Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2018.0199
Cisco AnyConnect Profile Editor XML External Entity Injection Vulnerability
18 January 2018
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco AnyConnect Secure Mobility Client
Publisher: Cisco Systems
Operating System: Windows
Linux variants
OS X
Impact/Access: Modify Arbitrary Files -- Console/Physical
Read-only Data Access -- Console/Physical
Resolution: Patch/Upgrade
CVE Names: CVE-2018-0100
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180117-acpe
- --------------------------BEGIN INCLUDED TEXT--------------------
Cisco Security Advisory
Cisco AnyConnect Profile Editor XML External Entity Injection Vulnerability
Medium
Advisory ID: cisco-sa-20180117-acpe
First Published: 2018 January 17 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs:
CSCvg19341
CVSS Score:
Base 4.4
Base 4.4 CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:X/RL:X/RC:X
CVE-2018-0100
CWE-611
Summary
A vulnerability in the Profile Editor of the Cisco AnyConnect Secure Mobility
Client could allow an unauthenticated, local attacker to have read and write
access to information stored in the affected system.
The vulnerability is due to improper handling of the XML External Entity (XXE)
entries when parsing an XML file. An attacker could exploit this vulnerability
by injecting a crafted XML file with malicious entries, which could allow the
attacker to read and write files.
There are no workarounds that address this vulnerability.
This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180117-acpe
Affected Products
Vulnerable Products
This vulnerability affects Cisco AnyConnect VPN Client Software. For
information about affected software releases, consult the Cisco bug ID(s) at
the top of this advisory.
Products Confirmed Not Vulnerable
No other Cisco products are currently known to be affected by this
vulnerability.
Workarounds
There are no workarounds that address this vulnerability.
Fixed Software
For information about fixed software releases, consult the Cisco bug ID(s) at
the top of this advisory.
When considering software upgrades, customers are advised to regularly consult
the advisories for Cisco products, which are available from the Cisco Security
Advisories and Alerts page, to determine exposure and a complete upgrade
solution.
In all cases, customers should ensure that the devices to be upgraded contain
sufficient memory and confirm that current hardware and software
configurations will continue to be supported properly by the new release. If
the information is not clear, customers are advised to contact the Cisco
Technical Assistance Center (TAC) or their contracted maintenance providers.
Exploitation and Public Announcements
The Cisco Product Security Incident Response Team (PSIRT) is not aware of any
public announcements or malicious use of the vulnerability that is described
in this advisory.
Source Cisco would like to thank Alain Homewood of Insomnia Security for
reporting this vulnerability.
URL
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180117-acpe
Revision History
Version Description Section Status Date
1.0 Initial public release. Final 2018-January-17
LEGAL DISCLAIMER
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF
GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS
FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS
LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO
CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.
A standalone copy or paraphrase of the text of this document that omits the
distribution URL is an uncontrolled copy and may lack important information or
contain factual errors. The information in this document is intended for end
users of Cisco products.
- --------------------------END INCLUDED TEXT--------------------
You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.
NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. 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.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
https://www.auscert.org.au/bulletins/
===========================================================================
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.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967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=wtCu
-----END PGP SIGNATURE-----