CVE-2020-3259: Cisco ASA and FTD Information Disclosure Vulnerability

CISA Known Exploited Vulnerability (KEV)

Description

Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) contain an information disclosure vulnerability. An attacker could retrieve memory contents on an affected device, which could lead to the disclosure of confidential information due to a buffer tracking issue when the software parses invalid URLs that are requested from the web services interface. This vulnerability affects only specific AnyConnect and WebVPN configurations.

Required action (CISA)

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Notes

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-info-disclose-9eJtycMB; https://nvd.nist.gov/vuln/detail/CVE-2020-3259

Weakness behind it

CISA records this vulnerability as an instance of CWE-200. From there the chain continues into CAPEC attack patterns and ATT&CK techniques, all inside this corpus.

References

• NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-3259
• KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog