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CVE-2021-3935

Date: November 22, 2021

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.

Language: C

Severity Score

Related Resources (10)

https://nvd.nist.gov/vuln/detail/CVE-2021-3935
http://www.pgbouncer.org/changelog.html#pgbouncer-116x
https://github.com/pgbouncer/pgbouncer/commit/e4453c9151a2f5af0a9cb049b302a3f9f9654453
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TNPCV3KRDI5PLLLKADFVIOHACQJLZMLI/
https://lists.debian.org/debian-lts-announce/2022/02/msg00016.html
https://security-tracker.debian.org/tracker/CVE-2021-3935
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-3935
https://bugzilla.redhat.com/show_bug.cgi?id=2021251
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TNPCV3KRDI5PLLLKADFVIOHACQJLZMLI/
https://www.mend.io/vulnerability-database/CVE-2021-3935

Severity Score

Weakness Type (CWE)

Improper Certificate Validation

CWE-295

Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

CWE-89

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): HIGH
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): PARTIAL
Availability (A): PARTIAL
Additional information:

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