CVE-2021-3935: SQL Injection
First published: Mon Nov 08 2021(Updated: )
When PgBouncer is configured to use "cert" authentication, a man-in-the-middle attacker can inject arbitrary SQL queries when a connection is first established, despite the use of TLS certificate verification and encryption.
Credit: patrick@puiterwijk.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/PgBouncer | <1.16.1 | 1.16.1 |
| debounce | <1.16.1 | |
| Red Hat Enterprise Linux | =7.0 | |
| Red Hat Fedora | =35 | |
| Debian Linux | =9.0 |
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Reference Links
- http://www.pgbouncer.org/changelog.html#pgbouncer-116x
- https://bugzilla.redhat.com/show_bug.cgi?id=2021251
- https://lists.debian.org/debian-lts-announce/2022/02/msg00016.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TNPCV3KRDI5PLLLKADFVIOHACQJLZMLI/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TNPCV3KRDI5PLLLKADFVIOHACQJLZMLI/
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2023785
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2023784
Frequently Asked Questions
What is CVE-2021-3935?
CVE-2021-3935 is a vulnerability in PgBouncer that allows a man-in-the-middle attacker to inject arbitrary SQL queries.
What is the severity of CVE-2021-3935?
CVE-2021-3935 has a severity rating of 8.1 (high).
Which versions of PgBouncer are affected by CVE-2021-3935?
PgBouncer versions prior to 1.16.1 are affected by CVE-2021-3935.
How can a man-in-the-middle attacker exploit CVE-2021-3935?
A man-in-the-middle attacker can exploit CVE-2021-3935 by injecting arbitrary SQL queries when a connection is first established.
Are there any known references for CVE-2021-3935?
Yes, you can find references for CVE-2021-3935 at the following links: [Link1](http://www.pgbouncer.org/changelog.html#pgbouncer-116x), [Link2](https://bugzilla.redhat.com/show_bug.cgi?id=2021251), [Link3](https://lists.debian.org/debian-lts-announce/2022/02/msg00016.html)
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