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Ubuntu Security Notice USN-4972-1

Ubuntu Security Notice USN-4972-1
Posted Jun 1, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4972-1 - Tom Lane discovered that PostgreSQL incorrect handled certain array subscripting calculations. An authenticated attacker could possibly use this issue to overwrite server memory and escalate privileges. Andres Freund discovered that PostgreSQL incorrect handled certain INSERT ... ON CONFLICT ... DO UPDATE commands. A remote attacker could possibly use this issue to read server memory and obtain sensitive information. Various other issues were also addressed.

tags | advisory, remote
systems | linux, ubuntu
advisories | CVE-2021-32027, CVE-2021-32028, CVE-2021-32029
SHA-256 | 6d2f32424f89c0673047264898acd8aa2e015967a2bcfa395cfa26c0c00e5ac4

Ubuntu Security Notice USN-4972-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-4972-1
June 01, 2021

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

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

- Ubuntu 21.04
- Ubuntu 20.10
- 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:

Tom Lane discovered that PostgreSQL incorrect handled certain array
subscripting calculations. An authenticated attacker could possibly use
this issue to overwrite server memory and escalate privileges.
(CVE-2021-32027)

Andres Freund discovered that PostgreSQL incorrect handled certain
INSERT ... ON CONFLICT ... DO UPDATE commands. A remote attacker could
possibly use this issue to read server memory and obtain sensitive
information. (CVE-2021-32028)

Tom Lane discovered that PostgreSQL incorrect handled certain UPDATE ...
RETURNING commands. A remote attacker could possibly use this issue to read
server memory and obtain sensitive information. This issue only affected
Ubuntu 20.04 LTS, Ubuntu 20.10, and Ubuntu 21.04. (CVE-2021-32029)

Update instructions:

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

Ubuntu 21.04:
postgresql-13 13.3-0ubuntu0.21.04.1

Ubuntu 20.10:
postgresql-12 12.7-0ubuntu0.20.10.1

Ubuntu 20.04 LTS:
postgresql-12 12.7-0ubuntu0.20.04.1

Ubuntu 18.04 LTS:
postgresql-10 10.17-0ubuntu0.18.04.1

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-4972-1
CVE-2021-32027, CVE-2021-32028, CVE-2021-32029

Package Information:
https://launchpad.net/ubuntu/+source/postgresql-13/13.3-0ubuntu0.21.04.1
https://launchpad.net/ubuntu/+source/postgresql-12/12.7-0ubuntu0.20.10.1
https://launchpad.net/ubuntu/+source/postgresql-12/12.7-0ubuntu0.20.04.1
https://launchpad.net/ubuntu/+source/postgresql-10/10.17-0ubuntu0.18.04.1
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