system update will make all the necessary changes.
References: ubuntu.com/security/notices/USN-5542-1 CVE-2021-3670, CVE-2022-2031, CVE-2022-32742, CVE-2022-32744, CVE-2022-32745, CVE-2022-32746
Package Information: launchpad.net/ubuntu/+source/samba/2:4.15.9+dfsg-0ubuntu0.2 launchpad.net/ubuntu/+source/samba/2:4.13.17~dfsg-0ubuntu1.20.04.1