6.8
Medium
CVE-2024-20307 A vulnerability in the IKEv1 fragmentation code of Cisco IOS Software and Cisco IOS XE Software could allow an…
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| IOS | Versions not published | |
| Cisco IOS XE Software 17.11 | 17.11.1a → 17.11.99SW | No fix stated |
| Cisco IOS XE Software 17.10 | 17.10.1a → 17.10.1 | No fix stated |
| Cisco IOS XE Software 17.9 | 17.9.1w → 17.9.3 | No fix stated |
| Cisco IOS XE Software 17.8 | 17.8.1a → 17.8.1 | No fix stated |
| Cisco IOS XE Software 17.7 | 17.7.1a → 17.7.2 | No fix stated |
| Cisco IOS XE Software 17.6 | 17.6.1w → 17.6.5 | No fix stated |
| Cisco IOS XE Software 17.5 | 17.5.1a → 17.5.1 | No fix stated |
| Cisco IOS XE Software 17.4 | 17.4.1a → 17.4.2 | No fix stated |
Show the 24 other branches Hide the 24 other branches
| Product | Affected versions | Fixed in |
|---|---|---|
| Cisco IOS XE Software 17.3 | 17.3.1w → 17.3.7 | No fix stated |
| Cisco IOS XE Software 17.2 | 17.2.1r → 17.2.3 | No fix stated |
| Cisco IOS XE Software 17.1 | 17.1.1s → 17.1.3 | No fix stated |
| Cisco IOS XE Software 16.12 | 16.12.1s → 16.12.9 | No fix stated |
| Cisco IOS XE Software 16.11 | 16.11.1s → 16.11.2 | No fix stated |
| Cisco IOS XE Software 16.10 | 16.10.1s → 16.10.3 | No fix stated |
| Cisco IOS XE Software 16.9 | 16.9.1s → 16.9.8 | No fix stated |
| Cisco IOS XE Software 16.8 | 16.8.1s → 16.8.3 | No fix stated |
| Cisco IOS XE Software 16.7 | 16.7.1a → 16.7.4 | No fix stated |
| Cisco IOS XE Software 16.6 | 16.6.1 → 16.6.10 | No fix stated |
| Cisco IOS XE Software 16.5 | 16.5.1a → 16.5.3 | No fix stated |
| Cisco IOS XE Software 16.4 | 16.4.1 → 16.4.3 | No fix stated |
| Cisco IOS XE Software 16.3 | 16.3.1a → 16.3.11 | No fix stated |
| Cisco IOS XE Software 16.2 | 16.2.1 → 16.2.2 | No fix stated |
| Cisco IOS XE Software | 16.1.3 | No fix stated |
| Cisco IOS XE Software 3.16 | 3.16.3S → 3.16.10S | No fix stated |
| Cisco IOS XE Software | 3.15.4S | No fix stated |
| Cisco IOS XE Software | 3.14.4S | No fix stated |
| Cisco IOS XE Software 3.13 | 3.13.6S → 3.13.10S | No fix stated |
| Cisco IOS XE Software 3.10 | 3.10.8S → 3.10.10S | No fix stated |
| Cisco IOS XE Software | 3.9.0E | No fix stated |
| Cisco IOS XE Software 3.8 | 3.8.2E → 3.8.10E | No fix stated |
| Cisco IOS XE Software 3.7 | 3.7.4E → 3.7.5E | No fix stated |
| Cisco IOS XE Software | 3.4.8SG | No fix stated |
References
- cisco-sa-ikev1-NO2ccFWz sec.cloudapps.cisco.com
Timeline
- Published
- Last modified
Other CVEs of IOS
The 39 CVEs of IOS →
CVE-2026-20301
A vulnerability in the Extensible Messaging Client Protocol (XMCP), also referred to as the External Client protocol, of…
8.6
High
CVE-2026-20125
A vulnerability in the HTTP Server feature of Cisco IOS Software and Cisco IOS XE Software Release 3E could allow an…
7.7
High
CVE-2026-20012
A vulnerability in the Internet Key Exchange version 2 (IKEv2) feature of Cisco IOS Software, Cisco IOS XE Software,…
8.6
High
CVE-2025-20363
A vulnerability in the web services of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software, Cisco Secure…
9.0
Critical