Headline
CVE-2021-1563: Cisco Security Advisory: Cisco Video Surveillance 7000 Series IP Cameras Cisco Discovery Protocol and Link Layer Discovery Protocol Memory Leak Vulnerabilities
Multiple vulnerabilities in the implementation of the Cisco Discovery Protocol and Link Layer Discovery Protocol (LLDP) for Cisco Video Surveillance 7000 Series IP Cameras could allow an unauthenticated, adjacent attacker to cause a memory leak, which could lead to a denial of service (DoS) condition on an affected device. These vulnerabilities are due to incorrect processing of certain Cisco Discovery Protocol and LLDP packets at ingress time. An attacker could exploit these vulnerabilities by sending crafted Cisco Discovery Protocol or LLDP packets to an affected device. A successful exploit could allow the attacker to cause the affected device to continuously consume memory, which could cause the device to crash and reload, resulting in a DoS condition. Note: Cisco Discovery Protocol and LLDP are Layer 2 protocols. To exploit these vulnerabilities, an attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent).
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Summary
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Multiple vulnerabilities in the implementation of the Cisco Discovery Protocol and Link Layer Discovery Protocol (LLDP) for Cisco Video Surveillance 7000 Series IP Cameras could allow an unauthenticated, adjacent attacker to cause a memory leak, which could lead to a denial of service (DoS) condition on an affected device.
These vulnerabilities are due to incorrect processing of certain Cisco Discovery Protocol and LLDP packets at ingress time. An attacker could exploit these vulnerabilities by sending crafted Cisco Discovery Protocol or LLDP packets to an affected device. A successful exploit could allow the attacker to cause the affected device to continuously consume memory, which could cause the device to crash and reload, resulting in a DoS condition.
Note: Cisco Discovery Protocol and LLDP are Layer 2 protocols. To exploit these vulnerabilities, an attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent).
Cisco has released software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities.
This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ipcamera-lldpcdp-mem-yTQDmjRO
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Affected Products
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At the time of publication, these vulnerabilities affected Cisco Video Surveillance 7000 Series IP Cameras firmware releases earlier than Release 2.12.4.
See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information.
Only products listed in the Vulnerable Products section of this advisory are known to be affected by these vulnerabilities.
Cisco has confirmed that these vulnerabilities do not affect the following Cisco products:
- Video Surveillance 3000 Series IP Cameras
- Video Surveillance 4000 Series High-Definition IP Cameras
- Video Surveillance 4300E High-Definition IP Cameras
- Video Surveillance 4500E High-Definition IP Cameras
- Video Surveillance 6000 Series IP Cameras
- Video Surveillance 8000 Series IP Cameras
- Video Surveillance PTZ IP Cameras
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Workarounds
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- There are no workarounds that address these vulnerabilities.
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Fixed Software
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When considering software upgrades, customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories page, to determine exposure and a complete upgrade solution.
In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers.
Fixed Releases
At the time of publication, Cisco Video Surveillance 7000 Series IP Cameras firmware releases 2.12.4 and later contained the fix for these vulnerabilities.
To download the firmware updates from the Software Center on Cisco.com, click Browse all, choose Connected Safety and Security > Video Surveillance IP Cameras > Video Surveillance 7000 Series IP Cameras, and then choose the correct camera model.
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Exploitation and Public Announcements
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- The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory.
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Source
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- Cisco would like to thank Qian Chen of Qihoo 360 Nirvan Team for reporting these vulnerabilities.
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Cisco Security Vulnerability Policy
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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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URL
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Revision History
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Version
Description
Section
Status
Date
1.1
Added new firmware release to complete the vulnerability fixes.
Vulnerable Products, Fixed Software
Final
2021-JUL-07
1.0
Initial public release.
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Final
2021-JUN-02
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Legal Disclaimer
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