Vulnerability · Published Oct 27, 2021 · Assigned by cisco
CVE-2021-40114Multiple Cisco Products Snort Memory Leak Denial of Service Vulnerability
Medium 6.8
In plain English
A medium-severity resource allocation without limits in Cisco Firepower Threat Defense Software from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.5% (higher than 85% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Multiple Cisco products are affected by a vulnerability in the way the Snort detection engine processes ICMP traffic that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper memory resource management while the Snort detection engine is processing ICMP packets. An attacker could exploit this vulnerability by sending a series of ICMP packets through an affected device. A successful exploit could allow the attacker to exhaust resources on the affected device, causing the device to reload.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | snort | 2.9.18-r0 | ALPINE-CVE-2021-40114 |
| Alpine:v3.21 | snort | 2.9.18-r0 | ALPINE-CVE-2021-40114 |
| Alpine:v3.22 | snort | 2.9.18-r0 | ALPINE-CVE-2021-40114 |
| Alpine:v3.23 | snort | 2.9.18-r0 | ALPINE-CVE-2021-40114 |
| Alpine:v3.24 | snort | 2.9.18-r0 | ALPINE-CVE-2021-40114 |
| Ubuntu:22.04:LTS | snort | no fix listed | UBUNTU-CVE-2021-40114 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Cisco Firepower Threat Defense Software | n/a |
Weakness: CWE-770 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
References
- 20211027 Multiple Cisco Products Snort Memory Leak Denial of Service Vulnerability vendor-advisory
- [debian-lts-announce] 20230210 [SECURITY] [DLA 3317-1] snort security update mailing-list
- DSA-5354 vendor-advisory