NULL pointer dereference in Cisco Firepower Threat Defense Software
CVE-2024-20339
A vulnerability in the TLS processing feature of Cisco Firepower Threat Defense (FTD) Software for Cisco Firepower 2100 Series could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to an issue that occurs when TLS traffic is processed. An attacker could exploit this vulnerability by sending certain TLS traffic over IPv4 through an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition and impacting traffic to and through the affected device.
EPSS: 0.007 (51.2th 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 Firepower Threat Defense Software — versions 6.2.3, 6.2.3.9, 6.2.3.1
- Cisco Firepower_threat_defense_software — versions 6.2.3, 6.2.3.1, 6.2.3.2
- Cisco Secure_firewall_threat_defense — versions 6.2.3, 6.2.3.1, 6.2.3.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- psirt@cisco.com (Vendor Advisory)
- psirt@cisco.com (Broken Link)
- psirt@cisco.com (Vendor Advisory)
Frequently asked questions
- What is CVE-2024-20339?
- CVE-2024-20339 is a high-severity vulnerability in Cisco Firepower Threat Defense Software, classified under NULL Pointer Dereference. CVSS score: 8.6/10. Published 2024-10-23.
- How severe is CVE-2024-20339?
- High severity. CVSS v3 base score is 8.6 out of 10.
- Is CVE-2024-20339 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.