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Ubuntu Security Notice USN-4986-3

Ubuntu Security Notice USN-4986-3
Posted Jun 11, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4986-3 - USN-4986-1 fixed a vulnerability in rpcbind. The update caused a regression resulting in rpcbind crashing in certain environments. This update fixes the problem. It was discovered that rpcbind incorrectly handled certain large data sizes. A remote attacker could use this issue to cause rpcbind to consume resources, leading to a denial of service. Various other issues were also addressed.

tags | advisory, remote, denial of service
systems | linux, ubuntu
MD5 | 41e7676309c0599e059017688e4bcef3

Ubuntu Security Notice USN-4986-3

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-4986-3
June 10, 2021

rpcbind regression
==========================================================================

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

- Ubuntu 18.04 LTS

Summary:

USN-4986-1 caused a regression in rpcbind.

Software Description:
- rpcbind: converts RPC program numbers into universal addresses

Details:

USN-4986-1 fixed a vulnerability in rpcbind. The update caused a regression
resulting in rpcbind crashing in certain environments. This update fixes
the problem.

We apologize for the inconvenience.

Original advisory details:

It was discovered that rpcbind incorrectly handled certain large data
sizes. A remote attacker could use this issue to cause rpcbind to consume
resources, leading to a denial of service.

Update instructions:

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

Ubuntu 18.04 LTS:
rpcbind 0.2.3-0.6ubuntu0.18.04.3

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-4986-3
https://ubuntu.com/security/notices/USN-4986-1
https://launchpad.net/bugs/1931507

Package Information:
https://launchpad.net/ubuntu/+source/rpcbind/0.2.3-0.6ubuntu0.18.04.3

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