CVE-2020-15104
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- CVE-2020-15104
CVE Details
| Release Date: | 2020-07-14 |
Description
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.
See more information about CVE-2020-15104 from MITRE CVE dictionary and NIST NVD
CVSS v3.0 metrics
NOTE: The following CVSS v3.0 metrics and score provided are preliminary and subject to review.
| Base Score: | 5.4 | Base Metrics: | AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N |
| Access Vector: | Network | Attack Complexity: | Low |
| Privileges Required: | Low | User Interaction: | None |
| Scope: | Unchanged | Confidentiality Impact: | Low |
| Integrity Impact: | Low | Availability Impact: | None |
Errata information
| Platform | Errata | Release Date |
| Oracle Linux version 7 (istio) | ELSA-2020-5765 | 2020-07-22 |
| Oracle Linux version 7 (kata) | ELSA-2020-5765 | 2020-07-22 |
| Oracle Linux version 7 (kata-image) | ELSA-2020-5765 | 2020-07-22 |
| Oracle Linux version 7 (kata-runtime) | ELSA-2020-5765 | 2020-07-22 |
| Oracle Linux version 7 (kernel-uek-container) | ELSA-2020-5765 | 2020-07-22 |
| Oracle Linux version 7 (kubernetes) | ELSA-2020-5765 | 2020-07-22 |
| Oracle Linux version 7 (olcne) | ELSA-2020-5765 | 2020-07-22 |
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