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CVE-2024-20308

HIGHCVSS 7.5/10EPSS 0.80%

Last modified

CVE-2024-20308 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 underflow, 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 0.80% 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 underflow, 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 denial of service (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
0.80%

52.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoIos12.4\(22\)md
CiscoIos12.4\(22\)md1
CiscoIos12.4\(22\)md2
CiscoIos12.4\(22\)mda
CiscoIos12.4\(22\)mda1
CiscoIos12.4\(22\)mda2
CiscoIos12.4\(22\)mda3
CiscoIos12.4\(22\)mda4
CiscoIos12.4\(22\)mda5
CiscoIos12.4\(22\)mda6
CiscoIos12.4\(22\)t
CiscoIos12.4\(22\)t1
CiscoIos12.4\(22\)t2
CiscoIos12.4\(22\)t3
CiscoIos12.4\(22\)t4
CiscoIos12.4\(22\)t5
CiscoIos12.4\(22\)xr1
CiscoIos12.4\(22\)xr2
CiscoIos12.4\(22\)xr3
CiscoIos12.4\(22\)xr4
CiscoIos12.4\(22\)xr5
CiscoIos12.4\(22\)xr6
CiscoIos12.4\(22\)xr7
CiscoIos12.4\(22\)xr8
CiscoIos12.4\(22\)xr9
CiscoIos12.4\(22\)xr10
CiscoIos12.4\(22\)xr11
CiscoIos12.4\(22\)xr12
CiscoIos12.4\(24\)md
CiscoIos12.4\(24\)md1
CiscoIos12.4\(24\)md2
CiscoIos12.4\(24\)md3
CiscoIos12.4\(24\)md4
CiscoIos12.4\(24\)md5
CiscoIos12.4\(24\)md6
CiscoIos12.4\(24\)md7
CiscoIos12.4\(24\)mda1
CiscoIos12.4\(24\)mda2
CiscoIos12.4\(24\)mda3
CiscoIos12.4\(24\)mda4
CiscoIos12.4\(24\)mda5
CiscoIos12.4\(24\)mda6
CiscoIos12.4\(24\)mda7
CiscoIos12.4\(24\)mda8
CiscoIos12.4\(24\)mda9
CiscoIos12.4\(24\)mda10
CiscoIos12.4\(24\)mda11
CiscoIos12.4\(24\)mda12
CiscoIos12.4\(24\)mda13
CiscoIos12.4\(24\)mdb

Showing 50 of 1012 affected configurations. See NVD for the full list.

References

Timeline

Published
Last Modified
Status
Analyzed

Frequently Asked Questions

What is CVE-2024-20308?
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 underflow, 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 denial of service (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-2024-20308?
CVE-2024-20308 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.80% probability of exploitation in the next 30 days.
How do I fix CVE-2024-20308?
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-2024-20308?

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

Scan your code now

Source: NVD / NIST