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Ubuntu Security Notice USN-5038-1

Ubuntu Security Notice USN-5038-1
Posted Aug 13, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5038-1 - It was discovered that the PostgresQL planner could create incorrect plans in certain circumstances. A remote attacker could use this issue to cause PostgreSQL to crash, resulting in a denial of service, or possibly obtain sensitive information from memory. This issue only affected Ubuntu 20.04 LTS and Ubuntu 21.04. It was discovered that PostgreSQL incorrectly handled certain SSL renegotiation ClientHello messages from clients. A remote attacker could possibly use this issue to cause PostgreSQL to crash, resulting in a denial of service. Various other issues were also addressed.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2021-3449, CVE-2021-3677
SHA-256 | ba7d2eca99cc28f70588d7fad45e096bb5d26bc41a8ee9cacb70b88517f73a4e

Ubuntu Security Notice USN-5038-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-5038-1
August 12, 2021

postgresql-10, postgresql-12, postgresql-13 vulnerabilities
==========================================================================

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

- Ubuntu 21.04
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in PostgreSQL.

Software Description:
- postgresql-13: Object-relational SQL database
- postgresql-12: Object-relational SQL database
- postgresql-10: Object-relational SQL database

Details:

It was discovered that the PostgresQL planner could create incorrect plans
in certain circumstances. A remote attacker could use this issue to cause
PostgreSQL to crash, resulting in a denial of service, or possibly obtain
sensitive information from memory. This issue only affected Ubuntu 20.04
LTS and Ubuntu 21.04. (CVE-2021-3677)

It was discovered that PostgreSQL incorrectly handled certain SSL
renegotiation ClientHello messages from clients. A remote attacker could
possibly use this issue to cause PostgreSQL to crash, resulting in a denial
of service. (CVE-2021-3449)

Update instructions:

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

Ubuntu 21.04:
postgresql-13 13.4-0ubuntu0.21.04.1

Ubuntu 20.04 LTS:
postgresql-12 12.8-0ubuntu0.20.04.1

Ubuntu 18.04 LTS:
postgresql-10 10.18-0ubuntu0.18.04.1

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.

References:
https://ubuntu.com/security/notices/USN-5038-1
CVE-2021-3449, CVE-2021-3677

Package Information:
https://launchpad.net/ubuntu/+source/postgresql-13/13.4-0ubuntu0.21.04.1
https://launchpad.net/ubuntu/+source/postgresql-12/12.8-0ubuntu0.20.04.1
https://launchpad.net/ubuntu/+source/postgresql-10/10.18-0ubuntu0.18.04.1

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