Bug 1000194 (CVE-2013-4262, CVE-2013-7393)

Summary: CVE-2013-4262 CVE-2013-7393 subversion: svnwcsub.py and irkerbridge.py are vulnerable to symlink attack
Product: [Other] Security Response Reporter: Vincent Danen <vdanen>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: security-response-team
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: subversion 1.8.3 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2013-08-22 22:19:39 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:    
Bug Blocks: 1000203    
Attachments:
Description Flags
upstream patch to fix CVE-2013-4262 none

Description Vincent Danen 2013-08-22 22:17:40 UTC 
Two flaws were reported in optional admin-side utilities that are provided with Subversion 1.8.x:

svnwcsub.py and irkerbridge.py take a --pidfile option which creates a file containing the process id they are running as.  Both of them do not take steps to ensure that the file they have been directed at is not a symlink.  If the pid file is in a directory writeable by unprivileged users, the destination could be replaced by a symlink allowing for privilege escalation.  Both are optional extra tools that are not installed by default and do not create a pid file by default.

These tools are not provided in earlier versions of Subversion.


Acknowledgements:

Red Hat would like to thank Ben Reser of the Apache Subversion project for reporting this issue. Upstream acknowledges Daniel Shahaf of Apache Infrastructure as the original issue reporter.


Statement:

Not vulnerable.  This issue did not affect the versions of subversion as shipped with Red Hat Enterprise Linux 5 or 6, as they did not ship the vulnerable versions of subversion.
Comment 1 Vincent Danen 2013-08-22 22:18:16 UTC 
This issue is embargoed until 29 August 2013 17:00 UTC.
Comment 2 Vincent Danen 2013-08-22 22:19:10 UTC 
Created attachment 789385 [details]
upstream patch to fix CVE-2013-4262
Comment 3 Vincent Danen 2013-08-30 16:41:06 UTC 
External References:

http://subversion.apache.org/security/CVE-2013-4262-advisory.txt
Comment 4 Vincent Danen 2014-07-28 19:12:38 UTC 
Common Vulnerabilities and Exposures assigned an identifier CVE-2013-4262 to
the following vulnerability:

Name: CVE-2013-4262
URL: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4262
Assigned: 20130612
Reference: https://subversion.apache.org/security/CVE-2013-4262-advisory.txt

svnwcsub.py in Subversion 1.8.0 before 1.8.3, when using the --pidfile
option and running in foreground mode, allows local users to gain
privileges via a symlink attack on the pid file.  NOTE: this issue was
SPLIT due to different affected versions (ADT3). The irkerbridge.py
issue is covered by CVE-2013-7393.


Common Vulnerabilities and Exposures assigned an identifier CVE-2013-7393 to
the following vulnerability:

Name: CVE-2013-7393
URL: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-7393
Assigned: 20140728
Reference: https://subversion.apache.org/security/CVE-2013-4262-advisory.txt

The daemonize.py module in Subversion 1.8.0 before 1.8.2 allows local
users to gain privileges via a symlink attack on the pid file created
for (1) svnwcsub.py or (2) irkerbridge.py when the --pidfile option is
used.  NOTE: this issue was SPLIT from CVE-2013-4262 based on different
affected versions (ADT3).