envoyproxy envoy up to 1.26.6/1.27.2/1.28.0/1.29.0 Downstream ext_authz access control

Summaryinfo

A vulnerability, which was classified as critical, has been found in envoyproxy envoy up to 1.26.6/1.27.2/1.28.0/1.29.0. This issue affects the function ext_authz of the component Downstream Handler. This manipulation causes access control. This vulnerability is registered as CVE-2024-23324. Remote exploitation of the attack is possible. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in envoyproxy envoy up to 1.26.6/1.27.2/1.28.0/1.29.0 (Firewall Software) and classified as critical. Affected by this vulnerability is the function ext_authz of the component Downstream Handler. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. As an impact it is known to affect confidentiality. The summary by CVE is:

Envoy is a high-performance edge/middle/service proxy. External authentication can be bypassed by downstream connections. Downstream clients can force invalid gRPC requests to be sent to ext_authz, circumventing ext_authz checks when failure_mode_allow is set to true. This issue has been addressed in released 1.29.1, 1.28.1, 1.27.3, and 1.26.7. Users are advised to upgrade. There are no known workarounds for this vulnerability.

The weakness was published 02/10/2024 as GHSA-gq3v-vvhj-96j6. The advisory is shared at github.com. This vulnerability is known as CVE-2024-23324 since 01/15/2024. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1068 for this issue.

Upgrading to version 1.26.7, 1.27.3, 1.28.1 or 1.29.1 eliminates this vulnerability. Applying the patch 29989f6cc8bfd8cd2ffcb7c42711eb02c7a5168a is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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

Productinfo

Type

• Firewall Software

Vendor

• envoyproxy

Name

• envoy

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13
• 1.14
• 1.15
• 1.16
• 1.17
• 1.18
• 1.19
• 1.20
• 1.21
• 1.22
• 1.23
• 1.24
• 1.25
• 1.26
• 1.26.0
• 1.26.1
• 1.26.2
• 1.26.3
• 1.26.4
• 1.26.5
• 1.26.6
• 1.27
• 1.27.0
• 1.27.1
• 1.27.2
• 1.28
• 1.28.0
• 1.29.0

License

• free

Website

• Product: https://github.com/envoyproxy/envoy/

CPE 2.3info

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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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