EN

CVE-2024-20307

Medium
6.8
0.05.010.0
Year
2024
Published
Mar 27, 2024
Known Affected Devices
0
CVSS Score
6.8

What is CVE-2024-20307?

A vulnerability in the IKEv1 fragmentation code of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a heap overflow, resulting in an affected device reloading. This vulnerability exists because crafted, fragmented IKEv1 packets are not properly reassembled. An attacker could exploit this vulnerability by sending crafted UDP packets to an affected system. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. Note: Only traffic that is directed to the affected system can be used to exploit this vulnerability. This vulnerability can be triggered by IPv4 and IPv6 traffic.

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 ASR 1002-HX Cisco Cisco ASR 9912 Cisco Cisco Catalyst 3650-24TS-L Cisco Cisco Catalyst 9200-24T Cisco Cisco Catalyst 9300L-24T-4G Cisco Cisco Catalyst 9407R Cisco Cisco Catalyst 9500-16X Cisco Cisco Catalyst 9600-40YC Cisco Cisco Nexus 7010 Cisco Cisco Nexus 9364C Cisco Cisco ASA 5515-X Cisco Cisco Firepower 4140 Cisco Cisco Firepower 4150 Cisco Cisco Meraki MS390-48U

FAQ

How severe is CVE-2024-20307?

CVE-2024-20307 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-2024-20307?

CVSS (Common Vulnerability Scoring System) rates vulnerability severity from 0.0 to 10.0. CVE-2024-20307 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-2024-20307?

The list of devices confirmed to be affected by CVE-2024-20307 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-2024-20307?

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.