CVE-2022-39948: An improper certificate validation vulnerability [CWE-295] in FortiOS 7.2.0 through 7.2.3, 7.0.0 through 7.0.7, 6.4 all versions, 6.2 all ve

Affected versions

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

• fortinet fortios6.0.0 and later · before 7.0.8
• fortinet fortios7.2.0 and later · before 7.2.4

Versions reported by the vendor

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

• Fortinet FortiOS

  • 7.2.0 and later · up to and including 7.2.3affected · semver
  • 7.0.0 and later · up to and including 7.0.7affected · semver
  • 6.4.0 and later · up to and including 6.4.11affected · semver
  • 6.2.0 and later · up to and including 6.2.12affected · semver
  • 6.0.0 and later · up to and including 6.0.16affected · semver

• Fortinet FortiProxy

  • 7.0.0 and later · up to and including 7.0.6affected · semver
  • 2.0.0 and later · up to and including 2.0.11affected · semver
  • 1.2.0 and later · up to and including 1.2.13affected · semver

Other highest-scoring records for the same primary product.

• CVE-2022-40684An authentication bypass using an alternate path or channel [CWE-288] in Fortinet FortiOS version 7.2.0 through 7.2.1 and 7.0.0 through 7.0.KEV
  99Now
• CVE-2018-13379An Improper Limitation of a Pathname to a Restricted Directory ("Path Traversal") in Fortinet FortiOS 6.0.0 to 6.0.4, 5.6.3 to 5.6.7 and 5.4KEV
  99Now
• CVE-2024-55591An Authentication Bypass Using an Alternate Path or Channel vulnerability [CWE-288] affecting FortiOS version 7.0.0 through 7.0.16 and FortiKEV
  97Now

Published before and after this one in the same product

• ← EarlierCVE-2022-29054Feb 16, 2023 · A missing cryptographic steps vulnerability [CWE-325] in the functions that encrypt the DHCP and DNS keys in Fortinet FortiOS version 7.2.0,
  13Monitor
• ← EarlierCVE-2022-38378Feb 16, 2023 · An improper privilege management vulnerability [CWE-269] in Fortinet FortiOS version 7.2.0 and before 7.0.7 and FortiProxy version 7.2.0 thr
  24Monitor
• Later →CVE-2022-42472Feb 16, 2023 · A improper neutralization of crlf sequences in http headers ('http response splitting') vulnerability in Fortinet FortiOS 7.2.0 through 7.2.
  21Monitor

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.