CVE-2021-1285 Multiple Cisco Products SNORT Ethernet Frame Decoder Denial of Service Vulnerability
An unauthenticated adjacent attacker can cause a denial of service by exhausting disk space via malicious Ethernet frames in Cisco Snort.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-1285?
CVE-2021-1285 is a high-severity denial of service vulnerability in Cisco UTD SNORT IPS Engine Software, published on 18 Nov 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Multiple Cisco products are affected by a vulnerability in the Ethernet Frame Decoder of the Snort detection engine that could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition. The vulnerability is due to improper handling of error conditions when processing Ethernet frames. An attacker could exploit this vulnerability by sending malicious Ethernet frames through an affected device. A successful exploit could allow the attacker to exhaust disk space on the affected device, which could result in administrators being unable to log in to the device or the device being unable to boot up correctly.Note: Manual intervention is required to recover from this situation. Customers are advised to contact the Cisco Technical Assistance Center (TAC) to help recover a device in this condition.Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
Weakness: CWE-770
Which versions are affected by CVE-2021-1285?
How do I fix CVE-2021-1285?
No fix has been published for CVE-2021-1285 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-2021-1285 being exploited?
There is no known exploitation of CVE-2021-1285 in the wild and no public exploit code.
Sources
Also known as GHSA-278j-256r-v8r4.