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                             CERT-Renater

                 Note d'Information No. 2018/VULN092
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DATE                : 08/03/2018

HARDWARE PLATFORM(S): Cisco Web Security Appliance.

OPERATING SYSTEM(S): Cisco AsyncOS for Cisco Web Security Appliance
                                  versions 10.5.1.

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https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180307-wsa
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Cisco Security Advisory: Cisco Web Security Appliance FTP Authentication
Bypass Vulnerability

Advisory ID: cisco-sa-20180307-wsa

Revision: 1.0

For Public Release: 2018 March 7 16:00 GMT

Last Updated: 2018 March 7 16:00 GMT

CVE ID(s): CVE-2018-0087

CVSS Score v(3): 7.3 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

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Summary
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A vulnerability in the FTP server of the Cisco Web Security Appliance
(WSA) could allow an unauthenticated, remote attacker to log in to the
FTP server of the device without a valid password. The attacker does
need to have a valid username.

The vulnerability is due to incorrect FTP user credential validation. An
attacker could exploit this vulnerability by using FTP to connect to the
management IP address of the targeted device. A successful exploit could
allow the attacker to log in to the FTP server of the Cisco WSA without
having a valid password.

Cisco has released software updates that address this vulnerability.
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-20180307-wsa
["https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180307-wsa"]

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+ CERT-RENATER          | tel : 01-53-94-20-44           +
+ 23 - 25 Rue Daviel    | fax : 01-53-94-20-41           +
+ 75013 Paris           | email: cert@support.renater.fr +
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