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Ubuntu 20.04 LTS: USN-5123-1 Moderate Nginx Security Fix for DoS Risk

ubuntu
Calendar Grey June 10, 2021
Dist Ubuntu Esm H88
Ubuntu Security Update USN-4987-5 tackles a regression in rpcbind impacting Ubuntu 14.04 and 16.04 ESM.
USN-4986-1 caused a regression in rpcbind.

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 for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.

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.

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu regression rpcbind

Update Instructions

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

Ubuntu 16.04 ESM:
  rpcbind                         0.2.3-0.2ubuntu0.16.04.1+esm2

Ubuntu 14.04 ESM:
  rpcbind                         0.2.1-2ubuntu2.2+esm2

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

References

https://ubuntu.com/security/notices/USN-4986-4

https://ubuntu.com/security/notices/USN-4986-1

https://bugs.launchpad.net/ubuntu/+source/rpcbind/+bug/1931507

June 10, 2021

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu regression rpcbind

Package Information

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