CVE-2020-15104 (Medium) detected in envoy-wasmae02dc6bdd5c5ea61c3869395d81689e34988156

[mend-bolt-for-github]

CVE-2020-15104 - Medium Severity Vulnerability

Vulnerable Library - envoy-wasmae02dc6bdd5c5ea61c3869395d81689e34988156

*ATTENTION!: The content of this repo is merged into https://github.com/envoyproxy/envoy and future development is happening there.

Library home page: https://github.com/envoyproxy/envoy-wasm.git

Found in HEAD commit: 320650059a0b0796f39380aaca16815f2f8a4625

Found in base branch: master

Vulnerable Source Files (1)

envoy/source/common/runtime/runtime_features.cc

Vulnerability Details

In Envoy before versions 1.12.6, 1.13.4, 1.14.4, and 1.15.0 when validating TLS certificates, Envoy would incorrectly allow a wildcard DNS Subject Alternative Name apply to multiple subdomains. For example, with a SAN of *.example.com, Envoy would incorrectly allow nested.subdomain.example.com, when it should only allow subdomain.example.com. This defect applies to both validating a client TLS certificate in mTLS, and validating a server TLS certificate for upstream connections. This vulnerability is only applicable to situations where an untrusted entity can obtain a signed wildcard TLS certificate for a domain of which you only intend to trust a subdomain of. For example, if you intend to trust api.mysubdomain.example.com, and an untrusted actor can obtain a signed TLS certificate for *.example.com or *.com. Configurations are vulnerable if they use verify_subject_alt_name in any Envoy version, or if they use match_subject_alt_names in version 1.14 or later. This issue has been fixed in Envoy versions 1.12.6, 1.13.4, 1.14.4, 1.15.0.

Publish Date: 2020-07-14

URL: CVE-2020-15104

CVSS 3 Score Details (5.4)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: Low
  • User Interaction: None
  • Scope: Unchanged
• Impact Metrics:
  • Confidentiality Impact: Low
  • Integrity Impact: Low
  • Availability Impact: None

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Origin: GHSA-w5f5-6qhq-hhrg

Release Date: 2020-07-14

Fix Resolution: 1.12.6,1.13.4,1.14.4,1.15.0

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