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Ubuntu 14.04 ESM: USN-4454-2 Critical Samba DoS Advisory

ubuntu
Calendar Grey August 10, 2020
Dist Ubuntu Esm H88
Ubuntu Security Notice USN-4454-3 addresses a crucial samba vulnerability leading to instabilities triggered by certain types of network activity.
Samba could be made to crash if it received specially crafted network traffic.

Summary

Samba could be made to crash if it received specially crafted network

traffic.

Software Description:

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

Details:

USN-4454-1 fixed a vulnerability in Samba. This update provides

the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.

Original advisory details:

Martin von Wittich and Wilko Meyer discovered that Samba incorrectly

handled certain empty UDP packets when being used as a AD DC NBT server. A

remote attacker could possibly use this issue to cause Samba to crash,

resulting in a denial of service.

Topics%20covered

Topics Covered

security advisory denial of service samba Ubuntu network issues

Update Instructions

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

Ubuntu 14.04 ESM:
  samba                           2:4.3.11+dfsg-0ubuntu0.14.04.20+esm8

Ubuntu 12.04 ESM:
  samba                           2:3.6.25-0ubuntu0.12.04.21

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

References

https://ubuntu.com/security/notices/USN-4454-2

https://ubuntu.com/security/notices/USN-4454-1

CVE-2020-14303

Severity
critical
Lowest
Low
Medium
High
Critical

August 10, 2020

Topics%20covered

Topics Covered

security advisory denial of service samba Ubuntu network issues

Package Information

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