Bug 1253692 – CVE-2006-4842 nspr: setuid root programs linked with NSPR allow elevation of privilege

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Bug 1253692 - (CVE-2006-4842) CVE-2006-4842 nspr: setuid root programs linked with NSPR allow elevation of privilege

Summary:	CVE-2006-4842 nspr: setuid root programs linked with NSPR allow elevation of ...

Status:	CLOSED NOTABUG

Aliases:	CVE-2006-4842

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

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

URL:
Whiteboard:	impact=important,public=20060905,repo...
Keywords:	Security

Depends On:
Blocks:
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Reported:	2015-08-14 09:13 EDT by Adam Mariš
Modified:	2015-08-14 10:30 EDT (History)
CC List:	2 users (show)

See Also:
Fixed In Version:	nspr 4.7
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2015-08-14 10:30:33 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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Description Adam Mariš 2015-08-14 09:13:32 EDT

NSPR logging is controlled with a couple of environment variables, 
one to enable it, and a second to control the name of the log file.
This appears to all work in "optimized" (non-debug) builds.  

So, if any setuid root program is linked with NSPR, any user can clobber
any file on the system (any root writable file) by setting NSPR's 
environment variables to log to that file, and then running a setuid root
program linked with NSPR.

External reference:
https://bugzilla.mozilla.org/show_bug.cgi?id=351470

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