Vulnerability in Cisco Firepower Management Center
CVE-2020-3549
A vulnerability in the sftunnel functionality of Cisco Firepower Management Center (FMC) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to obtain the device registration hash. The vulnerability is due to insufficient sftunnel negotiation protection during initial device registration. An attacker in a man-in-the-middle position could exploit this vulnerability by intercepting a specific flow of the sftunnel communication between an FMC device and an FTD device. A successful exploit could allow the attacker to decrypt and modify the sftunnel communication between FMC and FTD devices, allowing the attacker to modify configuration data sent from an FMC device to an FTD device or alert data sent from an FTD device to an FMC device.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.010 (59.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 59.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.010 · change: +0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftdfmc-s… (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2020-3549?
- CVE-2020-3549 is a high-severity vulnerability in Cisco Firepower Management Center, classified under Inadequate Encryption Strength. CVSS score: 8.1/10. Published 2020-10-21.
- How severe is CVE-2020-3549?
- High severity. CVSS v3 base score is 8.1 out of 10.
- Is CVE-2020-3549 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.