Envoy up to 1.30.9/1.31.5/1.32.3/1.33.0 Websocket Handshake cleanup

Summaryinfo

A vulnerability was found in Envoy up to 1.30.9/1.31.5/1.32.3/1.33.0. It has been rated as problematic. This issue affects some unknown processing of the component Websocket Handshake Handler. This manipulation causes cleanup. This vulnerability is handled as CVE-2025-30157. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as problematic was found in Envoy up to 1.30.9/1.31.5/1.32.3/1.33.0. Affected by this vulnerability is an unknown function of the component Websocket Handshake Handler. The manipulation with an unknown input leads to a cleanup vulnerability. The CWE definition for the vulnerability is CWE-460. The product does not clean up its state or incorrectly cleans up its state when an exception is thrown, leading to unexpected state or control flow. As an impact it is known to affect availability. The summary by CVE is:

Envoy is a cloud-native high-performance edge/middle/service proxy. Prior to 1.33.1, 1.32.4, 1.31.6, and 1.30.10, Envoy's ext_proc HTTP filter is at risk of crashing if a local reply is sent to the external server due to the filter's life time issue. A known situation is the failure of a websocket handshake will trigger a local reply leading to the crash of Envoy. This vulnerability is fixed in 1.33.1, 1.32.4, 1.31.6, and 1.30.10.

The advisory is shared at github.com. This vulnerability is known as CVE-2025-30157 since 03/17/2025. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 234331 (Amazon Linux 2023 : ecs-service-connect-agent (ALAS2023-2025-926)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.30.10, 1.31.6, 1.32.4 or 1.33.1 eliminates this vulnerability. Applying the patch 8eda1b8ef5ba8663d16a737ab99458c039a9b53c 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.

The vulnerability is also documented in the vulnerability database at Tenable (234331). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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
• 1.27
• 1.28
• 1.29
• 1.30
• 1.30.0
• 1.30.1
• 1.30.2
• 1.30.3
• 1.30.4
• 1.30.5
• 1.30.6
• 1.30.7
• 1.30.8
• 1.30.9
• 1.31
• 1.31.0
• 1.31.1
• 1.31.2
• 1.31.3
• 1.31.4
• 1.31.5
• 1.32
• 1.32.0
• 1.32.1
• 1.32.2
• 1.32.3
• 1.33.0

License

• free

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

CVSSv3info

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Exploitinginfo

Threat Intelligenceinfo

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Entryinfo

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

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