Bug 1610552 (CVE-2018-15470)

Summary: CVE-2018-15470 xen: oxenstored does not apply quota-maxentity (XSA-272)
Product: [Other] Security Response Reporter: Laura Pardo <lpardo>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: ailan, drjones, imammedo, jforbes, knoel, m.a.young, mrezanin, pbonzini, rkrcmar, robinlee.sysu, security-response-team, vkuznets, xen-maint
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Last Closed: 2018-10-09 12:05:01 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On: 1616080    
Bug Blocks: 1610553    

Description Laura Pardo 2018-07-31 21:59:42 UTC 
A flaw was found in xen. The logic in oxenstored for handling writes depended on the order of evaluation of expressions making up a tuple. The order of evaluation of subexpressions is not specified. This allows a malicious or buggy guest to write as many xenstore entriesas it wishes, causing unbounded memory usage in oxenstored. This can lead to a system-wide DoS.
Comment 1 Laura Pardo 2018-08-14 21:52:09 UTC 
Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1616080]