Cisco CiscoWorks Common Services software contains a vulnerability that could allow an unauthenticated, remote attacker to execute code on a vulnerable system. Updates are available.
Description
Cisco CiscoWorks Common Services software contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code on a vulnerable system.
The vulnerability is due to a buffer overflow in the code of CiscoWorks Common Services. An authenticated, remote attacker could exploit this vulnerability to execute arbitrary code on the vulnerable system. Failed attempts will result in a denial of service (DoS) condition.
Cisco has confirmed this vulnerability and released updated software.
Warning Indicators
Cisco CiscoWorks Common Services software versions prior to 4.0 for both Oracle and Microsoft Windows are vulnerable.
IntelliShield Analysis
It is likely that an attacker would need to have access to an internal or private network to exploit this vulnerability. This requirement could mitigate attempts to exploit this vulnerability.
Administrators may also consider adding filters that deny HTTPS packets that use TCP ports 443 and 1741. These filters should be deployed throughout the network as part of the tACL policy described in the Safeguards section of this alert. Further information about this procedure and tACLs is in the security advisory listed in the Vendor Announcements section.
Cisco indicates through the CVSS score that functional exploit code exists; however, the code is not known to be publicly available.
An unauthenticated, remote attacker could exploit this vulnerability to execute arbitrary code with system administrative privileges on a vulnerable system. Failed attempts will result in a DoS condition.
Technical Information
The vulnerability is related to a buffer overflow in the authentication code in the CiscoWorks Common Services web server module.
An unauthenticated, remote attacker could exploit this vulnerability over TCP port 443 or 1741 to execute arbitrary code with system administrative privileges on a vulnerable system. Failed attempts will cause the web server to crash, resulting in a DoS condition.
Safeguards
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have network access.
Administrators are advised to implement an intrusion prevention system (IPS) or intrusion detection system (IDS) to help detect and prevent attacks that attempt to exploit this vulnerability.
Administrators are advised to monitor affected systems.
Administrators may consider using filters such as transit access control lists (tACLs) to allow access to the Administration Workstation from trusted hosts.
Administrators may consider changing the default HTTP and HTTPS ports on the affected server.
The Cisco Applied Intelligence team has created the following companion document to guide administrators in identifying and mitigating attempts to exploit this vulnerability prior to applying updated software: cisco-amb-20101027
Patches/Software
Cisco customers with active contracts can obtain updates through the Software Center at the following link: Cisco. Cisco customers without contracts can obtain upgrades by contacting the Cisco Technical Assistance Center at 1-800-553-2447 or 1-408-526-7209 or via e-mail at tac@cisco.com.
Signatures
Cisco Systems Cisco Intrusion Prevention System (IPS) 6.0
The security vulnerability applies to the following combinations of products.
Primary Products:
Cisco
CiscoWorks Common Services (CS)
3.0 .5, .6 | 3.1 .1, Base | 3.2 Base | 3.3 Base
Associated Products:
N/A
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