Cisco SD-WAN vManage Software – Multiple Vulnerabilities

CVE numbers = CVE-2021-1137, CVE-2021-1479 and CVE-2021-1480

Multiple vulnerabilities in Cisco SD-WAN vManage Software could allow an unauthenticated, remote attacker to execute arbitrary code or allow an authenticated, local attacker to gain escalated privileges on an affected system.

These vulnerabilities affect Cisco devices if they are running a vulnerable release of Cisco SD-WAN vManage Software.

Cisco has released software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities.

CVE-2021-1479: Cisco SD-WAN vManage Remote Management Buffer Overflow Vulnerability

A vulnerability in a remote management component of Cisco SD-WAN vManage Software could allow an unauthenticated, remote attacker to cause a buffer overflow condition. The vulnerability is due to improper validation of user-supplied input to the vulnerable component. An attacker could exploit this vulnerability by sending a crafted connection request to the vulnerable component that, when processed, could cause a buffer overflow condition. A successful exploit could allow the attacker to execute arbitrary code on the underlying operating system with root privileges.

Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

CVE-2021-1137: Cisco SD-WAN vManage Privilege Escalation Vulnerability

A vulnerability in the user management function of Cisco SD-WAN Software could allow an authenticated, local attacker to gain escalated privileges on the underlying operating system.

The vulnerability is due to insufficient input validation by the affected software. An authenticated attacker who has permissions to add new users or groups on the vManage system could exploit this vulnerability by modifying a user account. A successful exploit could allow the attacker to gain root privileges on the underlying operating system.  

Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

CVE-2021-1480: Cisco SD-WAN vManage Privilege Escalation Vulnerability

A vulnerability in system file transfer functions of Cisco SD-WAN Software could allow an authenticated, local attacker to gain escalated privileges on the underlying operating system.

The vulnerability is due to improper validation of input to the system file transfer functions. An authenticated attacker could exploit this vulnerability by sending specially crafted requests to the vulnerable system. A successful exploit could allow the attacker to overwrite arbitrary files and modify the system in such a way that could allow the attacker to gain root privileges on the underlying operating system.

Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

Duncan Newell

Duncan is a technology professional with over 20 years experience of working in various IT roles. He has a interest in cyber security, and has a wide range of other skills in radio, electronics and telecommunications.

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.

%d bloggers like this: