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CVE-2024-20307

HIGHCVSS 7.5/10EPSS 0.73%

Last modified

CVE-2024-20307 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 0.73% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
0.73%

49.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoIos15.1\(2\)sg8
CiscoIos15.1\(2\)sy8
CiscoIos15.1\(2\)sy9
CiscoIos15.1\(2\)sy10
CiscoIos15.1\(2\)sy11
CiscoIos15.1\(2\)sy12
CiscoIos15.1\(2\)sy13
CiscoIos15.1\(2\)sy14
CiscoIos15.1\(2\)sy15
CiscoIos15.1\(2\)sy16
CiscoIos15.2\(1\)sy3
CiscoIos15.2\(1\)sy4
CiscoIos15.2\(1\)sy5
CiscoIos15.2\(1\)sy6
CiscoIos15.2\(1\)sy7
CiscoIos15.2\(1\)sy8
CiscoIos15.2\(3\)e4
CiscoIos15.2\(3\)e5
CiscoIos15.2\(4\)e2
CiscoIos15.2\(4\)e3
CiscoIos15.2\(4\)e4
CiscoIos15.2\(4\)e5
CiscoIos15.2\(4\)e5a
CiscoIos15.2\(4\)e6
CiscoIos15.2\(4\)e7
CiscoIos15.2\(4\)e8
CiscoIos15.2\(4\)e9
CiscoIos15.2\(4\)e10
CiscoIos15.2\(4\)e10a
CiscoIos15.2\(4\)e10d
CiscoIos15.2\(4\)ea4
CiscoIos15.2\(4\)ea5
CiscoIos15.2\(4\)ea6
CiscoIos15.2\(4\)ea7
CiscoIos15.2\(4\)ea8
CiscoIos15.2\(4\)ea9
CiscoIos15.2\(4\)ea9a
CiscoIos15.2\(4\)ec1
CiscoIos15.2\(4\)ec2
CiscoIos15.2\(4\)m11
CiscoIos15.2\(5\)e
CiscoIos15.2\(5\)ea
CiscoIos15.2\(5b\)e
CiscoIos15.3\(1\)sy1
CiscoIos15.3\(1\)sy2
CiscoIos15.3\(3\)jpi11
CiscoIos15.3\(3\)m8
CiscoIos15.3\(3\)m8a
CiscoIos15.3\(3\)m9
CiscoIos15.3\(3\)m10

Showing 50 of 365 affected configurations. See NVD for the full list.

References

Timeline

Published
Last Modified
Status
Analyzed

Frequently Asked Questions

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.
How severe is CVE-2024-20307?
CVE-2024-20307 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.73% probability of exploitation in the next 30 days.
How do I fix CVE-2024-20307?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2024-20307?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST