Cisco Security Advisory
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AV:N/AC:L/Au:N/C:N/I:N/A:P/E:F/RL:U/RC:C
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A vulnerability in the Server Message Block Protocol (SMB) module of Cisco Wide Area Application Services (WAAS) could allow an unauthenticated, remote attacker to cause a reload of the SMB module.
The vulnerability is due to improper input validation. An attacker could exploit this vulnerability by sending a crafted SMB Negotiate Protocol Request packet with an invalid field to a targeted device. A successful exploit could allow the attacker to cause a reload of the SMB module on the device, resulting in a partial denial of service (DoS) condition.
Cisco has confirmed the vulnerability; however, software updates are not available.
To exploit this vulnerability, an attacker may need access to trusted, internal networks to send a crafted SMB Negotiate Protocol Request packet to the device. This access requirement may limit the possibility of a successful exploit.
Cisco indicates through the CVSS score that functional exploit code exists; however, the code is not known to be publicly available.
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Cisco has released bug ID CSCuv41501 for registered users, which contains additional details and an up-to-date list of affected product versions.
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Administrators are advised to contact the vendor regarding future updates and releases.
Administrators are advised to allow only trusted users to have network access.
Administrators can help protect affected systems from external attacks by using a solid firewall strategy.
Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.
Administrators are advised to monitor affected systems.
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Software updates are not available.
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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.
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To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.
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Show LessVersion Description Section Status Date 2.0 IntelliShield has updated this alert to change the bug identifier and added affected releases related to Cisco Wide Area Application Services server message block protocol module denial of service vulnerability. NA Final 2015-Jul-27 1.0 Cisco Wide Area Application Services contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service condition. Updates are not available. NA Final 2015-May-14
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