Security News > 2021 > September > Cisco fixes highly critical vulnerabilities in IOS XE Software
Cisco has patched three critical vulnerabilities affecting components in its IOS XE internetworking operating system powering routers and wireless controllers, or products running with a specific configuration.
The worst of the flaws received the highest severity rating, 10 out of 10; it affects the Cisco Catalyst 9000 Family Wireless Controllers that includes the enterprise-class Catalyst 9800-CL Wireless Controllers for Cloud.
The security issues are part of Cisco's updates for September 2021 and the full list of fixes counts 31 bugs, with more than a dozen of them being rated with a high-severity score or worse.
At the top of the list in terms of severity is CVE-2021-34770, a vulnerability that could be exploited remotely by an unauthenticated attacker to run arbitrary code with root privileges, a Cisco advisory informs.
Caused by insufficient bounds checking, it is in the vDaemon process in Cisco IOS XE SD-WAN Software, Cisco notes.
Last on the list of critical bugs that Cisco patched this month is CVE-2021-1619, a security issue in the authentication, authorization, and accounting function of Cisco IOS XE software.
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Related Vulnerability
| DATE | CVE | VULNERABILITY TITLE | RISK |
|---|---|---|---|
| 2021-09-23 | CVE-2021-34770 | Out-of-bounds Write vulnerability in Cisco IOS XE A vulnerability in the Control and Provisioning of Wireless Access Points (CAPWAP) protocol processing of Cisco IOS XE Software for Cisco Catalyst 9000 Family Wireless Controllers could allow an unauthenticated, remote attacker to execute arbitrary code with administrative privileges or cause a denial of service (DoS) condition on an affected device. | 7.2 |
| 2021-09-23 | CVE-2021-1619 | Use of Uninitialized Resource vulnerability in Cisco products A vulnerability in the authentication, authorization, and accounting (AAA) function of Cisco IOS XE Software could allow an unauthenticated, remote attacker to bypass NETCONF or RESTCONF authentication and do either of the following: Install, manipulate, or delete the configuration of an affected device Cause memory corruption that results in a denial of service (DoS) on an affected device This vulnerability is due to an uninitialized variable. | 9.1 |