#VU51708 Use of Out-of-range Pointer Offset in Cisco Systems, Inc products - CVE-2021-1352

Vulnerability identifier: #VU51708

Vulnerability risk: Medium

CVSSv4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

CVE-ID: CVE-2021-1352

CWE-ID: CWE-823

Exploitation vector: Adjecent network

Exploit availability: No public exploit available

Vulnerable software:
Cisco 2600 Series Multiservice Platforms
Cisco ASR 1000 Series Aggregation Services Routers
Cisco Cloud Services Router 1000V Series
Cisco Catalyst 3850 Series Switches
Cisco Catalyst 3650 Series Switches
Cisco 4000 Series Integrated Services Routers
Cisco 1000 Series Integrated Services Routers
Cisco Catalyst 9300 Series Switches
Cisco Catalyst 9500 Series Switches
Cisco Catalyst 9400 Series Switches
Cisco 1100 Series Industrial Integrated Services Routers
Cisco Catalyst 9200 Series Switches
Cisco Embedded Services 3300 Series Switches
Cisco Catalyst IE3200 Rugged Series
Cisco Catalyst IE3300 Rugged Series
Cisco Catalyst IE3400 Rugged Series
Cisco Catalyst 9600 Series Switches
Cisco Catalyst 9800 Series Wireless Controllers
Cisco Catalyst IE3400 Heavy Duty Series
Cisco IOS XE

Software vendor:
Cisco Systems, Inc

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper input validation within the DECnet Phase IV and DECnet/OSI protocol. A remote attacker on the local network can send specially crafted DECnet traffic to the affected device and perform a denial of service (DoS) attack.

Install updates from vendor's website.

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-decnet-dos-cuPWDkyL
• https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvv51476