Bug 753970 (CVE-2011-4116)

Summary: CVE-2011-4116 perl: File::Temp insecure temporary file handling
Product: [Other] Security Response Reporter: Vincent Danen <vdanen>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED WONTFIX QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: bressers, carnil, cweyl, iarnell, jrusnack, kasal, lkundrak, mmaslano, perl-maint-list, ppisar, psabata, rc040203, tcallawa
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
URL: https://rt.perl.org/rt3/Public/Bug/Display.html?id=110730
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2015-08-22 06:54:18 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On: 754107    
Bug Blocks: 753972    

Description Vincent Danen 2011-11-15 00:48:14 UTC
A flaw was reported [1] in how perl's File::Temp module created temporary files and directories.  File::Temp would create a file or directory without checking first whether or not the directory it was creating the file in, or a parent directory, was owned by root or the calling user in the case of symlinks or hardlinks.  A malicious local attacker could use this to direct where temporary files were being created.

The upstream report has some discussion around how to fix the flaw, but does not have a patch.

[1] https://rt.cpan.org/Public/Bug/Display.html?id=69106

Comment 1 Tomas Hoger 2011-11-15 07:46:04 UTC
Solar Designer's comments on this issue:
http://thread.gmane.org/gmane.comp.security.oss.general/6174/focus=6177

Comment 2 Ramon de C Valle 2011-11-15 12:28:12 UTC
Solar has made concise comments about File::Temp safety levels, and whether this is a security issue. Regardless of the approach chosen from https://rt.cpan.org/Public/Bug/Display.html?id=69106#txn-999472 (I'd choose the 2), we are deferring this.

Comment 4 Ramon de C Valle 2011-11-15 12:34:17 UTC
Created perl tracking bugs for this issue

Affects: fedora-all [bug 754107]

Comment 5 Petr Pisar 2012-02-14 17:01:18 UTC
This issue has emerged on <https://rt.perl.org/rt3/Public/Bug/Display.html?id=110730>.

Comment 8 Vincent Danen 2015-08-22 06:54:04 UTC
Statement:

Red Hat Product Security has rated this issue as having Low security impact. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.