Buffer overflow in Cisco Asa 5505
CVE-2020-3283
A vulnerability in the Secure Sockets Layer (SSL)/Transport Layer Security (TLS) handler of Cisco Firepower Threat Defense (FTD) Software when running on the Cisco Firepower 1000 Series platform could allow an unauthenticated, remote attacker to trigger a denial of service (DoS) condition on an affected device. The vulnerability is due to a communication error between internal functions. An attacker could exploit this vulnerability by sending a crafted SSL/TLS message to an affected device. A successful exploit could allow the attacker to cause a buffer underrun, which leads to a crash. The crash causes the affected device to reload.
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: 0.020 (80.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 80.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.020 · newest: 0.020 · change: +0.000
Affected products
- Cisco Asa 5505
- Cisco Asa 5505 Firmware — versions 9.13\(0.33\), 9.12(2.12), 9.13(0.33)
- Cisco Asa 5510
- Cisco Asa 5510 Firmware — versions 9.13\(0.33\), 9.12(2.12), 9.13(0.33)
- Cisco Asa 5512-X
- Cisco Asa 5512-X Firmware — versions 9.13\(0.33\), 9.12(2.12), 9.13(0.33)
- Cisco Asa 5515-X
- Cisco Asa 5515-X Firmware — versions 9.13\(0.33\), 9.12(2.12), 9.13(0.33)
- Cisco Asa 5520
- Cisco Asa 5520 Firmware — versions 9.13\(0.33\), 9.12(2.12), 9.13(0.33)
Weakness classification (CWE)
Public proof-of-concept exploits
References
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-tls-… (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2020-3283?
- CVE-2020-3283 is a high-severity vulnerability in Cisco Asa 5505, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.6/10. Published 2020-05-06.
- How severe is CVE-2020-3283?
- High severity. CVSS v3 base score is 8.6 out of 10.
- Is CVE-2020-3283 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.