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Bug 1605065 - (CVE-2018-10908) CVE-2018-10908 vdsm: calls to qemu-img are not protected by prlimit/ulimit
CVE-2018-10908 vdsm: calls to qemu-img are not protected by prlimit/ulimit
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20180808,repor...
: Security
Depends On: 1605069 1605070
Blocks: 1605064
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Reported: 2018-07-20 02:10 EDT by Doran Moppert
Modified: 2018-08-30 01:19 EDT (History)
28 users (show)

See Also:
Fixed In Version: vdsm 4.20.37
Doc Type: If docs needed, set a value
Doc Text:
It was found that vdsm would invoke qemu-img on untrusted inputs without limiting resources. By uploading a specially crafted image, an attacker could cause the qemu-img process to consume unbounded amounts of memory of CPU time, causing a denial of service condition that could potentially impact other users of the host.
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RHEL 7.3 requirements from Atomic Host:
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Description Doran Moppert 2018-07-20 02:10:47 EDT 
A vulnerability was found in ovirt, allowing a user to consume large amounts of memory or CPU time on the host by uploading a maliciously crafted image. This could lead to denial of service on the host, potentially impacting other users.
Comment 2 Doran Moppert 2018-07-20 02:14:17 EDT 
See also CVE-2015-5162, essentially the same issue on Openstack.
Comment 4 Doran Moppert 2018-07-20 02:31:51 EDT 
Discussion:

http://lists.nongnu.org/archive/html/qemu-block/2018-07/msg00488.html
Comment 5 Doran Moppert 2018-07-24 00:40:29 EDT 
Statement:

Red Hat Enterprise Virtualization 3 is now in Extended Life Phase of the support and maintenance lifecycle. Red Hat Product Security has rated this issue as having a security impact of Moderate, and it is not currently planned to be addressed in future updates of Red Hat Virtualization 3. For additional information, refer to the Red Hat Virtualization Life Cycle: https://access.redhat.com/support/policy/updates/rhev/
Comment 6 Doran Moppert 2018-08-08 21:22:05 EDT 
External References:

https://gerrit.ovirt.org/#/c/93195/
Comment 7 Doran Moppert 2018-08-08 21:25:42 EDT 
Acknowledgments:

Name: Nir Soffer (Red Hat)
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