Cisco Unified Customer Voice Portal contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service condition on a targeted device. Updates are available.
Cisco Unified Customer Voice Portal (Unified CVP) contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition.
The vulnerability is due to improper handling of crafted Session Initiation Protocol (SIP) INVITE packets by the CallServer component of the Cisco Unified CVP software. An unauthenticated, remote attacker could exploit the vulnerability by sending malicious SIP INVITE packets to a targeted device. A successful exploit could prevent the targeted system from accepting new calls, denying service to legitimate users.
Cisco has confirmed the vulnerability in a security advisory and has released software updates.
Cisco Unified CVP software versions prior to 9.0.1 ES 11 are vulnerable.
To exploit this vulnerability, an attacker may require access to trusted, internal networks to send crafted requests to the affected software. This access requirement could limit 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.
An unauthenticated, remote attacker could exploit the vulnerability to prevent a targeted system from accepting new calls, denying service to legitimate users.
The vulnerability is due to improper handling of crafted SIP INVITE packets by the CallServer component of the Cisco Unified CVP software.
An unauthenticated, remote attacker could exploit the vulnerability by sending crafted SIP INVITE packets to a targeted device. When the affected software processes the malicious packets, an unspecified error could cause the device to stop accepting new calls. A successful exploit could allow the attacker to cause a DoS condition.
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 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 firstname.lastname@example.org
The security vulnerability applies to the following combinations of products.
Cisco Unified Customer Voice Portal (CVP)
7.0 base, (1) | 8.5 (1) | 9.0 (1)
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