CVE-2019-9900 | BDVDB-2026-115757 Detail
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.
Impact#
Per CVSS v3.0: confidentiality impact low, integrity impact low, availability impact low. Attack vector: network.
Weaknesses#
No weakness recorded in the source data.
References#
- https://access.redhat.com/errata/RHSA-2019:0741
- https://www.envoyproxy.io/docs/envoy/v1.9.1/intro/version_history
- https://github.com/envoyproxy/envoy/issues/6434
- https://groups.google.com/forum/#%21topic/envoy-announce/VoHfnDqZiAM
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-x74r-f4mw-c32h
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.
- Version 2Most recent update recorded in the CVE List.