CVE-2019-9900

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.

Score

CVSS 3.1 8.3 High

Status

Modified - cve@mitre.org

Published

2019-04-25

Last modified

2024-08-04

Weaknesses

CWE-74

Affected products

• Envoy (Envoyproxy)
• Openshift Service Mesh (Redhat)

References

• https://access.redhat.com/errata/RHSA-2019:0741
• https://github.com/envoyproxy/envoy/issues/6434
• https://github.com/envoyproxy/envoy/security/advisories/GHSA-x74r-f4mw-c32h
• https://groups.google.com/forum/#%21topic/envoy-announce/VoHfnDqZiAM
• https://www.envoyproxy.io/docs/envoy/v1.9.1/intro/version_history