envoyproxy envoy CVE-2019-9900 in Envoyproxy and Red Hat Products
Published on April 25, 2019

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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.

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Products Associated with CVE-2019-9900

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Envoyproxy Envoy
Red Hat Openshift Service Mesh

Exploit Probability

EPSS
3.73%
Percentile
89.88%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.