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AUSCERT External Security Bulletin Redistribution
ESB-2016.2470
SOL76314525: Samba vulnerabilities CVE-2015-5252 and CVE-2015-5299
24 October 2016
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AusCERT Security Bulletin Summary
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Product: F5 ARX
Publisher: F5 Networks
Operating System: Network Appliance
Virtualisation
Impact/Access: Access Privileged Data -- Remote/Unauthenticated
Modify Arbitrary Files -- Remote/Unauthenticated
Resolution: None
CVE Names: CVE-2015-5299 CVE-2015-5252
Reference: ESB-2016.1158
ESB-2016.0672
ESB-2016.0002
Original Bulletin:
https://support.f5.com/kb/en-us/solutions/public/k/76/sol76314525.html
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SOL76314525: Samba vulnerabilities CVE-2015-5252 and CVE-2015-5299
Security Advisory
Original Publication Date: 10/23/2016
Vulnerability Description
CVE-2015-5252
vfs.c in smbd in Samba 3.x and 4.x before 4.1.22, 4.2.x before 4.2.7, and
4.3.x before 4.3.3, when share names with certain substring relationships
exist, allows remote attackers to bypass intended file-access restrictions via
a symlink that points outside of a share.
CVE-2015-5299
The shadow_copy2_get_shadow_copy_data function in modules/vfs_shadow_copy2.c
in Samba 3.x and 4.x before 4.1.22, 4.2.x before 4.2.7, and 4.3.x before 4.3.3
does not verify that the DIRECTORY_LIST access right has been granted, which
allows remote attackers to access snapshots by visiting a shadow copy
directory.
Impact
A remote attacker may be able to exploit this vulnerability to bypass intended
file-access restrictions when Samba is used in conjunction with CIFS.
Security Issue Status
F5 Product Development has assigned ID 477733 (ARX) to this vulnerability.
To determine if your release is known to be vulnerable, the components or
features that are affected by the vulnerability, and for information about
releases or hotfixes that address the vulnerability, refer to the following
table:
Product Versions known to be vulnerable Versions known to be not vulnerable Severity Vulnerable component or feature
ARX 6.2.0 - 6.4.0 None Low Samba
Vulnerability Recommended Actions
If you are running a version listed in the Versions known to be vulnerable
column, you can eliminate this vulnerability by upgrading to a version listed
in the Versions known to be not vulnerable column. If the table lists only an
older version than what you are currently running, or does not list a
non-vulnerable version, then no upgrade candidate currently exists.
Mitigation
None
Supplemental Information
SOL9970: Subscribing to email notifications regarding F5 products
SOL9957: Creating a custom RSS feed to view new and updated documents
SOL4602: Overview of the F5 security vulnerability response policy
SOL4918: Overview of the F5 critical issue hotfix policy
SOL167: Downloading software and firmware from F5
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The University of Queensland
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