EN

CVE-2024-20337

High
8.2
0.05.010.0
Year
2024
Published
Mar 6, 2024
Known Affected Devices
0
CVSS Score
8.2

What is CVE-2024-20337?

A vulnerability in the SAML authentication process of Cisco Secure Client could allow an unauthenticated, remote attacker to conduct a carriage return line feed (CRLF) injection attack against a user. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by persuading a user to click a crafted link while establishing a VPN session. A successful exploit could allow the attacker to execute arbitrary script code in the browser or access sensitive, browser-based information, including a valid SAML token. The attacker could then use the token to establish a remote access VPN session with the privileges of the affected user. Individual hosts and services behind the VPN headend would still need additional credentials for successful access.

CVSS Vector Breakdown

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

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

AC
Attack Complexity
Low

No special conditions required. Exploit can be performed reliably and repeatedly.

PR
Privileges Required
None

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

UI
User Interaction
Required

Victim must take an action (e.g. click a link, open a file) for the exploit to succeed.

S
Scope
Changed

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

C
Confidentiality Impact
High

Complete loss of confidentiality. All data on the component may be exposed.

I
Integrity Impact
Low

Attacker can modify some data, but scope or consequence is limited.

A
Availability Impact
None

No availability impact. Service remains fully operational.

Known Affected Devices

Cisco Cisco ISR 4461 Cisco Cisco ASR 1002-HX Cisco Cisco ASR 1004 Cisco Cisco ASR 1009-X Cisco Cisco ASR 9010 Cisco Cisco ASR 9901 Cisco Cisco Catalyst 9200L-48P-4G Cisco Cisco Catalyst 9200L-48P-4X Cisco Cisco Catalyst 9300-24U Cisco Cisco Catalyst 9300-48UXM Cisco Cisco Catalyst 9300L-48T-4G Cisco Cisco Catalyst 9404R Cisco Cisco ASA 5585-X SSP-20 Cisco Cisco Firepower 1120 Cisco Cisco Firepower 2120 Cisco Cisco Firepower 2130 Cisco Cisco Firepower 2140 Cisco Cisco Firepower 4112 Cisco Cisco Firepower 4125 Cisco Cisco Firepower 4140 Cisco Cisco Firepower 4145 Cisco Cisco Catalyst 9120AXE Cisco Cisco Catalyst 9800-40 Cisco Cisco Meraki MS390-24

FAQ

How severe is CVE-2024-20337?

CVE-2024-20337 has a CVSS score of 8.2/10, rated as High. This is a high severity vulnerability and should be patched as soon as possible.

What does the CVSS score mean for CVE-2024-20337?

CVSS (Common Vulnerability Scoring System) rates vulnerability severity from 0.0 to 10.0. CVE-2024-20337 scores 8.2/10 (High). 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-2024-20337?

The list of devices confirmed to be affected by CVE-2024-20337 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-2024-20337?

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.