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Date: Mon, 01 Apr 2019 20:31:24 -0500
From: Daniel Ruggeri <druggeri@...che.org>
To: oss-security@...ts.openwall.com
Subject: CVE-2019-0197: mod_http2, possible crash on late upgrade
CVE-2019-0197: mod_http2, possible crash on late upgrade
Severity: Low
Vendor: The Apache Software Foundation
Versions Affected:
httpd 2.4.34 to 2.4.38
Description:
When HTTP/2 was enabled for a http: host or H2Upgrade was enabled for h2
on a https: host, an Upgrade request from http/1.1 to http/2 that was
not the first request on a connection could lead to a misconfiguration
and crash. Servers that never enabled the h2 protocol or only enabled it
for https: and did not set"H2Upgrade on" are unaffected by this issue.
Mitigation:
All httpd users deploying mod_http2 should upgrade to 2.4.39 or later.
Credit:
The issue was discovered by Stefan Eissing, greenbytes.de.
References:
https://httpd.apache.org/security/vulnerabilities_24.html
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