CVE-2021-1434: Cisco IOS XE SD-WAN Software Arbitrary File Corruption Vulnerability
A vulnerability in the CLI of Cisco IOS XE SD-WAN Software could allow an authenticated, local attacker to overwrite arbitrary files in the underlying file system. This vulnerability is due to insufficient validation of the parameters of a specific CLI command. An attacker could exploit this vulnerability by issuing that command with specific parameters. A successful exploit could allow the attacker to overwrite the content of any arbitrary file that resides on the underlying host file system.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2021-1434?
CVE-2021-1434 has a medium severity rating due to its ability to allow authenticated local attackers to overwrite arbitrary files.
How do I fix CVE-2021-1434?
To fix CVE-2021-1434, you need to upgrade Cisco IOS XE to a version where the vulnerability has been patched.
Which Cisco IOS XE versions are affected by CVE-2021-1434?
CVE-2021-1434 affects Cisco IOS XE versions 16.11.1, 16.11.1a, 16.11.1b, 16.11.1c, 16.11.1s, 16.12.1 through 16.12.3, and 17.2.1 series.
What type of attack can exploit CVE-2021-1434?
CVE-2021-1434 can be exploited by an authenticated local attacker to overwrite files on the underlying file system.
Is remote access required to exploit CVE-2021-1434?
No, CVE-2021-1434 does not require remote access as it can be exploited by an authenticated local attacker.