SB2020102213 - CRLF injection in Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software
Published: October 22, 2020
Security Bulletin ID
SB2020102213
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) CRLF injection (CVE-ID: CVE-2020-3561)
CWE-ID: CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to inject arbitrary data in server response.
The vulnerability exists due to insufficient validation of attacker-supplied data in the Clientless SSL VPN (WebVPN). A remote attacker can trick a victim to click a specially crafted link and redirect the user to arbitrary websites.
Remediation
Install update from vendor's website.