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)

Vulnerability/
CVE-2021-3935

high

8.1

CWE

295 89

22/11/2021

26/6/2023

CVE-2021-3935: SQL Injection

First published: Mon Nov 22 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. This flaw affects PgBouncer versions prior to 1.16.1.

Credit: patrick@puiterwijk.org

Affected Software	Affected Version	How to fix
Pgbouncer Pgbouncer	<1.16.1
Redhat Enterprise Linux	=7.0
Fedoraproject Fedora	=35
Debian Debian Linux	=9.0

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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)

collector/nvd-index
agent/severity
agent/weakness
agent/references
agent/author
agent/type
agent/event
vendor/pgbouncer
canonical/pgbouncer pgbouncer
vendor/redhat
canonical/redhat enterprise linux
version/redhat enterprise linux/7.0
vendor/fedoraproject
canonical/fedoraproject fedora
version/fedoraproject fedora/35
vendor/debian
canonical/debian debian linux
version/debian debian linux/9.0

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