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USN-6296-1: PostgreSQL vulnerabilities

17 August 2023

Several security issues were fixed in PostgreSQL.

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Releases

Packages

Details

It was discovered that PostgreSQL incorrectly handled certain extension
script substitutions. An attacker having database-level CREATE privileges
can use this issue to execute arbitrary code as the bootstrap superuser.
(CVE-2023-39417)

It was discovered that PostgreSQL incorrectly handled the MERGE command. A
remote attacker could possibly use this issue to bypass certain UPDATE and
SELECT policies. This issue only affected Ubuntu 23.04. (CVE-2023-39418)

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 23.04
Ubuntu 22.04
Ubuntu 20.04

This update uses a new upstream release, which includes additional bug
fixes. After a standard system update you need to restart PostgreSQL to
make all the necessary changes.

Related notices

  • USN-6366-1: postgresql-pltcl-9.5, postgresql-server-dev-9.5, postgresql-client-9.5, postgresql-contrib-9.5, libecpg6, postgresql-plperl-9.5, libpq5, postgresql-9.5, postgresql-doc-9.5, postgresql-plpython3-9.5, libpgtypes3, libecpg-dev, libpq-dev, libecpg-compat3, postgresql-plpython-9.5