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Bug 1632443 - (CVE-2018-16597) CVE-2018-16597 kernel: overlayfs file truncation without permissions
CVE-2018-16597 kernel: overlayfs file truncation without permissions
Status: CLOSED ERRATA
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=20180918,repor...
: Security
Depends On: 1638097 1361590 1632444 1632445 1641718
Blocks: 1632446
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Reported: 2018-09-24 16:05 EDT by Pedro Sampaio
Modified: 2018-10-24 14:11 EDT (History)
49 users (show)

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Doc Text:
An issue was discovered in the Linux kernel where an incorrect access check in overlayfs mounts could be used by local attackers to modify or truncate files in the underlying filesystem.
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Last Closed: 2018-10-10 12:46:39 EDT
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
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Description Pedro Sampaio 2018-09-24 16:05:55 EDT 
An issue was discovered in the Linux kernel where an incorrect access checking in overlayfs mounts could be used by local attackers to modify or truncate files in the underlying filesystem.

References:

https://bugzilla.suse.com/show_bug.cgi?id=1106512

An upstream patch:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c0ca3d70e8d3cf81e2255a217f7ca402f5ed0862
Comment 1 Pedro Sampaio 2018-09-24 16:07:31 EDT 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1632445]
Comment 8 Vladis Dronov 2018-10-22 11:12:57 EDT 
this was fixed in RHEL-7.3 by bz1361590 and by the errata:

https://access.redhat.com/errata/RHSA-2016:2574
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