Lynx does not verify that the server's certificate is signed by a trusted certification authority, which allows man-in-the-middle attackers

Affected versions

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

• canonical ubuntu linux10.04
• canonical ubuntu linux11.10
• canonical ubuntu linux12.04
• canonical ubuntu linux12.10
• lynx lynxall versions

Other highest-scoring records for the same primary product.

• CVE-2008-4690lynx 2.8.6dev.15 and earlier, when advanced mode is enabled and lynx is configured as a URL handler, allows remote attackers to execute arbi
  42Plan
• CVE-2016-9179lynx: It was found that Lynx doesn't parse the authority component of the URL correctly when the host name part ends with '?', and could ins
  31Monitor
• CVE-2010-2810Heap-based buffer overflow in the convert_to_idna function in WWW/Library/Implementation/HTParse.c in Lynx 2.8.8dev.1 through 2.8.8dev.4 all
  28Monitor
• CVE-2006-7234Untrusted search path vulnerability in Lynx before 2.8.6rel.4 allows local users to execute arbitrary code via malicious (1) .mailcap and (2
  18Monitor

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.