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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.015 (73.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 73.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000
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), 009.014\(002.106\)
- Cisco Asa 5512-X
- Cisco Asa 5512-X Firmware — versions 009.009\(002.085\), 009.014(002.106), 009.014\(002.106\)
- Cisco Asa 5515-X
- Cisco Asa 5515-X Firmware — versions 009.009\(002.085\), 009.014(002.106), 009.014\(002.106\)
- Cisco Asa 5525-X
- Cisco Asa 5525-X Firmware — versions 009.009\(002.085\), 009.014(002.106), 009.014\(002.106\)
Weakness classification (CWE)
References
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-d… (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.