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.

Remediation

References

CVE-2019-9900

Related Vulnerabilities

PHP Other Vulnerability (CVE-2007-1412)

Contao Cross-Site Request Forgery (CSRF) Vulnerability (CVE-2019-10642)

mod_ssl Other Vulnerability (CVE-2004-0700)

Python Improper Neutralization of CRLF Sequences ('CRLF Injection') Vulnerability (CVE-2019-9740)

WordPress Plugin Embed Youtube Video SQL Injection (1.0)

Severity

High

Classification

CVE-2019-9900 CWE-20 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L

Tags

Missing Update Known Vulnerabilities