Use of a Broken or Risky Cryptographic Algorithm Affecting postgresql package, versions <11.10-r0

Note: Versions mentioned in the description apply only to the upstream postgresql package and not the postgresql package as distributed by Alpine. See How to fix? for Alpine:3.9 relevant fixed versions and status.

A flaw was found in PostgreSQL versions before 13.1, before 12.5, before 11.10, before 10.15, before 9.6.20 and before 9.5.24. If a client application that creates additional database connections only reuses the basic connection parameters while dropping security-relevant parameters, an opportunity for a man-in-the-middle attack, or the ability to observe clear-text transmissions, could exist. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

• https://security.netapp.com/advisory/ntap-20201202-0003/
• https://security.gentoo.org/glsa/202012-07
• https://bugzilla.redhat.com/show_bug.cgi?id=1894423
• https://www.postgresql.org/support/security/
• https://lists.debian.org/debian-lts-announce/2020/12/msg00005.html