Buffer overflow in Cisco iOS Xe Software
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..
Vulnerability class: Buffer Overflow
EPSS: 0.008 (53.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.
Affected products
- Cisco Ios Xe Software — versions 3.7.0S, 3.7.1S, 3.7.2S
- Cisco Ios — versions 15.2\(4\)ea6, 15.6\(2\)sp7, 12.4\(24\)yg4
- Cisco Ios_xe — versions 3.3.0sg, 3.3.1sg, 3.3.2sg
Weakness classification (CWE)
References
- psirt@cisco.com (Vendor Advisory)
Frequently asked questions
- What is CVE-2024-20308?
- CVE-2024-20308 is a high-severity vulnerability in Cisco iOS Xe Software, classified under Out-of-bounds Write. CVSS score: 8.6/10. Published 2024-03-27.
- How severe is CVE-2024-20308?
- High severity. CVSS v3 base score is 8.6 out of 10.