SB2021032417 - Denial of serivce when handling DECnet traffic in Cisco IOS XE
Published: March 24, 2021
Security Bulletin ID
SB2021032417
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Adjecent network
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use of Out-of-range Pointer Offset (CVE-ID: CVE-2021-1352)
CWE-ID: CWE-823 - Use of Out-of-range Pointer Offset
CVSSv4: 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
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.
Remediation
Install update from vendor's website.