CVE & CISA-KEV Catalog

CVE-2021-40114

MEDIUMEPSS 82th pctl
6.8
CVSS v3
NVD

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.

CWE-770Allocation of Resources Without Limits or ThrottlingCWE-401Missing Release of Memory (Memory Leak)

How to fix

Remediation Available
firepower threat defenseNVD
Affected:>= 6.7.0, < 6.7.0.2Fixed in:6.7.0.2CVE-2021-40114derived from NVD
snortNVD
Affected:>= 2.0.0, < 2.9.18Fixed in:2.9.18CVE-2021-40114derived from NVD
unified threat defenseNVD
Affected:>= 17.4, < 17.4.2Fixed in:17.4.2CVE-2021-40114derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityHigh
Privileges RequiredNone
User InteractionNone
ScopeChanged

Impact

ConfidentialityNone
IntegrityNone
AvailabilityHigh

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H

Exploit Intelligence

2.37%probability of exploitation in 30 days
82ndpercentile

Elevated risk: more likely to be exploited than 82% of all known CVEs.

References

Vendor Advisory1
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Markdown

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HTML

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-26.