Jenkins Mailer Plugin 1.32 and earlier does not perform hostname validation when connecting to the configured SMTP server.

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

• jenkins mailerup to 1.32 inclusive

Versions reported by the vendor

Affected version ranges reported by the assigning authority (jenkins). Independent of NVD's CPE analysis and usually ahead of it.

• Jenkins project Jenkins Mailer Plugin

  • 1.29.1, 1.31.1not affected
  • unspecified and later · up to and including 1.32affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Other highest-scoring records for the same primary product.

• CVE-2018-8718Cross-site request forgery (CSRF) vulnerability in the Mailer Plugin 1.20 for Jenkins 2.111 allows remote authenticated users to send unauth
  34Monitor
• CVE-2022-20614A missing permission check in Jenkins Mailer Plugin 391.ve4a_38c1b_cf4b_ and earlier allows attackers with Overall/Read access to use the DN
  17Monitor
• CVE-2022-20613A cross-site request forgery (CSRF) vulnerability in Jenkins Mailer Plugin 391.ve4a_38c1b_cf4b_ and earlier allows attackers to use the DNS
  17Monitor

Published before and after this one in the same product

• ← EarlierCVE-2017-2651Jul 27, 2018 · jenkins-mailer-plugin before version 1.20 is vulnerable to an information disclosure while using the feature to send emails to a dynamically
  14Monitor

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Root cause

A certificate validation error is silently swallowed instead of terminating the connection. Often, code added for a test environment makes its way into production.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1override fun checkServerTrusted(chain: Array<X509Certificate>, type: String) {2  // Left empty for the test environment3}

1val client = OkHttpClient.Builder()2  .certificatePinner(3    CertificatePinner.Builder()4      .add("api.sirius.example", "sha256/…")5      .build()6  ).build()

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.