Bug 758866 - (CVE-2011-4363) CVE-2011-4363 perl-Proc-ProcessTable: unsafe temporary file usage
CVE-2011-4363 perl-Proc-ProcessTable: unsafe temporary file usage
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
All Linux
low Severity low
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Assigned To: Red Hat Product Security
: Security
Depends On: 758868 758869
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Reported: 2011-11-30 15:52 EST by Vincent Danen
Modified: 2014-11-20 15:06 EST (History)
4 users (show)

See Also:
Fixed In Version: perl-Proc-ProcessTable 0.48
Doc Type: Bug Fix
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Last Closed: 2013-08-08 17:21:11 EDT
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RHEL 7.3 requirements from Atomic Host:
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External Trackers
Tracker ID Priority Status Summary Last Updated
Debian BTS 650500 None None None 2012-10-08 05:01:03 EDT

  None (edit)
Description Vincent Danen 2011-11-30 15:52:03 EST
It was reported [1] that the perl Proc::ProcessTable module would cache TTY information insecurely, using the predictable file name /tmp/TTYDEVS, which could allow an attacker to overwrite arbitrary files due to a race condition.  Caching is not enabled by default.

The relevant codepath can be reached using:

$ perl -MProc::ProcessTable -e 'my $t = Proc::ProcessTable->new(cache_ttys => 1, enable_ttys => 1); $t->table;'

The flaw is in ProcessTable.pm:

102       if( -r $TTYDEVSFILE )
103       {
104         $_ = Storable::retrieve($TTYDEVSFILE);
107       else
108       {
112         Storable::store(\%Proc::ProcessTable::TTYDEVS, $TTYDEVSFILE);

[1] http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=650500
Comment 1 Vincent Danen 2011-11-30 15:53:50 EST
0.45 is the latest upstream version and was released in 2008; I don't think upstream will be providing a fix for this judging by the number of open bug reports.

A CVE was also requested:

Comment 2 Vincent Danen 2011-11-30 15:54:29 EST
Created perl-Proc-ProcessTable tracking bugs for this issue

Affects: epel-all [bug 758868]
Affects: fedora-all [bug 758869]
Comment 3 Vincent Danen 2011-11-30 16:04:28 EST
This was assigned the name CVE-2011-4363:

Comment 5 Vincent Danen 2013-07-24 13:11:23 EDT
This looks to be the fix:


And is corrected in upstream version 0.48
Comment 6 Fedora Update System 2013-08-02 17:52:09 EDT
perl-Proc-ProcessTable-0.48-1.fc19 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 7 Fedora Update System 2013-08-02 18:02:17 EDT
perl-Proc-ProcessTable-0.48-1.fc18 has been pushed to the Fedora 18 stable repository.  If problems still persist, please make note of it in this bug report.

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