Xen ARM Multicall Processing Bug Lets Local Users on a Guest System Cause Denial of Service Conditions on the Host System
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SecurityTracker Alert ID: 1034031 |
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SecurityTracker URL: http://securitytracker.com/id/1034031
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CVE Reference:
CVE-2015-7812
(Links to External Site)
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Date: Oct 30 2015
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Impact:
Denial of service via network
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Fix Available: Yes Vendor Confirmed: Yes
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Version(s): 4.4.x, 4.5.x, 4.6.x
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Description:
A vulnerability was reported in Xen. A local user on the guest system can cause denial of service conditions on the host system.
A local user on the guest system can issue a preemptable hypercall via the multicall interface to trigger a flaw in the handling of multicalls and cause the target host system to crash.
32-bit and 64-bit ARM systems are affected.
x86 systems are not affected.
Julien Grall of Citrix reported this vulnerability.
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Impact:
A local user on the guest system can cause denial of service conditions on the host system.
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Solution:
The vendor has issued a fix (xsa145.patch).
The vendor's advisory is available at:
http://xenbits.xen.org/xsa/advisory-145.html
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Vendor URL: xenbits.xen.org/xsa/advisory-145.html (Links to External Site)
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Cause:
Access control error
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Underlying OS: Linux (Any)
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Message History:
None.
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Source Message Contents
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[Original Message Not Available for Viewing]
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