CVE-2024-23326: Envoy incorrectly accepts HTTP 200 response for entering upgrade mode
Envoy incorrectly accepts HTTP 200 response for entering upgrade mode
Other sources
Envoy is a cloud-native, open source edge and service proxy. A theoretical request smuggling vulnerability exists through Envoy if a server can be tricked into adding an upgrade header into a response. Per RFC https://www.rfc-editor.org/rfc/rfc7230#section-6.7 a server sends 101 when switching protocols. Envoy incorrectly accepts a 200 response from a server when requesting a protocol upgrade, but 200 does not indicate protocol switch. This opens up the possibility of request smuggling through Envoy if the server can be tricked into adding the upgrade header to the response.
— MITRE
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2024-23326?
CVE-2024-23326 has been assigned a risk rating indicating potential vulnerability in Envoy proxy that could allow HTTP request smuggling.
How do I fix CVE-2024-23326?
To fix CVE-2024-23326, upgrade your Envoy proxy to version 1.27.6, 1.29.5, or 1.30.2.
Which versions of Envoy are affected by CVE-2024-23326?
CVE-2024-23326 affects Envoy versions up to 1.30.1, 1.29.4, and 1.27.5.
Can CVE-2024-23326 impact production environments?
Yes, CVE-2024-23326 can potentially impact production environments by allowing unauthorized HTTP request smuggling.
Is CVE-2024-23326 a known exploitation?
As of now, there are no known exploitations reported for CVE-2024-23326.