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Bug 1427090 - (CVE-2017-2635) CVE-2017-2635 libvirt: Null pointer dereference when updating storage size on empty drives
CVE-2017-2635 libvirt: Null pointer dereference when updating storage size on...
Status: CLOSED NOTABUG
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=20170209,repor...
: Security
Depends On: 1420718
Blocks: 1427095
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Reported: 2017-02-27 05:56 EST by Adam Mariš
Modified: 2018-08-24 13:40 EDT (History)
37 users (show)

See Also:
Fixed In Version: libvirt 3.1.0
Doc Type: If docs needed, set a value
Doc Text:
A NULL pointer deference flaw was found in the way libvirt handled empty drives. A remote authenticated attacker could use this flaw to crash libvirtd daemon resulting in denial of service.
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Clone Of:
Environment:
Last Closed: 2017-03-29 06:37:41 EDT
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CRM:
Verified Versions:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Adam Mariš 2017-02-27 05:56:13 EST 
A NULL pointer dereference vulnerability was found in virStorageSourceUpdateBlockPhysicalSize when attempted to call on empty drives. Unprivileged local user can trigger this bug to crash libvirtd.

Upstream patch:

https://libvirt.org/git/?p=libvirt.git;a=commit;h=c3de387380f6057ee0e46cd9f2f0a092e8070875

Introduced by:

https://libvirt.org/git/?p=libvirt.git;a=commit;h=c5f6151390
Comment 3 Dhiru Kholia 2017-03-09 03:00:22 EST 
Acknowledgments:

Name: Yanqiu Zhang (Red Hat)
Comment 4 Carl Song 2017-04-07 16:48:07 EDT 
Could you provide the rationale behind the verdict of "NOTABUG", given there's a CVE assigned and an upstream patch exists?
Comment 6 Dhiru Kholia 2017-04-10 01:29:39 EDT 
Statement:

This issue does not affect libvirt as shipped with Red Hat Enterprise Linux 5, 6 and 7 as it does not contain the affected code.
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