CVE-2023-5870
Public on 2023-11-12
Modified on 2024-03-13
Description
The documentation says the pg_cancel_backend role cannot signal "a backend owned by a superuser". On the contrary, it can signal background workers, including the logical replication launcher. It can signal autovacuum workers and the autovacuum launcher. Signaling autovacuum workers and those two launchers provides no meaningful exploit, so exploiting this vulnerability requires a non-core extension with a less-resilient background worker. For example, a non-core background worker that does not auto-restart would experience a denial of service with respect to that particular background worker.
Severity
CVSS v3 Base Score
See breakdown
Affected Packages
Platform | Package | Release Date | Advisory | Status |
---|---|---|---|---|
HAQM Linux 2 - Core | postgresql | Pending Fix | ||
HAQM Linux 2 - Postgresql12 Extra | postgresql | 2024-01-19 | ALAS2POSTGRESQL12-2024-007 | Fixed |
HAQM Linux 2 - Postgresql13 Extra | postgresql | 2024-01-19 | ALAS2POSTGRESQL13-2024-005 | Fixed |
HAQM Linux 2 - Postgresql14 Extra | postgresql | 2024-01-19 | ALAS2POSTGRESQL14-2024-004 | Fixed |
HAQM Linux 2023 | postgresql15 | 2024-01-03 | ALAS2023-2024-464 | Fixed |
HAQM Linux 1 | postgresql92 | Pending Fix |
CVSS Scores
Score Type | Score | Vector | |
---|---|---|---|
HAQM Linux | CVSSv3 | 2.2 | CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L |
NVD | CVSSv3 | 4.4 | CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H |