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.
Published 2021-11-22 16:15:07
Updated 2023-06-26 19:15:17
View at NVD,   CVE.org
Vulnerability category: Sql Injection

Exploit prediction scoring system (EPSS) score for CVE-2021-3935

0.10%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 41 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-3935

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
5.1
MEDIUM AV:N/AC:H/Au:N/C:P/I:P/A:P
4.9
6.4
NIST
8.1
HIGH CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
2.2
5.9
NIST

CWE ids for CVE-2021-3935

  • 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.
    Assigned by:
    • nvd@nist.gov (Primary)
    • patrick@puiterwijk.org (Secondary)
  • The product does not validate, or incorrectly validates, a certificate.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-3935

Products affected by CVE-2021-3935

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