Bug 1593803 – CVE-2018-10870 redhat-certification: rhcertStore.py:__saveResultsFile allows to write any file

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Bug 1593803 - (CVE-2018-10870) CVE-2018-10870 redhat-certification: rhcertStore.py:__saveResultsFile allows to write any file

Summary:	CVE-2018-10870 redhat-certification: rhcertStore.py:__saveResultsFile allows ...

Status:	CLOSED ERRATA

Aliases:	CVE-2018-10870

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	urgent Severity urgent
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=critical,public=20180718,repor...
Keywords:	Security

Depends On:	1608782
Blocks:	1593614
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Reported:	2018-06-21 11:30 EDT by Riccardo Schirone
Modified:	2018-08-10 02:12 EDT (History)
CC List:	5 users (show)

See Also:
Fixed In Version:	redhat-certification 5.15-20180717
Doc Type:	If docs needed, set a value
Doc Text:	It has been discovered that redhat-certification does not properly sanitize paths in rhcertStore.py:__saveResultsFile. A remote attacker could use this flaw to overwrite any file, potentially gaining remote code execution.
Story Points:	---
Clone Of:
Environment:
Last Closed:	2018-08-10 02:12:04 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2018:2373	None	None	None	2018-08-09 13:22 EDT

Groups: None (edit)

Description Riccardo Schirone 2018-06-21 11:30:19 EDT

It has been discovered that redhat-certification does not properly sanitize paths in rhcertStore.py:__saveResultsFile. A remote attacker could use this flaw to overwrite any file, potentially gaining remote code execution.

Comment 1 Riccardo Schirone 2018-06-21 11:30:22 EDT

Acknowledgments:

Name: Riccardo Schirone (Red Hat Product Security)

Comment 2 Riccardo Schirone 2018-06-21 11:30:25 EDT

Mitigation:

If SELinux is enabled it further restricts the set of files an attacker may write to. This prevents some basic attacks that would allow to gain remote code execution, though it is not excluded other means are possible.

Comment 5 Riccardo Schirone 2018-06-25 09:06:42 EDT

resultsFileName in rhcertStore.py:__saveResultsFile creates the path on the server by concatenating some fixed strings with others that can be manipulated by an attacker. In particular, when uploading a "transfer" file in /save, the clientIP is used to construct the final path, however clientIP is under the attacker's control because taken from the X-Forwarded-For HTTP header.

Comment 8 errata-xmlrpc 2018-08-09 13:22:53 EDT

This issue has been addressed in the following products:

  Red Hat Certification for Red Hat Enterprise Linux 7

Via RHSA-2018:2373 https://access.redhat.com/errata/RHSA-2018:2373

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