Bug 737613 (CVE-2011-2731)

Summary:	CVE-2011-2731 Spring Security: Privilege escalation by using RunAsManager mechanism
Product:	[Other] Security Response	Reporter:	Jan Lieskovsky <jlieskov>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	brms-jira, djorm, tkirby
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2011-09-15 08:44:08 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:	737623

Description Jan Lieskovsky 2011-09-12 17:51:43 UTC

A privilege escalation flaw was found in the way the RunAsManager mechanism of the Spring Security tool performed user account (privileges) switch. Due to a race condition, a remote attacker could use this flaw to escalate their privileges (elevated privileges would be shared between concurrently executing threads).

References:
[1] http://www.securityfocus.com/archive/1/519594/30/0/threaded
[2] http://www.springsource.com/security/cve-2011-2731

Comment 1 Jan Lieskovsky 2011-09-12 17:52:47 UTC

Sample PoC (from [1]):
======================
<quote>
Example:
If the RunAsManager returns an Authentication object for the current invocation, the security interceptor will temporarily store this in the security context for the duration of the invocation. This authentication object would be shared with other concurrently executing threads, leading to a possible escalation of privileges in those threads.
</quote>

Comment 2 David Jorm 2011-09-15 08:44:08 UTC

Statement:

Not vulnerable. This issue affects the Spring Security package, which is not shipped with any Red Hat products.