// For flags

CVE-2025-30157

Envoy crashes when HTTP ext_proc processes local replies

Severity Score

6.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track*
*SSVC
Descriptions

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.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:Track*
Exploitation
Poc
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2025-03-17 CVE Reserved
  • 2025-03-21 CVE Published
  • 2025-03-21 CVE Updated
  • 2025-04-02 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-460: Improper Cleanup on Thrown Exception
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Envoyproxy
Search vendor "Envoyproxy"
Envoy
Search vendor "Envoyproxy" for product "Envoy"
>= 1.33.0 < 1.33.1
Search vendor "Envoyproxy" for product "Envoy" and version " >= 1.33.0 < 1.33.1"
en
Affected
Envoyproxy
Search vendor "Envoyproxy"
Envoy
Search vendor "Envoyproxy" for product "Envoy"
>= 1.32.0 < 1.32.4
Search vendor "Envoyproxy" for product "Envoy" and version " >= 1.32.0 < 1.32.4"
en
Affected
Envoyproxy
Search vendor "Envoyproxy"
Envoy
Search vendor "Envoyproxy" for product "Envoy"
>= 1.31.0 < 1.31.6
Search vendor "Envoyproxy" for product "Envoy" and version " >= 1.31.0 < 1.31.6"
en
Affected
Envoyproxy
Search vendor "Envoyproxy"
Envoy
Search vendor "Envoyproxy" for product "Envoy"
< 1.30.10
Search vendor "Envoyproxy" for product "Envoy" and version " < 1.30.10"
en
Affected