Published At-14 Jul, 2020 | 22:15
Updated At-21 Jul, 2020 | 13:44
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.
CISA Catalog
| Date Added | Due Date | Vulnerability Name | Required Action |
|---|
| N/A | | |
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
| Type | Version | Base score | Base severity | Vector |
|---|
| Primary | 3.1 | 5.4 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N |
| Secondary | 3.1 | 4.6 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N |
| Primary | 2.0 | 5.5 | MEDIUM | AV:N/AC:L/Au:S/C:P/I:P/A:N |
Type: Primary
Version: 3.1
Base score: 5.4
Base severity: MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Type: Secondary
Version: 3.1
Base score: 4.6
Base severity: MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
Type: Primary
Version: 2.0
Base score: 5.5
Base severity: MEDIUM
Vector: AV:N/AC:L/Au:S/C:P/I:P/A:N
Weaknesses
| CWE ID | Type | Source |
|---|
| CWE-346 | Primary | nvd@nist.gov |
| CWE-346 | Secondary | security-advisories@github.com |
Type: Primary
Source: nvd@nist.gov
Type: Secondary
Source: security-advisories@github.com
Change History
0Changes found