Buffer overflow in Cisco Adaptive Security Appliance
CVE-2021-40117
A vulnerability in SSL/TLS message handler for Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability exists because incoming SSL/TLS packets are not properly processed. An attacker could exploit this vulnerability by sending a crafted SSL/TLS packet to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition.
Vulnerability class: Buffer Overflow
EPSS: 0.015 (71.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.
Affected products
- Cisco Adaptive_security_appliance
- Cisco Adaptive_security_appliance_software
- Cisco Asa_5505
- Cisco Asa_5505_firmware — versions 009.009\(002.085\), 009.014\(002.106\)
- Cisco Asa_5512-x
- Cisco Asa_5512-x_firmware — versions 009.009\(002.085\), 009.014\(002.106\)
- Cisco Asa_5515-x
- Cisco Asa_5515-x_firmware — versions 009.009\(002.085\), 009.014\(002.106\)
- Cisco Asa_5525-x
- Cisco Asa_5525-x_firmware — versions 009.009\(002.085\), 009.014\(002.106\)
Weakness classification (CWE)
References
- psirt@cisco.com (x_refsource_CISCO, vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-40117?
- CVE-2021-40117 is a high-severity vulnerability in Cisco Adaptive Security Appliance, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.6/10. Published 2021-10-27.
- How severe is CVE-2021-40117?
- High severity. CVSS v3 base score is 8.6 out of 10.