Bug 1597495 - accountsservice: Improper path validation of user icon files allows for spoofing via symlink
Summary: accountsservice: Improper path validation of user icon files allows for spoof...
Keywords:
Status: CLOSED DUPLICATE of bug 1601019
Alias: None
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1597497 1597499
Blocks: 1597500
TreeView+ depends on / blocked
 
Reported: 2018-07-03 05:41 UTC by Sam Fowler
Modified: 2021-02-17 00:01 UTC (History)
3 users (show)

Fixed In Version:
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Last Closed: 2018-07-13 19:17:39 UTC
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Description Sam Fowler 2018-07-03 05:41:43 UTC 
GNOME AccountsService does not properly validate the filepaths of user icon files in the user.c:user_change_icon_file_authorized_cb() function. An attacker could exploit this by providing a crafted path via  D-Bus message and replacing it with a symlink. Third party applications that trust this path can potentially read from its location as root and try to interpret it as an image file.


External Reference:

http://www.openwall.com/lists/oss-security/2018/07/02/2


Upstream Bug:

https://bugs.freedesktop.org/show_bug.cgi?id=107085
Comment 1 Sam Fowler 2018-07-03 05:42:08 UTC 
Created accountsservice tracking bugs for this issue:

Affects: fedora-all [bug 1597497]
Comment 3 Sam Fowler 2018-07-03 05:42:55 UTC 
openSUSE Bug:

https://bugzilla.novell.com/show_bug.cgi?id=1099699
Comment 4 Tomas Hoger 2018-07-13 19:17:39 UTC 

*** This bug has been marked as a duplicate of bug 1601019 ***
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