Vulnerability Monitor

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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.

Published

2019-04-25T15:29:01.497

Last Modified

2024-11-21T04:52:32.300

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 8.3 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:P/I:P/A:P

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

6.4

Weaknesses

Type: Primary
CWE-74

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	envoyproxy	envoy	≤ 1.9.0	Yes
Application	redhat	openshift_service_mesh	-	Yes

References

https://access.redhat.com/errata/RHSA-2019:0741 Third Party Advisory ([email protected])
https://github.com/envoyproxy/envoy/issues/6434 Exploit, Issue Tracking, Third Party Advisory ([email protected])
https://github.com/envoyproxy/envoy/security/advisories/GHSA-x74r-f4mw-c32h Exploit, Mitigation, Third Party Advisory ([email protected])
https://groups.google.com/forum/#%21topic/envoy-announce/VoHfnDqZiAM ([email protected])
https://www.envoyproxy.io/docs/envoy/v1.9.1/intro/version_history Release Notes, Vendor Advisory ([email protected])
https://access.redhat.com/errata/RHSA-2019:0741 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/envoyproxy/envoy/issues/6434 Exploit, Issue Tracking, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/envoyproxy/envoy/security/advisories/GHSA-x74r-f4mw-c32h Exploit, Mitigation, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://groups.google.com/forum/#%21topic/envoy-announce/VoHfnDqZiAM (af854a3a-2127-422b-91ae-364da2661108)
https://www.envoyproxy.io/docs/envoy/v1.9.1/intro/version_history Release Notes, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)