CVE-2021-1424 Cisco ASR 5000 Series Software (StarOS) ipsecmgr Process Denial of Service Vulnerability
Remote attackers can cause a denial of service by sending malformed IKEv2 packets to Cisco ASR 5000 devices, requiring software updates.
- 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-2021-1424?
CVE-2021-1424 is a medium-severity denial of service vulnerability in Cisco ASR 5000 Series Software, published on 18 Nov 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability in the ipsecmgr process of Cisco ASR 5000 Series Software (StarOS) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. This vulnerability is due to insufficient validation of incoming Internet Key Exchange Version 2 (IKEv2) packets. An attacker could exploit this vulnerability by sending specifically malformed IKEv2 packets to an affected device. A successful exploit could allow the attacker to cause the ipsecmgr process to restart, which would disrupt ongoing IKE negotiations and result in a temporary DoS condition.Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
Weakness: CWE-119
Which versions are affected by CVE-2021-1424?
How do I fix CVE-2021-1424?
No fix has been published for CVE-2021-1424 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2021-1424 being exploited?
There is no known exploitation of CVE-2021-1424 in the wild and no public exploit code.
Sources
Also known as GHSA-7q9w-6xw2-qfxq.