Bug 2350421 (CVE-2025-25294)

Summary: CVE-2025-25294 envoyproxy/gateway: Envoy Gateway Log Injection Vulnerability
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A log injection vulnerability was found in Envoy Gateway. In affected versions where a default Envoy Proxy access log configuration is used, an attacker may be able use a specially crafted user-agent to perform json injection. This can allow the attacker to modify the access log.
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Description OSIDB Bzimport 2025-03-06 19:01:13 UTC 
Envoy Gateway is an open source project for managing Envoy Proxy as a standalone or Kubernetes-based application gateway. In all Envoy Gateway versions prior to 1.2.7 and 1.3.1 a default Envoy Proxy access log configuration is used. This format is vulnerable to log injection attacks. If the attacker uses a specially crafted user-agent which performs json injection, then he could add and overwrite fields to the access log. This vulnerability is fixed in 1.3.1 and 1.2.7. One can overwrite the old text based default format with JSON formatter by modifying the "EnvoyProxy.spec.telemetry.accessLog" setting.