Cisco Nexus 7000 M1-Series Modules contain a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service condition. Updates are not available.
Description
Cisco Nexus 7000 M1-Series Modules contain a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition.
The vulnerability is due to incorrect handling of crafted packets processed by the affected software. An unauthenticated, remote attacker could exploit this vulnerability by sending crafted packets to a targeted device. If successful, an attacker could cause the M1-Series module of the affected software to reload, resulting in a DoS condition.
Cisco has confirmed the vulnerability in a security notice; however, software updates are not available.
Warning Indicators
Cisco NX-OS Software versions 6.1 (0.208)S0) and prior are vulnerable.
IntelliShield Analysis
To exploit this vulnerability, an attacker must be able to submit crafted packets to the targeted device, likely requiring the attacker to access trusted, internal networks. 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.
Vendor Announcements
Cisco has released a security notice for bug ID CSCud15673 at the following link: CVE-2013-1122
Impact
An unauthenticated, remote attacker could exploit this vulnerability to cause an affected M1-Series module to reload, resulting in a DoS condition.
Technical Information
The vulnerability is due to incorrect handling of crafted packets processed by the affected software.
An unauthenticated, remote attacker could exploit this vulnerability by sending crafted packets to a targeted device that is configured with Overlay Transport Virtualization (OTV), where the physical interface of the connection is over the M1-Series module. If successful, an attacker could cause the M1-Series module of the affected software to reload, resulting in a DoS condition.
Safeguards
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 are advised to monitor affected systems.
The security vulnerability applies to the following combinations of products.
Primary Products:
Cisco
Cisco NX-OS Software
5.0 (3), (4), (5), (6) | 5.1 Base | 5.2(1) Base, S67 | 6.1 (0.208)S0, Base
Associated Products:
N/A
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