CVE-2023-0464: Excessive Resource Usage Verifying X.509 Policy Constraints

Affected versions

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

• openssl openssl1.0.2 and later · before 1.0.2zh
• openssl openssl1.1.1 and later · before 1.1.1u
• openssl openssl3.0.0 and later · before 3.0.9
• openssl openssl3.1.0 and later · before 3.1.1

Versions reported by the vendor

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

• OpenSSL OpenSSL

  • 3.1.0 and later · before 3.1.1affected · semver
  • 3.0.0 and later · before 3.0.9affected · semver
  • 1.1.1 and later · before 1.1.1uaffected
  • 1.0.2 and later · before 1.0.2zhaffected

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-2014-0160The (1) TLS and (2) DTLS implementations in OpenSSL 1.0.1 before 1.0.1g do not properly handle Heartbeat Extension packets, which allows remKEV
  90Now
• CVE-2021-3711SM2 Decryption Buffer Overflow
  65This week
• CVE-2003-0545Double free vulnerability in OpenSSL 0.9.7 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code
  65This week

Published before and after this one in the same product

• ← EarlierCVE-2023-0286Feb 8, 2023 · X.400 address type confusion in X.509 GeneralName
  50Plan
• ← EarlierCVE-2022-4203Feb 24, 2023 · X.509 Name Constraints Read Buffer Overflow
  19Monitor
• Later →CVE-2023-0465Mar 28, 2023 · Invalid certificate policies in leaf certificates are silently ignored
  22Monitor

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.