CVE-2023-35944
8.2 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
5.4 Medium
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
20.9%
Envoy is an open source edge and service proxy designed for cloud-native applications. Envoy allows mixed-case schemes in HTTP/2, however, some internal scheme checks are case-sensitive. Prior to versions 1.27.0, 1.26.4, 1.25.9, 1.24.10, and 1.23.12, this can lead to the rejection of requests with mixed-case schemes such as htTp or htTps, or the bypassing of some requests such as https in unencrypted connections. With a fix in versions 1.27.0, 1.26.4, 1.25.9, 1.24.10, and 1.23.12, Envoy will now lowercase scheme values by default, and change the internal scheme checks that were case-sensitive to be case-insensitive. There are no known workarounds for this issue.
Affected configurations
| Vendor | Product | Version | CPE |
|---|---|---|---|
| envoyproxy | envoy | * | cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:* |
| envoyproxy | envoy | * | cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:* |
| envoyproxy | envoy | * | cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:* |
| envoyproxy | envoy | * | cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:* |
CNA Affected
[
{
"vendor": "envoyproxy",
"product": "envoy",
"versions": [
{
"version": ">= 1.26.0, < 1.26.4",
"status": "affected"
},
{
"version": ">= 1.25.0, < 1.25.9",
"status": "affected"
},
{
"version": ">= 1.24.0, < 1.24.10",
"status": "affected"
},
{
"version": "< 1.23.12",
"status": "affected"
}
]
}
]Related
8.2 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
5.4 Medium
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
20.9%