CVE-2019-9900
High
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.
SeverityHigh
CVSS8.3
Exploit probability—
Product
Envoy
PublishedApr 25, 2019
First seenApr 25, 2019
How to fix
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| envoyproxy envoy | v ≤ 1.9.0 | — |
| redhat openshift_service_mesh | No range specified | — |
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