CVE-2024-20308 Memory corruption in Cisco IOS XE Software

High 8.6 Published 27 Mar 2024 Updated 26 Nov 2024

Unauthenticated remote attackers can cause a heap underflow and device reload via crafted IKEv1 packets, resulting in denial of service.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2024-20308?

CVE-2024-20308 is a high-severity memory corruption vulnerability in Cisco Ios, published on 27 Mar 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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..

Weakness: CWE-787

Which versions are affected by CVE-2024-20308?

It affects 2 products.

Products include Cisco Ios, Cisco Ios Xe.

How do I fix CVE-2024-20308?

No fix has been published for CVE-2024-20308 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2024-20308 being exploited?

There is no known exploitation of CVE-2024-20308 in the wild and no public exploit code.

All Cisco Ios vulnerabilities

Sources

Also known as GHSA-6vwv-6hmx-54hh.