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Ubuntu 21.10 and 20.04 LTS: 5260-1 Critical Samba Denial Of Service Threat

ubuntu
Calendar Grey February 1, 2022
Dist Ubuntu Esm H88
Multiple vulnerabilities in Samba addressed in Ubuntu impacting versions 21.10 and 20.04 LTS. Urgent update advised.
Several security issues were fixed in Samba.

Summary

Several security issues were fixed in Samba.

Software Description:

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

Details:

Orange Tsai discovered that the Samba vfs_fruit module incorrectly handled

certain memory operations. A remote attacker could use this issue to cause

Samba to crash, resulting in a denial of service, or possibly execute

arbitrary code as root. (CVE-2021-44142)

Michael Hanselmann discovered that Samba incorrectly created directories.

In certain configurations, a remote attacker could possibly create a

directory on the server outside of the shared directory. (CVE-2021-43566)

Kees van Vloten discovered that Samba incorrectly handled certain aliased

SPN checks. A remote attacker could possibly use this issue to impersonate

services. (CVE-2022-0336)

Topics%20covered

Topics Covered

security advisory denial of service samba critical update ubuntu software vulnerability

Update Instructions

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

Ubuntu 21.10:
  samba                           2:4.13.17~dfsg-0ubuntu0.21.10.1

Ubuntu 20.04 LTS:
  samba                           2:4.13.17~dfsg-0ubuntu0.21.04.1

This update uses a new upstream release, which includes additional bug
fixes. In general, a standard system update will make all the necessary
changes.

References

https://ubuntu.com/security/notices/USN-5260-1

CVE-2021-43566, CVE-2021-44142, CVE-2022-0336

Severity
critical
Lowest
Low
Medium
High
Critical

February 01, 2022

Topics%20covered

Topics Covered

security advisory denial of service samba critical update ubuntu software vulnerability

Package Information

https://launchpad.net/ubuntu/+source/samba/2:4.13.17~dfsg-0ubuntu0.21.10.1
https://launchpad.net/ubuntu/+source/samba/2:4.13.17~dfsg-0ubuntu0.21.04.1

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