Debian: DSA-4422-1: apache2 security update

    Date 03 Apr 2019
    5151
    Posted By LinuxSecurity Advisories
    Several vulnerabilities have been found in the Apache HTTP server. CVE-2018-17189
    
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    Debian Security Advisory DSA-4422-1                   This email address is being protected from spambots. You need JavaScript enabled to view it.
    https://www.debian.org/security/                           Stefan Fritsch
    April 03, 2019                        https://www.debian.org/security/faq
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    Package        : apache2
    CVE ID         : CVE-2018-17189 CVE-2018-17199 CVE-2019-0196 CVE-2019-0211 
                     CVE-2019-0217 CVE-2019-0220
    Debian Bug     : 920302 920303
    
    Several vulnerabilities have been found in the Apache HTTP server.
    
    CVE-2018-17189
    
        Gal Goldshtein of F5 Networks discovered a denial of service
        vulnerability in mod_http2. By sending malformed requests, the
        http/2 stream for that request unnecessarily occupied a server
        thread cleaning up incoming data, resulting in denial of service.
    
    CVE-2018-17199
    
        Diego Angulo from ImExHS discovered that mod_session_cookie does not
        respect expiry time.
    
    CVE-2019-0196
    
        Craig Young discovered that the http/2 request handling in mod_http2
        could be made to access freed memory in string comparison when
        determining the method of a request and thus process the request
        incorrectly.
    
    CVE-2019-0211
    
        Charles Fol discovered a privilege escalation from the
        less-privileged child process to the parent process running as root.
    
    CVE-2019-0217
    
        A race condition in mod_auth_digest when running in a threaded
        server could allow a user with valid credentials to authenticate
        using another username, bypassing configured access control
        restrictions. The issue was discovered by Simon Kappel.
    
    CVE-2019-0220
    
        Bernhard Lorenz of Alpha Strike Labs GmbH reported that URL
        normalizations were inconsistently handled. When the path component
        of a request URL contains multiple consecutive slashes ('/'),
        directives such as LocationMatch and RewriteRule must account for
        duplicates in regular expressions while other aspects of the servers
        processing will implicitly collapse them.
    
    For the stable distribution (stretch), these problems have been fixed in
    version 2.4.25-3+deb9u7.
    
    This update also contains bug fixes that were scheduled for inclusion in the
    next stable point release. This includes a fix for a regression caused by a
    security fix in version 2.4.25-3+deb9u6.
    
    We recommend that you upgrade your apache2 packages.
    
    For the detailed security status of apache2 please refer to its security
    tracker page at: https://security-tracker.debian.org/tracker/apache2
    
    Further information about Debian Security Advisories, how to apply
    these updates to your system and frequently asked questions can be
    found at: https://www.debian.org/security/
    
    Mailing list: This email address is being protected from spambots. You need JavaScript enabled to view it.
    

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