1. Ubuntu Security Notices
  2. USN-4454-2

USN-4454-2: Samba vulnerability

Publication date

10 August 2020

Overview

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

Releases

Packages

  • 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.

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.

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
14.04 trusty samba –  2:4.3.11+dfsg-0ubuntu0.14.04.20+esm8
12.04 precise samba –  2:3.6.25-0ubuntu0.12.04.21

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References

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