Bug 688727 (CVE-2011-0456)

Summary:	CVE-2011-0456 otrs: arbitrary command execution flaw
Product:	[Other] Security Response	Reporter:	Vincent Danen <vdanen>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	vanmeeuwen+fedora
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2014-01-29 17:50:48 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	635847
Bug Blocks:

Description Vincent Danen 2011-03-17 20:27:55 UTC

Common Vulnerabilities and Exposures assigned an identifier CVE-2011-0456 to
the following vulnerability:

Name: CVE-2011-0456
URL: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-0456
Assigned: 20110114
Reference: http://jvn.jp/en/jp/JVN73162541/index.html
Reference: http://jvndb.jvn.jp/jvndb/JVNDB-2011-000019

Open Ticket Request System (OTRS) 2.3.4 and earlier allows remote
attackers to execute arbitrary commands via unspecified vectors,
related to a "command injection vulnerability."


I asked upstream about this and the only information they provided is that OTRS versions greater than 2.3.4 are not affected (have the fix).  Request for clarification on whether this only affected 2.3.4, or how far back it went, or what was the fix, were ignored.

EPEL-5 contains OTRS 2.1.7, so it is unclear as to whether a version that old is affected.

Comment 1 Vincent Danen 2011-03-18 17:33:05 UTC

Kurt Seifried pointed out the following commit, that is also relevant to 2.1.7:


diff -ru otrs-2.3.4/scripts/webform.pl otrs-2.3.5/scripts/webform.pl
--- otrs-2.3.4/scripts/webform.pl       2008-04-24 11:32:15.000000000 -0600
+++ otrs-2.3.5/scripts/webform.pl       2009-02-20 04:49:40.000000000 -0700

@@ -241,13 +261,15 @@
     push @Mail, "\n";

     # send mail
-    $Param{From} =~ s/"|;|'|<|>|\|| //ig;
-    if ( open( MAIL, "|$Sendmail $Param{From} " ) ) {
-        print MAIL @Mail;
-        close(MAIL);
+    my $FromEmail = $Param{FromEmail};
+    $FromEmail =~ s/"|;|'|<|>|\||\s|\r|\n|\t|`//ig;
+    $FromEmail = quotemeta $FromEmail;
+    if ( open( my $Mail, '|-', "$Sendmail $FromEmail" ) ) {
+        print $Mail @Mail;
+        close $Mail;

I suspect this is the problem right here.

Comment 2 Vincent Danen 2014-01-29 17:50:48 UTC

OTRS has been removed from EPEL5, so this flaw no longer affects anything currently shipped.