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Bugzilla – Full Text Bug Listing |
| Summary: | VUL-0: CVE-2005-1527: awstats showinfourl rce | ||
|---|---|---|---|
| Product: | [Novell Products] SUSE Security Incidents | Reporter: | Sebastian Krahmer <krahmer> |
| Component: | Incidents | Assignee: | Sebastian Krahmer <krahmer> |
| Status: | RESOLVED FIXED | QA Contact: | Security Team bot <security-team> |
| Severity: | Normal | ||
| Priority: | P5 - None | CC: | security-team |
| Version: | unspecified | ||
| Target Milestone: | --- | ||
| Hardware: | Other | ||
| OS: | All | ||
| Whiteboard: | CVE-2005-1527: CVSS v2 Base Score: 5.0 (AV:N/AC:L/Au:N/C:N/I:P/A:N) | ||
| Found By: | Other | Services Priority: | |
| Business Priority: | Blocker: | --- | |
| Marketing QA Status: | --- | IT Deployment: | --- |
| Attachments: | patchinfo | ||
=> AWStats 6.4 has replaced all eval() statements, and has mitigated the
exposure to this vulnerability.
I made a version update to 6.4 on stable before preview4 - but they say
"mitigated" not "solved".
Is it ok to stay with 6.4 or should I create a patch
my $function="ShowInfoURL_$pluginname('$url')";
eval("$function");
To filter $url before using it as an paramaeter for ShowInfoURL_$pluginname
"This vulnerability has been addressed with the release of AWStats 6.4." So, it should be ok to stay at 6.4 no? From: iDFEENSE Labs <labs-no-reply@idefense.com Subject: [Full-disclosure] Re: iDEFENSE Security Advisory 08.09.05: AWStats Errors-To: full-disclosure-bounces@lists.grok.org.uk Martin, Apologies for the confusion, and thank you for bringing this to our attention. The version information was slightly off in our original advisory. The vulnerability does affect AWStats 6.4 and prior, and the flaw has been addressed in AWStats 6.5. The patch was introduced inadvertantly when all eval() calls were replaced with sane function calls in the cvs commit shown here: http://cvs.sourceforge.net/viewcvs.py/awstats/awstats/wwwroot/cgi-bin/awstat s.pl?r1=1.819&r2=1.820&diff_format=u The patched function in AWStats 6.5 is at lines 4925 - 4936 of the awstats.pl script: sub ShowURLInfo { my $url=shift; my $nompage=CleanFromCSSA($url); # Call to plugins' function ShowInfoURL foreach my $pluginname (keys %{$PluginsLoaded{'ShowInfoURL'}}) { # my $function="ShowInfoURL_$pluginname('$url')"; # eval("$function"); my $function="ShowInfoURL_$pluginname"; &$function($url); } The public advisory on our website has been updated and can be accessed at the following url: http://www.idefense.com/application/poi/display?id=290&type=vulnerabilities& flashstatus=true iDEFENSE Labs SM-2037 patchinfo submitted. Go ahead. Created attachment 46024 [details]
patchinfo
...
Package approved. Will be annoucned with the next advisory. my work is done I know :-) CVE-2005-1527: CVSS v2 Base Score: 5.0 (AV:N/AC:L/Au:N/C:N/I:P/A:N) |
AWStats ShowInfoURL Remote Command Execution Vulnerability iDEFENSE Security Advisory 08.09.05 www.idefense.com/application/poi/display?id=290&type=vulnerabilities August 09, 2005 I. BACKGROUND AWStats is a free tool that generates web, streaming, ftp or mail server statistics, graphically. It can analyze log files from all major server tools like Apache log files (NCSA combined/XLF/ELF log format or common/CLF log format), WebStar, IIS (W3C log format) and other web, proxy, wap, streaming servers, mail servers and some ftp servers. More information is available at the vendor's website: http://awstats.sourceforge.net II. DESCRIPTION Remote exploitation of an input validation vulnerability in AWStats allows remote attackers to execute arbitrary commands. AWStats is a logfile analysis tool that generates reports for ftp, mail and web traffic. The problem specifically exists because of insufficient input filtering before passing user-supplied data to an eval() function. As part of the statistics reporting function, AWStats displays information about the most common referrer values that caused users to visit the website. The referrer data is used without proper sanitation in an eval() statement, resulting in the execution of arbitrary perl code. Shown as follows, the $url parameter contains unfiltered user-supplied data that is used in a call to the Perl routine eval() on lines 4841 and 4842 of awstats.pl (version 6.4): my $function="ShowInfoURL_$pluginname('$url')"; eval("$function"); The malicious referrer value will be included in the referrer statistics portion of the AWStats report after AWStats has been run to generate a new report including the tainted data. Once a user visits the referrer statistics page, the injected perl code will execute with permissions of the web service. III. ANALYSIS Successful exploitation results in the execution of arbitrary commands with permissions of the web service. Exploitation will not occur until the stats page has been regenerated with the tainted referrer values from the http access log. Note that AWStats is only vulnerable in situations where at least one URLPlugin is enabled. AWStats is a very commonly used web statistics reporting package. Since this attack does not require special privileges, it is recommended that users update AWStats to the latest available package. IV. DETECTION iDEFENSE Labs has confirmed the existence of this vulnerability in AWStats 6.3. All earlier versions are suspected vulnerable. AWStats 6.4 has been released since the initial research on this vulnerability. AWStats 6.4 has replaced all eval() statements, and has mitigated the exposure to this vulnerability. V. WORKAROUND As a workaround solution, disable all URLPlugins in the AWStats configuration. VI. VENDOR RESPONSE This vulnerability has been addressed with the release of AWStats 6.4. Updated software packages are available from: AWStats 6.4: http://awstats.sourceforge.net/#DOWNLOAD VII. CVE INFORMATION The Common Vulnerabilities and Exposures (CVE) project has assigned the name CAN-2005-1527 to this issue. This is a candidate for inclusion in the CVE list (http://cve.mitre.org), which standardizes names for security problems. It should be noted that this is similar to but different from CAN-2005-0436. VIII. DISCLOSURE TIMELINE 05/12/2005 Initial vendor notification 08/09/2005 Public disclosure IX. CREDIT Peter Vreugdenhil (security[at]petervreugdenhil[dot]nl) is credited with this discovery. Get paid for vulnerability research http://www.idefense.com/poi/teams/vcp.jsp Free tools, research and upcoming events http://labs.idefense.com X. LEGAL NOTICES Copyright (c) 2005 iDEFENSE, Inc. Permission is granted for the redistribution of this alert electronically. It may not be edited in any way without the express written consent of iDEFENSE. If you wish to reprint the whole or any part of this alert in any other medium other than electronically, please email customerservice@idefense.com for permission. Disclaimer: The information in the advisory is believed to be accurate at the time of publishing based on currently available information. Use of the information constitutes acceptance for use in an AS IS condition. There are no warranties with regard to this information. Neither the author nor the publisher accepts any liability for any direct, indirect, or consequential loss or damage arising from use of, or reliance on, this information.