Cisco Unified Computing System Software contains a vulnerability that could allow an unauthenticated, remote attacker to conduct man-in-the-middle attacks. Updates are available.
A vulnerability in the Cisco Unified Computing System Serial over LAN (SoL) implementation could allow an unauthenticated, remote attacker to
perform a man-in-the-middle (MITM) attack.
The vulnerability occurs because the Board Management Controller (BMC) uses a hard-coded private key. An
attacker could exploit this vulnerability by intercepting an SoL connection. A successful exploit could allow the attacker to view or
modify SoL communications.
Cisco has confirmed the vulnerability in a security notice and released software updates.
At the time this alert was first published, Cisco Unified Computing System Software versions 1.3 and prior were vulnerable. Later releases of Cisco Unified Computing System Software may also be vulnerable.
To exploit this vulnerability, it is likely that an attacker would need access to trusted, internal networks in which the targeted device may reside to intercept SoL communications. This access requirement limits the likelihood 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.
Cisco has released a security notice at the following link: CVE-2012-4074
Customers are advised to consult Cisco bug ID CSCte90338 for a complete list of affected product versions.
An unauthenticated, remote attacker could exploit this vulnerability to conduct a MITM attack that could be used to conduct further attacks.
The vulnerability is due to a design error in the affected software that exists because the BMC uses a hard-coded private key.
An unauthenticated, remote attacker could exploit this vulnerability by intercepting SoL communications established by the targeted device. Successful exploitation could allow the attacker to perform an MITM attack to view or modify SoL communications.
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have network access.
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.
Cisco customers with active contracts should contact their Cisco support team for assistance in upgrading to a software version that includes fixes for this vulnerability. Cisco customers without contracts may contact the Cisco Technical Assistance Center at 1-800-553-2447 or 1-408-526-7209 or via email at firstname.lastname@example.org for assistance.
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