ESB-2019.0192 - [Win][UNIX/Linux] Apache httpd: Multiple vulnerabilities 2019-01-23

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.0192
                   Apache httpd multiple vulnerabilities
                              23 January 2019

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Apache httpd
Publisher:         Apache
Operating System:  UNIX variants (UNIX, Linux, OSX)
                   Windows
Impact/Access:     Denial of Service   -- Remote/Unauthenticated
                   Unauthorised Access -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-0190 CVE-2018-17199 CVE-2018-17189

Original Bulletin: 
   https://httpd.apache.org/security/vulnerabilities_24.html

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CVE-2019-0190: mod_ssl 2.4.37 remote DoS when used with OpenSSL 1.1.1

Severity: Important

Vendor: The Apache Software Foundation

Versions Affected:
httpd 2.4.37

Description:
A bug exists in the way mod_ssl handled client renegotiations.
A remote attacker could send a carefully crafted request that
would cause mod_ssl to enter a loop leading to a denial of
service.  This bug can be only triggered with Apache HTTP Server
version 2.4.37 when using OpenSSL version 1.1.1 or later, due to
an interaction in changes to handling of renegotiation attempts.

Mitigation:
All httpd users consuming mod_ssl combined with OpenSSL 1.1.1 or later
should upgrade to 2.4.38 or later.

Credit:
The issue was identified through user bug reports.

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

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CVE-2018-17199: mod_session_cookie does not respect expiry time

Severity: low

Vendor: The Apache Software Foundation

Versions Affected:
httpd 2.4.0 to 2.4.37

Description:
In Apache HTTP Server 2.4 release 2.4.37 and prior, mod_session
checks the session expiry time before decoding the session.
This causes session expiry time to be ignored for
mod_session_cookie sessions since the expiry time is loaded
when the session is decoded.

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

Credit:
The issue was discovered by Diego Angulo from ImExHS.

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

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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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