Detections
Analytics
CVE-2019-9900
high
Description
When parsing HTTP/1.x header values, Envoy 1.9.0 and before does not reject embedded zero characters (NUL, ASCII 0x0). This allows remote attackers crafting header values containing embedded NUL characters to potentially bypass header matching rules, gaining access to unauthorized resources.
References
https://www.envoyproxy.io/docs/envoy/v1.9.1/intro/version_history
https://groups.google.com/forum/#%21topic/envoy-announce/VoHfnDqZiAM
https://github.com/envoyproxy/envoy/security/advisories/GHSA-x74r-f4mw-c32h