Bug 901574

Summary: Spring Framework: Remote code execution with Expression Language injection
Product: [Other] Security Response Reporter: Jan Lieskovsky <jlieskov>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: brms-jira, epp-bugs, jbpapp-maint, jrusnack, pcheung, soa-p-jira, theute, tkirby
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2013-01-18 16:16:44 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:    
Bug Blocks: 901575    

Description Jan Lieskovsky 2013-01-18 14:47:24 UTC
It was found that in certain circumstances, Spring framework evaluated Expression Language (EL) expressions twice: once by the container, and once by the tag. A remote attacker could use this flaw to execute arbitrary code in the context of the application server, or to obtain sensitive information from the server, via a specially-crafted HTTP request. 

[1] http://www.networkworld.com/news/2013/011713-java-spring-framework-265923.html
[2] http://www.infosecurity-magazine.com/view/30282/remote-code-vulnerability-in-spring-framework-for-java/

Comment 1 Jan Lieskovsky 2013-01-18 16:16:44 UTC
SpringSource security team has confirmed that this is NOT a new security flaw (other than original CVE-2011-2730 issue), but rather just a new exploit was published for the original CVE-2011-2730 issue demonstrating remote code execution was possible for the original flaw:
[3] http://support.springsource.com/security/cve-2011-2730

From the "History" section of [3]:
'2012-12-06: Updated advisory with finding by Dan Amodio that issue may lead to remote code execution'

Also, the following independent article:
[4] http://www.h-online.com/security/news/item/The-ghost-of-a-Spring-Framework-bug-haunts-old-code-1786850.html

clarifies the confusion (that might appear) due the newly published advisories [1], [2].

*** This bug has been marked as a duplicate of bug 737608 ***