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.
The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data.
The product does not validate, or incorrectly validates, a certificate.
| Link | Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=2021251 | issue tracking third party advisory |
| http://www.pgbouncer.org/changelog.html#pgbouncer-116x | release notes vendor advisory |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TNPCV3KRDI5PLLLKADFVIOHACQJLZMLI/ | vendor advisory |
| https://lists.debian.org/debian-lts-announce/2022/02/msg00016.html | third party advisory mailing list |