Bug 1730300 (CVE-2019-13226) - CVE-2019-13226 deepin-clone: predictable path in the Helper::temporaryMountDevice() function enabling a symlink exploit
Summary: CVE-2019-13226 deepin-clone: predictable path in the Helper::temporaryMountDe...
Alias: CVE-2019-13226
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 1730301
TreeView+ depends on / blocked
Reported: 2019-07-16 12:18 UTC by Marian Rehak
Modified: 2021-02-16 21:43 UTC (History)
3 users (show)

Fixed In Version:
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Last Closed: 2019-07-16 14:40:47 UTC

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Description Marian Rehak 2019-07-16 12:18:11 UTC
deepin-clone before 1.1.3 uses a predictable path /tmp/.deepin-clone/mount/<block-dev-basename> in the Helper::temporaryMountDevice() function to temporarily mount a file system as root. An unprivileged user can prepare a symlink at this location to have the file system mounted in an arbitrary location. By winning a race condition, the attacker can also enter the mount point, thereby preventing a subsequent unmount of the file system.

External Reference:


Comment 1 Marian Rehak 2019-07-16 12:18:24 UTC
Created deepin-clone tracking bugs for this issue:

Affects: fedora-30 [bug 1730301]

Comment 2 Product Security DevOps Team 2019-07-16 14:40:47 UTC
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.

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