CVE Vulnerability

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.

7.5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 6.4

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

Scope

8.3 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact LOW

Scope CHANGED

References
Link Resource
https://www.envoyproxy.io/docs/envoy/v1.9.1/intro/version_history Release Notes Vendor Advisory
https://github.com/envoyproxy/envoy/issues/6434 Exploit Issue Tracking
https://groups.google.com/forum/#!topic/envoy-announce/VoHfnDqZiAM Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:0741 Third Party Advisory
https://github.com/envoyproxy/envoy/security/advisories/GHSA-x74r-f4mw-c32h Exploit Mitigation
Configurations

Configuration 1

cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*
cpe:2.3:a:redhat:openshift_service_mesh:-:*:*:*:*:*:*:*
Information

Published : 2019-04-25 03:29

Updated : 2022-01-01 08:16

NVD link : CVE-2019-9900

Mitre link : CVE-2019-9900

Products Affected
No products.
CWE
CWE-74