SB2020060512 - Insufficient verification of data authenticity in Cisco IOS XE Software
Published: June 5, 2020
Security Bulletin ID
SB2020060512
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 security vulnerability.
1) Insufficient verification of data authenticity (CVE-ID: CVE-2020-3220)
The vulnerability allows a remote attacker to disconnect legitimate IPsec VPN sessions to an affected device.
The vulnerability exists due to insufficient verification of authenticity of received Encapsulating Security Payload (ESP) packets. A remote attacker can tamper with ESP cleartext values as a man-in-the-middle and disconnect legitimate IPsec VPN sessions to an affected device.
This vulnerability affects the following products if they are running affected release of Cisco IOS XE Software:
- Cisco ASR 1000 Series Aggregation Services Routers
- Cisco Cloud Services Router 1000V Series
- Cisco 4000 Series Integrated Services Routers
- Cisco 1000 Series Integrated Services Routers
Remediation
Install update from vendor's website.