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CVE

CWE

Training

CVE-2019-9900

Published: Apr 25, 2019

Modified: Aug 4, 2024

PUBLISHED

CVSS v3.0

6.5

MEDIUM

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.

Vendor	Product	Versions
n/a	n/a	affected `n/a`

CVSS v3.0 Details

CVSS v3.0 Vector

CVSS:3.0/AC:H/AV:N/A:L/C:L/I:L/PR:N/S:C/UI:N

Attack Complexity

High

Attack Vector

Network

Availability

Low

Confidentiality

Low

Integrity

Low

Privileges Required

None

Scope

Changed

User Interaction

None

References

vendor-advisory

x_refsource_REDHAT

https://www.envoyproxy.io/docs/envoy/v1.9.1/intro/version_history

x_refsource_CONFIRM

https://github.com/envoyproxy/envoy/issues/6434

x_refsource_CONFIRM

https://groups.google.com/forum/#%21topic/envoy-announce/VoHfnDqZiAM

x_refsource_CONFIRM

https://github.com/envoyproxy/envoy/security/advisories/GHSA-x74r-f4mw-c32h

x_refsource_CONFIRM

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CVE-2019-9900 | MEDIUM (6.5) - Security Vulnerability | QwikSec