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USN-4730-1: PostSRSd vulnerability

10 February 2021

PostSRSd could be made to crash if it received specially crafted input.

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Releases

Packages

  • postsrsd - Sender Rewriting Scheme via TCP-based lookup tables for Postfix

Details

It was discovered that PostSRSd mishandled certain input. A remote attacker
could use this vulnerability to cause a denial of service via a long timestamp
tag in an SRS address.

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 18.04

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

References

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Further reading