CVE-2019-9900

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.

Weakness classification

• CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

Primary references

• cve@mitre.org — Third Party Advisory
• cve@mitre.org — Exploit, Issue Tracking, Third Party Advisory
• cve@mitre.org — Exploit, Mitigation, Third Party Advisory
• cve@mitre.org
• cve@mitre.org — Release Notes, Vendor Advisory
• af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory
• af854a3a-2127-422b-91ae-364da2661108 — Exploit, Issue Tracking, Third Party Advisory
• af854a3a-2127-422b-91ae-364da2661108 — Exploit, Mitigation, Third Party Advisory
• af854a3a-2127-422b-91ae-364da2661108
• af854a3a-2127-422b-91ae-364da2661108 — Release Notes, Vendor Advisory