Envoy up to 1.22.8/1.23.5/1.24.3/1.25.2 OAuth Filter denial of service

Summaryinfo

A vulnerability identified as problematic has been detected in Envoy up to 1.22.8/1.23.5/1.24.3/1.25.2. Affected by this vulnerability is an unknown functionality of the component OAuth Filter. Performing a manipulation results in denial of service. This vulnerability is identified as CVE-2023-27496. The attack can be initiated remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Envoy up to 1.22.8/1.23.5/1.24.3/1.25.2. It has been classified as problematic. This affects some unknown functionality of the component OAuth Filter. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. The summary by CVE is:

Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9, the OAuth filter assumes that a `state` query param is present on any response that looks like an OAuth redirect response. Sending it a request with the URI path equivalent to the redirect path, without the `state` parameter, will lead to abnormal termination of Envoy process. Versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9 contain a patch. The issue can also be mitigated by locking down OAuth traffic, disabling the filter, or by filtering traffic before it reaches the OAuth filter (e.g. via a lua script).

The weakness was released 04/05/2023 as GHSA-j79q-2g66-2xv5. The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2023-27496 since 03/01/2023. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

Upgrading to version 1.22.9, 1.23.6, 1.24.4, 1.25.3 or 1.26.0 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

• Envoy

Version

• 1.22.0
• 1.22.1
• 1.22.2
• 1.22.3
• 1.22.4
• 1.22.5
• 1.22.6
• 1.22.7
• 1.22.8
• 1.23.0
• 1.23.1
• 1.23.2
• 1.23.3
• 1.23.4
• 1.23.5
• 1.24.0
• 1.24.1
• 1.24.2
• 1.24.3
• 1.25.0
• 1.25.1
• 1.25.2

License

• free

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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