Assessment
Why it matters
CISA lists this vulnerability as known to be exploited; exploitation is confirmed; EPSS is 69.3%; technical severity is CVSS 7.5.
A vulnerability in the web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to retrieve memory contents on an affected device, which could lead to the disclosure of confidential information. The vulnerability is due to a buffer tracking issue when the software parses invalid URLs that are requested from the web services interface. An attacker could exploit this vulnerability by sending a crafted GET request to the web services interface. A successful exploit could allow the attacker to retrieve memory contents, which could lead to the disclosure of confidential information. Note: This vulnerability affects only specific AnyConnect and WebVPN configurations. For more information, see the Vulnerable Products section.
Who should care
- Teams operating Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD), Adaptive Security Appliance Software, Secure Firewall Threat Defense
- Vulnerability and exposure management teams
- Security operations teams monitoring exploitation activity
Response plan
What I would do
- Confirm whether Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD), Adaptive Security Appliance Software, Secure Firewall Threat Defense is present in the environment.
- Identify affected versions and establish whether vulnerable services are exposed or reachable.
- Cisco Security advisory Cisco Sa Asaftd Info Disclose 9eJtycMB
- Review relevant security telemetry for evidence of attempted or successful exploitation.
- Document the remediation decision and track it to verified completion.
Treatment intelligence
Remediation intelligence
Vendor sources are listed before government and third-party guidance. Confirm product applicability and change prerequisites before deployment.
Technical details
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- CWE
- CWE-200
- Affected versions
- Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD); Cisco Adaptive Security Appliance Software (Start Including 9.8, End Excluding 9.8.4.20 | Start Including 9.9, End Excluding 9.9.2.67 | Start Including 9.10, End Excluding 9.10.1.40 | Start Including 9.12, End Excluding 9.12.3.9); Cisco Secure Firewall Threat Defense (Start Including 6.2.3, End Excluding 6.2.3.16 | Start Including 6.3.0, End Excluding 6.3.0.6 | Start Including 6.4.0, End Excluding 6.4.0.9 | Start Including 6.5.0, End Excluding 6.5.0.5)
- Fixed versions
- Cisco Adaptive Security Appliance Software (Fixed from 9.8.4.20, 9.9.2.67, 9.10.1.40, 9.12.3.9, 9.13.1.10); Cisco Secure Firewall Threat Defense (Fixed from 6.2.3.16, 6.3.0.6, 6.4.0.9, 6.5.0.5)
- Published
- 6 May 2020
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
Signal timeline
- CVE published
- Added to CISA KEV
- Latest EPSS score: 69.3%
- Signal calculated at 82