A postgresql-15 security update has been released for Debian GNU/Linux 12 to address several vulnerabilities.

[SECURITY] [DSA 5553-1] postgresql-15 security update

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Debian Security Advisory DSA-5553-1 security@debian.org
https://www.debian.org/security/ Salvatore Bonaccorso
November 13, 2023 https://www.debian.org/security/faq
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Package : postgresql-15
CVE ID : CVE-2023-5868 CVE-2023-5869 CVE-2023-5870 CVE-2023-39417
CVE-2023-39418

Several vulnerabilities have been discovered in the PostgreSQL
database system.

CVE-2023-5868

Jingzhou Fu discovered a memory disclosure flaw in aggregate
function calls.

CVE-2023-5869

Pedro Gallegos reported integer overflow flaws resulting in buffer
overflows in the array modification functions.

CVE-2023-5870

Hemanth Sandrana and Mahendrakar Srinivasarao reported that the
pg_cancel_backend role can signal certain superuser processes,
potentially resulting in denial of service.

CVE-2023-39417

Micah Gate, Valerie Woolard, Tim Carey-Smith, and Christoph Berg
reported that an extension script using @substitutions@ within
quoting may allow to perform an SQL injection for an attacker having
database-level CREATE privileges.

CVE-2023-39418

Dean Rasheed reported that the MERGE command to enforce UPDATE or
SELECT row security policies.

For the stable distribution (bookworm), these problems have been fixed
in version 15.5-0+deb12u1.

We recommend that you upgrade your postgresql-15 packages.

For the detailed security status of postgresql-15 please refer to its
security tracker page at:
https://security-tracker.debian.org/tracker/postgresql-15

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/