CVE-2024-20481
Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD): ASA and FTD Denial-of-Service
As of , CVE-2024-20481 in Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch soon.
- Exploited
- Yes: CISA listed it on 24 October 2024
- US federal deadline
- 14 November 202421 days after CISA listed it. US federal civilian agencies must fix it by then.
- Used in ransomware campaigns
- Not known to CISA
- EPSS score
- 0.16Higher than 96% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
- EPSS when listed
- 0.00 on 24 October 2024EPSS on the day CISA listed it.
- Public exploit
- None foundNeither Metasploit nor Exploit-DB lists one.
- Fix
- Vendor advice: sec.cloudapps.cisco.comLinks below, from CISA's entry.
What CISA says to do
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
CISA's required action
What the flaw is
Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) contain a missing release of resource after effective lifetime vulnerability that could allow an unauthenticated, remote attacker to cause a denial-of-service (DoS) of the RAVPN service.
CISA's description
A vulnerability in the Remote Access VPN (RAVPN) service of 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) of the RAVPN service. This vulnerability is due to resource exhaustion. An attacker could exploit this vulnerability by sending a large number of VPN authentication requests to an affected device. A successful exploit could allow the attacker to exhaust resources, resulting in a DoS of the RAVPN service on the affected device. Depending on the impact of the attack, a reload of the device may be required to restore the RAVPN service. Services that are not related to VPN are not affected. Cisco Talos discussed these attacks in the blog post Large-scale brute-force activity targeting VPNs, SSH services with commonly used login credentials.
The CVE record's description, from cisco
- CVE published
- 23 October 2024
- Assigned by
- cisco
- CVSS
- 5.8 Medium (CVSS 3.1, from the CNA)
- CWE-772
- Missing Release of Resource after Effective Lifetime
- CISA SSVC, exploitation
- active
- CISA SSVC, automatable
- yes
- CISA SSVC, technical impact
- partial
Timeline
- The CVE record was published.
- CISA added it to its list of exploited vulnerabilities.
- The US federal deadline to fix it.
Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD): other exploited entries
| Vulnerability | Product | Our group | Listed | Deadline | EPSS |
|---|---|---|---|---|---|
| CVE-2024-20353ASA and FTD Denial of Service | Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) | Patch this weekEPSS 0.71 | 0.71 | ||
| CVE-2020-3259ASA and FTD Information Disclosure | Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) | Patch this weekRansomware use; EPSS 0.72 | 0.72 | ||
| CVE-2020-3452ASA and FTD Read-Only Path Traversal | Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) | Patch this weekEPSS 0.99 | 0.99 | ||
| CVE-2020-3580ASA and FTD Cross-Site Scripting (XSS) | Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) | Patch this weekRansomware use; EPSS 0.86 | 0.86 | ||
| CVE-2024-20359ASA and FTD Privilege Escalation | Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) | Patch soon | 0.19 |
Read further
- CVE recordcve.org
- NVD entrynvd.nist.gov
- CISA's catalogcisa.gov
- EPSS for this CVEapi.first.org