EN

CVE-2024-20331

Medium
6.8
0.05.010.0
Year
2024
Published
Oct 23, 2024
Known Affected Devices
0
CVSS Score
6.8

What is CVE-2024-20331?

A vulnerability in the session authentication functionality of the Remote Access SSL VPN feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to prevent users from authenticating. This vulnerability is due to insufficient entropy in the authentication process. An attacker could exploit this vulnerability by determining the handle of an authenticating user and using it to terminate their authentication session. A successful exploit could allow the attacker to force a user to restart the authentication process, preventing a legitimate user from establishing remote access VPN sessions.

CVSS Vector Breakdown

CVSS 3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
AV
Attack Vector
Network

Exploitable remotely over the network without requiring access to the local system.

AC
Attack Complexity
High

Exploit requires specific conditions, timing, or configuration to succeed.

PR
Privileges Required
None

No authentication required. Any anonymous user can exploit this vulnerability.

UI
User Interaction
None

No user interaction required. Exploit runs without any victim action.

S
Scope
Changed

Exploiting the vulnerability can affect other components beyond the vulnerable one.

C
Confidentiality Impact
None

No confidentiality impact. Sensitive data is not exposed.

I
Integrity Impact
None

No integrity impact. Data cannot be modified.

A
Availability Impact
High

Complete denial of service. The component becomes fully unavailable.

Known Affected Devices

Cisco Cisco ISR 927 Cisco Cisco ISR 931 Cisco Cisco ASR 1009-X Cisco Cisco ASR 9910 Cisco Cisco ASR 9912 Cisco Cisco Catalyst 2960L-24TS-LL Cisco Cisco Catalyst 9200-24T Cisco Cisco Catalyst 9300-48T Cisco Cisco Catalyst 9300-48U Cisco Cisco Catalyst 9300L-48T-4G Cisco Cisco Catalyst 9404R Cisco Cisco Catalyst 9407R Cisco Cisco Catalyst 9500-32C Cisco Cisco Catalyst 9600-40YC Cisco Cisco Nexus 9508 Cisco Cisco ASA 5585-X SSP-20 Cisco Cisco Firepower 2140 Cisco Cisco Firepower 4112 Cisco Cisco Firepower 4140 Cisco Cisco Catalyst 9800-CL Cisco Cisco Meraki MS390-24

FAQ

How severe is CVE-2024-20331?

CVE-2024-20331 has a CVSS score of 6.8/10, rated as Medium. Review the affected products list and apply vendor patches.

What does the CVSS score mean for CVE-2024-20331?

CVSS (Common Vulnerability Scoring System) rates vulnerability severity from 0.0 to 10.0. CVE-2024-20331 scores 6.8/10 (Medium). Scores 9.0–10.0 are Critical, 7.0–8.9 are High, 4.0–6.9 are Medium, and below 4.0 are Low.

Which devices are affected by CVE-2024-20331?

The list of devices confirmed to be affected by CVE-2024-20331 is shown in the "Affected Devices" section above. Check your firmware version against the vendor security advisory and apply the latest patch.

How do I fix or mitigate CVE-2024-20331?

Apply the latest firmware or software update from the vendor. Check the References section above for official advisories and patch notes. If no patch is available, consider disabling the affected feature or isolating the device from untrusted networks.