CVE-2019-9900

State: Published
Severity: 6.5 Medium
Published: Apr 25, 2019
Updated: Aug 4, 2024
Reserved: Mar 21, 2019

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.

Scores

CVSS	Score	Vector	Source
3.0	6.5 Medium	CVSS:3.0/AC:H/AV:N/A:L/C:L/I:L/PR:N/S:C/UI:N	mitre

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
n/an/a	n/aAffected

References

RHSA-2019:0741vendor-advisory
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

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