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List:       oss-security
Subject:    [oss-security] CVE-2018-17189: mod_http2, DoS via slow, unneeded request bodies
From:       Daniel Ruggeri <druggeri () apache ! org>
Date:       2019-01-22 17:40:31
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CVE-2018-17189: mod_http2, DoS via slow, unneeded request bodies

Severity: Low

Vendor: The Apache Software Foundation

Versions Affected:
httpd 2.4.17 to 2.4.37

Description:
By sending request bodies in a slow loris way to plain 
resources, the h2 stream for that request unnecessarily
occupied a server thread cleaning up that incoming data.
This affects only HTTP/2 (mod_http2) connections in 
Apache HTTP Server versions 2.4.37 and prior.

Mitigation:
All httpd users deploying mod_http2 should upgrade to 2.4.38 or later.

Credit:
The issue was discovered by Gal Goldshtein of F5 Networks.

References:
https://httpd.apache.org/security/vulnerabilities_24.html

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