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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2009.1495 Security Vulnerabilities in the Apache 2 "mod_perl2" Module Components "PerlRun.pm" and "Status.pm" May Lead to Denial of Service (DoS) or Unauthorized Access to Data 9 November 2009 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: mod_perl2 Publisher: Sun Microsystems Operating System: Solaris OpenSolaris Impact/Access: Cross-site Scripting -- Remote/Unauthenticated Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2009-0796 CVE-2007-1349 Reference: ESB-2009.0353 ESB-2007.0417 Original Bulletin: http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-272230-1 Comment: The patch for Solaris 10 is yet to be released. - --------------------------BEGIN INCLUDED TEXT-------------------- Security Vulnerabilities in the Apache 2 "mod_perl2" Module Components "PerlRun.pm" and "Status.pm" May Lead to Denial of Service (DoS) or Unauthorized Access to Data _________________________________________________________________ Category : Security Release Phase : Preliminary Bug Id : 6835110, 6867394 Product : Solaris 10 Operating System OpenSolaris Two security vulnerabilities exist in the Apache 2 ... 1. Impact Two security vulnerabilities exist in the Apache 2 mod_perl2(3) module components which affect the Apache 2.0 web server bundled with Solaris 10 and the Apache 2.2 web server bundled with OpenSolaris. The first issue, a Denial of Service (DoS) vulnerability in the "RunPerl.pm" component (CVE-2007-1349), may allow a remote unprivileged user to cause a Denial of Service to the Apache 2 "httpd" process. The second issue, a Cross Site Scripting (CSS or XSS) vulnerability in the "Status.pm" component (CVE-2009-0796), may allow a remote unprivileged user to inject arbitrary web script or HTML. This may allow the unprivileged user to bypass access control and gain access to unauthorized data. Additional information regarding these issues is available at: CVE-2007-1349 at: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1349 CVE-2009-0796 at: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0796 2. Contributing Factors These issues can occur in the following releases: SPARC Platform * Solaris 10 * OpenSolaris based upon builds snv_01 through snv_123 x86 Platform * Solaris 10 * OpenSolaris based upon builds snv_01 through snv_123 Note 1: OpenSolaris distributions may include additional bug fixes above and beyond the build from which it was derived. To determine the base build of OpenSolaris, the following command can be used: $ uname -v snv_111 Note 2: Solaris 8 and Solaris 9 do not include support for Apache 2 web server and so they are not impacted by these issues. Note 3: A system is only vulnerable to the described issues if the Apache 2 web server has been configured and is running on the system. The following SMF command can be used to see if the Solaris 10 bundled Apache 2.0 web server service is enabled: $ svcs svc:/network/http:apache2 STATE STIME FMRI disabled Feb_02 svc:/network/http:apache2 The following SMF command can be used to see if the OpenSolaris bundled Apache 2.2 web server service is enabled: $ svcs svc:/network/http:apache22 STATE STIME FMRI disabled Feb_02 svc:/network/http:apache22 Note 4: First vulnerability (CVE-2007-1349) only affects systems which make use of the Apache 2 Server mod_perl2(3) (PerlRun.pm) component. To determine if the "PerlRun.pm" component is used, the following command can be run for all configuration files that define the running Apache 2 configurations: For Solaris 10: $ grep PerlResponseHandler /etc/apache2/httpd.conf | grep ModPerl::PerlRun PerlResponseHandler ModPerl::PerlRun For OpenSolaris: $ grep PerlResponseHandler /etc/apache2/2.2/httpd.conf | grep ModPerl::Perl Run PerlResponseHandler ModPerl::PerlRun Note 5: Second vulnerability (CVE-2009-0796) only affects systems which make use of the Apache 2 Server mod_perl2(3) (Status.pm) component. To determine if the "Status.pm" component is used, the following command can be run for all configuration files that define the running Apache 2 configurations: For Solaris 10: $ grep Apache2::Status /etc/apache2/httpd.conf PerlResponseHandler Apache2::Status For OpenSolaris: $ grep Apache2::Status /etc/apache2/2.2/httpd.conf PerlResponseHandler Apache2::Status 3. Symptoms If the first issue (CVE-2007-1349) is exploited, the Apache 2 web server may be unresponsive, possibly consuming all available CPU resources. Commands such as prstat(1M) can be used to determine the utilization of system resources: $ prstat -s cpu [...] There are no predictable symptoms that would indicate that the second issue (CVE-2009-0796) has been exploited. 4. Workaround To work around the described issues, do not configure the mod_perl2(3) components PerlRun.pm and Status.pm in the Apache 2 "httpd.conf" file. This may be done by commenting the corresponding sections in the file ("ModPerl::PerlRun" and "Apache2::Status"). 5. Resolution This issues are resolved in the following releases: SPARC Platform * OpenSolaris based upon builds snv_124 or later x86 Platform * OpenSolaris based upon builds snv_124 or later A final resolution is pending completion for Solaris 10. For more information on Security Sun Alerts, see Technical Instruction ID 213557: http://sunsolve.sun.com/search/document.do?assetkey=1-61-213557-1 This Sun Alert notification is being provided to you on an "AS IS" basis. This Sun Alert notification may contain information provided by third parties. The issues described in this Sun Alert notification may or may not impact your system(s). Sun makes no representations, warranties, or guarantees as to the information contained herein. ANY AND ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE HEREBY DISCLAIMED. BY ACCESSING THIS DOCUMENT YOU ACKNOWLEDGE THAT SUN SHALL IN NO EVENT BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES THAT ARISE OUT OF YOUR USE OR FAILURE TO USE THE INFORMATION CONTAINED HEREIN. This Sun Alert notification contains Sun proprietary and confidential information. 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Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 If you believe that your computer system has been compromised or attacked in any way, we encourage you to let us know by completing the secure National IT Incident Reporting Form at: http://www.auscert.org.au/render.html?it=3192 =========================================================================== 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. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iD8DBQFK939dNVH5XJJInbgRAknQAJ9PiFcdVD3SDAZYwDtSkIVUXCDstwCfdhSZ brvDeG/IUv0zY4bp18sRksg= =ZUOA -----END PGP SIGNATURE-----