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AUSCERT External Security Bulletin Redistribution
Cisco Video Surveillance 7000 Series IP Cameras Link Layer
Discovery Protocol Memory Leak Vulnerabilities
8 July 2021
AusCERT Security Bulletin Summary
Product: Cisco Video Surveillance Products
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Denial of Service -- Remote/Unauthenticated
CVE Names: CVE-2021-1598 CVE-2021-1597 CVE-2021-1596
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Cisco Video Surveillance 7000 Series IP Cameras Link Layer Discovery Protocol
Memory Leak Vulnerabilities
Advisory ID: cisco-sa-ipcamera-lldp-mem-wGqundTq
First Published: 2021 July 7 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvy61465
CVE Names: CVE-2021-1595 CVE-2021-1596 CVE-2021-1597 CVE-2021-1598
o Multiple vulnerabilities in the Link Layer Discovery Protocol (LLDP)
implementation 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 LLDP
packets at ingress time. An attacker could exploit these vulnerabilities by
sending crafted 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: LLDP is a Layer 2 protocol. To exploit these vulnerabilities, an
attacker must be in the same broadcast domain as the affected device (Layer
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:
o Vulnerable Products
At the time of publication, these vulnerabilities affected Cisco Video
Surveillance 7000 Series IP Cameras firmware releases earlier than Release
See the Details section in the bug ID(s) at the top of this advisory for
the most complete and current information.
Products Confirmed Not Vulnerable
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
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
o There are no workarounds that address these vulnerabilities.
o 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
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
At the time of publication, Cisco Video Surveillance 7000 Series IP Cameras
firmware releases 2.12.4 and later contained the fix for these
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.
Exploitation and Public Announcements
o 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.
o Cisco would like to thank Qian Chen of Codesafe Team of Legendsec at
Qi'anxin Group for reporting these vulnerabilities.
Cisco Security Vulnerability Policy
o 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.
| Version | Description | Section | Status | Date |
| 1.0 | Initial public release. | - | Final | 2021-JUL-07 |
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