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AUSCERT Security Bulletin
ASB-2010.0075
A flaw in samba can allow unauthorised filesystem access
10 March 2010
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AusCERT Security Bulletin Summary
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Product: samba
Operating System: UNIX variants (UNIX, Linux, OSX)
Impact/Access: Unauthorised Access -- Unknown/Unspecified
Resolution: Patch/Upgrade
CVE Names: CVE-2010-0728
Member content until: Friday, April 9 2010
OVERVIEW
Samba has released updated versions to fix a vulnerability which
allows unauthorised access to the file system.
IMPACT
Samba has released the following information on this vulnerability:
"This flaw caused all smbd processes to inherit CAP_DAC_OVERRIDE
capabilities, allowing all file system access to be allowed
even when permissions should have denied access.
Please note this security problem does not affect any platform that
does not support capabilities and platforms where binaries were built
without libcap support." [1]
MITIGATION
Samba has released versions 3.5.1, 3.4.7 and 3.3.12 to resolve this
issue. [2]
It is expected that vendors who package samba will update their
packages shortly to incorporate this fix.
REFERENCES
[1] CVE-2010-0728
http://www.samba.org/samba/security/CVE-2010-0728
[2] Samba Security Releases
http://www.samba.org/samba/history/security.html
AusCERT has made every effort to ensure that the information contained
in this document is accurate. However, the decision to use the information
described is the responsibility of each user or organisation. The decision to
follow or act on information or advice contained in this security bulletin is
the responsibility of each user or organisation, and should be considered in
accordance with your organisation's site policies and procedures. AusCERT
takes no responsibility for consequences which may arise from following or
acting on information or advice contained in this security bulletin.
If you believe that your computer system has been compromised or attacked in
any way, we encourage you to let us know by completing the secure National IT
Incident Reporting Form at:
http://www.auscert.org.au/render.html?it=3192
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Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
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