Log Injection Vulnerability in Envoy Gateway by Envoy Proxy
CVE-2025-25294

5.3MEDIUM

Key Information:

Vendor

Envoyproxy

Status
Gateway
Vendor
CVE Published:
6 March 2025

What is CVE-2025-25294?

Envoy Gateway is an open source application that manages Envoy Proxy as either a standalone service or within a Kubernetes environment. Prior to versions 1.2.7 and 1.3.1, Envoy Gateway utilized a default access log configuration that was susceptible to log injection attacks. An attacker could exploit this by crafting a specially formatted user-agent that executes JSON injection, thereby gaining the ability to manipulate and overwrite fields within the access log. To mitigate this vulnerability, users should upgrade to versions 1.3.1 or 1.2.7, which address this security issue by allowing a transition from the default text-based log format to a more secure JSON formatter through adjustments to the 'EnvoyProxy.spec.telemetry.accessLog' configuration.

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Affected Version(s)

gateway >= 1.3.0-rc.1, < 1.3.1 < 1.3.0-rc.1, 1.3.1

gateway < 1.2.7 < 1.2.7

References

https://github.com/envoyproxy/gateway/security/advisories...
x_refsource_CONFIRM
https://github.com/envoyproxy/gateway/commit/8f48f5199cf1...
x_refsource_MISC

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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