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Bug 1459464 - (CVE-2017-9461) CVE-2017-9461 samba: fd_open_atomic infinite loop due to wrong handling of dangling symlinks
CVE-2017-9461 samba: fd_open_atomic infinite loop due to wrong handling of da...
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
low Severity low
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Assigned To: Red Hat Product Security
impact=low,public=20170216,reported=2...
: Security
Depends On: 1461021 1469906
Blocks: 1415638 1459466
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Reported: 2017-06-07 04:52 EDT by Adam Mariš
Modified: 2017-09-21 00:46 EDT (History)
18 users (show)

See Also:
Fixed In Version: samba 4.4.10, samba 4.5.6
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in the way Samba handled dangling symlinks. An authenticated malicious Samba client could use this flaw to cause the smbd daemon to enter an infinite loop and use an excessive amount of CPU and memory.
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Description Adam Mariš 2017-06-07 04:52:10 EDT
smbd in Samba before 4.4.10 and 4.5.x before 4.5.6 has a denial of service vulnerablity (fd_open_atomic infinite loop with high CPU usage and memory consumption) due to wrongly handling dangling symlinks.

Upstream patch:

https://git.samba.org/?p=samba.git;a=commit;h=10c3e3923022485c720f322ca4f0aca5d7501310
Comment 2 Huzaifa S. Sidhpurwala 2017-06-27 04:09:01 EDT
There is an upstream bug at:
https://bugzilla.samba.org/show_bug.cgi?id=12572
Comment 5 errata-xmlrpc 2017-08-01 03:47:30 EDT
This issue has been addressed in the following products:

  Red Hat Gluster Storage 3.2 for RHEL 7

Via RHSA-2017:2338 https://access.redhat.com/errata/RHSA-2017:2338
Comment 6 errata-xmlrpc 2017-08-01 14:22:43 EDT
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:1950 https://access.redhat.com/errata/RHSA-2017:1950
Comment 7 errata-xmlrpc 2017-09-21 00:46:58 EDT
This issue has been addressed in the following products:

  Red Hat Gluster Storage 3.3 for RHEL 6

Via RHSA-2017:2778 https://access.redhat.com/errata/RHSA-2017:2778

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