Ubuntu alert USN-7582-2 (samba)

From:
             
 
Giampaolo Fresi Roglia <giampaolo.fresi.roglia@canonical.com>
To:
             
 
ubuntu-security-announce@lists.ubuntu.com
Subject:
             
 
[USN-7582-2] Samba regression
Date:
             
 
Mon, 30 Jun 2025 10:52:47 +0200
Message-ID:
             
 
<87ms9pwqzk.fsf@guybrush.castelldefels.cthulhu.home.arpa>
==========================================================================
Ubuntu Security Notice USN-7582-2
June 30, 2025

samba regression
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

USN-7582-1 introduced a regression in Samba.

Software Description:
- samba: SMB/CIFS file, print, and login server for Unix

Details:

USN-7582-1 fixed vulnerabilities in Samba. The update introduced a
regression. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

 Evgeny Legerov discovered that Samba incorrectly handled buffers in
 certain GSSAPI routines of Heimdal. A remote attacker could possibly use
 this issue to cause Samba to crash, resulting in a denial of service.
 (CVE-2022-3437)
 
 Greg Hudson discovered that Samba incorrectly handled PAC parsing. On
 32-bit systems, a remote attacker could use this issue to escalate
 privileges, or possibly execute arbitrary code. (CVE-2022-42898)
 
 Joseph Sutton discovered that Samba could be forced to issue rc4-hmac
 encrypted Kerberos tickets. A remote attacker could possibly use this
 issue to escalate privileges. This issue only affected Ubuntu 20.04 LTS
 and Ubuntu 22.04 LTS. (CVE-2022-45141)
 
 Florent Saudel discovered that Samba incorrectly handled certain Spotlight
 requests. A remote attacker could possibly use this issue to cause Samba
 to consume resources, leading to a denial of service. (CVE-2023-34966)

Update instructions:

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

Ubuntu 18.04 LTS
  samba                           2:4.7.6+dfsg~ubuntu-0ubuntu2.29+esm2
                                  Available with Ubuntu Pro

Ubuntu 16.04 LTS
  samba                           2:4.3.11+dfsg-0ubuntu0.16.04.34+esm3
                                  Available with Ubuntu Pro

Ubuntu 14.04 LTS
  samba                           2:4.3.11+dfsg-0ubuntu0.14.04.20+esm14
                                  Available with Ubuntu Pro

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

References:
  https://ubuntu.com/security/notices/USN-7582-2
  https://ubuntu.com/security/notices/USN-7582-1
  https://launchpad.net/bugs/2115450



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