CVE-2023-39418 Postgresql: merge fails to enforce update or select row security policies
Attackers can bypass row security policies to insert forbidden rows using the MERGE command, requiring specific policy configurations.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-39418?
CVE-2023-39418 is a low-severity missing authorization vulnerability in Debian Debian Linux, published on 11 Aug 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was found in PostgreSQL with the use of the MERGE command, which fails to test new rows against row security policies defined for UPDATE and SELECT. If UPDATE and SELECT policies forbid some rows that INSERT policies do not forbid, a user could store such rows.
Weakness: CWE-1220
Which versions are affected by CVE-2023-39418?
1 open source package ship an affected version, including postgresql. It affects 3 products.
| Package | Affected | Fixed in |
|---|---|---|
postgresql Bitnami | From 15.0.0 | 15.4.0 |
Products include Debian Debian Linux, Postgresql Postgresql, Redhat Enterprise Linux.
How do I fix CVE-2023-39418?
Upgrade postgresql to 15.4.0 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2023-39418 being exploited?
There is no known exploitation of CVE-2023-39418 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as ALPINE-CVE-2023-39418, BIT-postgresql-2023-39418, CLEANSTART-2026-VX15761, DEBIAN-CVE-2023-39418, ECHO-108e-f2fd-6847, GHSA-chgx-7cw3-hr55.