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.

CVSS v3.0 8.3 HIGH
CVSS v2.0 7.5 HIGH

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

7.5^/10

CVSS v2.0 : HIGH

V2 Legend

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

Exploitability : 10.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

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 Third Party Advisory
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 Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*

Configuration 2 (hide)

cpe:2.3:a:redhat:openshift_service_mesh:-:*:*:*:*:*:*:*

Information

Published : 2019-04-25 08:29

Updated : 2022-01-01 12:16

NVD link : CVE-2019-9900

Mitre link : CVE-2019-9900

JSON object : View

CWE

CWE-74

Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

Products Affected

envoyproxy

envoy

redhat

openshift_service_mesh

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8.3 /10