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                         AUSCERT Security Bulletin

                              ASB-2010.0181.2
                Apache HTTP Server (httpd) 2.2.16 Released
                               29 July 2010

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

Product:              Apache HTTPD
Operating System:     Windows
                      UNIX variants (UNIX, Linux, OSX)
Impact/Access:        Read-only Data Access -- Remote/Unauthenticated
                      Denial of Service     -- Remote/Unauthenticated
Resolution:           Patch/Upgrade
CVE Names:            CVE-2010-2068 CVE-2010-1452 
Member content until: Wednesday, August 25 2010
Reference:            ESB-2010.0531

Revision History:     July 29 2010: Additional vulnerability and CVE added
                      July 26 2010: Initial Release

OVERVIEW

        Apache HTTP Server (httpd) 2.2.16 has been released fixing a number of
        vulnerabilities.


IMPACT

        The Apache Software Foundation states that the 2.2.16 release 
        resolves the following security issues:
        
        "important: Timeout detection flaw (mod_proxy_http) CVE-2010-2068
        
        An information disclosure flaw was found in mod_proxy_http in 
        versions 2.2.9 through 2.2.15, 2.3.4-alpha and 2.3.5-alpha. Under 
        certain timeout conditions, the server could return a response 
        intended for another user. Only Windows, Netware and OS2 operating 
        systems are affected. Only those configurations which trigger the 
        use of proxy worker pools are affected. There was no vulnerability 
        on earlier versions, as proxy pools were not yet introduced. The 
        simplest workaround is to globally configure;
        
        SetEnv proxy-nokeepalive 1" [1]
        
        "low: mod_cache and mod_dav DoS CVE-2010-1452
        
        A flaw was found in the handling of requests by mod_cache and 
        mod_dav. A malicious remote attacker could send a carefully crafted 
        request and cause a httpd child process to crash. This crash would 
        only be a denial of service if using the worker MPM. This issue is 
        further mitigated as mod_dav is only affected by requests that are 
        most likely to be authenticated, and mod_cache is only affected if 
        the uncommon "CacheIgnoreURLSessionIdentifiers" directive, introduced 
        in version 2.2.14, is used." [1]


MITIGATION

        The Apache Software Foundation has made Apache http 2.2.16 available
        for download via it's websites and mirrors. [2]
        
        It is expected that vendors which package the Apache http 
        server will release updated packages shortly.


REFERENCES

        [1] Apache httpd 2.2 vulnerabilities
            http://httpd.apache.org/security/vulnerabilities_22.html

        [2] Downloading the Apache HTTP Server
            http://httpd.apache.org/download.cgi

AusCERT has made every effort to ensure that the information contained
in this document is accurate.  However, the decision to use the information
described is the responsibility of each user or organisation. The decision to
follow or act on information or advice contained in this security bulletin is
the responsibility of each user or organisation, and should be considered in
accordance with your organisation's site policies and procedures. AusCERT
takes no responsibility for consequences which may arise from following or
acting on information or advice contained in this security bulletin.

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Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours 
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
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