CVE-2023-5870
Postgresql: role pg_signal_backend can signal certain superuser processes.
4.4
MEDIUM
CVSS 3.1
EPSS 0.62%
Description
A flaw was found in PostgreSQL involving the pg_cancel_backend role that signals background workers, including the logical replication launcher, autovacuum workers, and the autovacuum launcher. Successful exploitation requires a non-core extension with a less-resilient background worker and would affect that specific background worker only. This issue may allow a remote high privileged user to launch a denial of service (DoS) attack.
How to fix CVE-2023-5870
To remediate CVE-2023-5870, upgrade the affected package to a fixed version below.
- —upgrade to 14.10-r0 or later
- —upgrade to 15.5-r0 or later
- —upgrade to 16.1-r0 or later
- —upgrade to 11.22.0 or later
- —upgrade to 13.13-0+deb11u1 or later
- —upgrade to 15.5-0+deb12u1 or later
Is CVE-2023-5870 being exploited?
Low — EPSS is 0.6%, meaning exploitation activity has not been observed at scale.
Affected packages (6)
- from 0, < 14.10-r0
- from 0, < 15.5-r0
- from 0, < 16.1-r0
- >= 11.0.0, < 11.22.0, >= 12.0.0, < 12.17.0, >= 13.0.0, < 13.13.0, >= 14.0.0, < 14.10.0, >= 15.0.0, < 15.5.0, >= 16.0.0, < 16.0.1
- from 0, < 13.13-0+deb11u1
- from 0, < 15.5-0+deb12u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM4.4 | CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H |