SB2021092425 - Denial of service in Cisco IOS and IOS XE Software
Published: September 24, 2021
Security Bulletin ID
SB2021092425
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper Interaction Between Multiple Correctly-Behaving Entities (CVE-ID: CVE-2021-34699)
CWE-ID: CWE-435 - Improper Interaction Between Multiple Correctly-Behaving Entities
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/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 an improper interaction between the web UI and the CLI parser. A remote authenticated attacker can request a particular CLI command to be run through the web UI and cause a denial of service condition on the target system.
Remediation
Install update from vendor's website.