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HIGH · 7.5

CVE-2020-3338

A vulnerability in the Protocol Independent Multicast (PIM) feature for IPv6 networks (PIM6) of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) ...

Vulnerability Description

A vulnerability in the Protocol Independent Multicast (PIM) feature for IPv6 networks (PIM6) of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper error handling when processing inbound PIM6 packets. An attacker could exploit this vulnerability by sending multiple crafted PIM6 packets to an affected device. A successful exploit could allow the attacker to cause the PIM6 application to leak system memory. Over time, this memory leak could cause the PIM6 application to stop processing legitimate PIM6 traffic, leading to a DoS condition on the affected device.

CVSS Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH

Affected Products

VendorProductVersions
CiscoNx-Os-
CiscoNexus 3016-
CiscoNexus 3048-
CiscoNexus 3064-
CiscoNexus 3064-T-
CiscoNexus 31108Pc-V-
CiscoNexus 31108Tc-V-
CiscoNexus 31128Pq-
CiscoNexus 3132C-Z-
CiscoNexus 3132Q-
CiscoNexus 3132Q-V-
CiscoNexus 3132Q-Xl-
CiscoNexus 3164Q-
CiscoNexus 3172-
CiscoNexus 3172Pq-Xl-
CiscoNexus 3172Tq-
CiscoNexus 3172Tq-32T-
CiscoNexus 3172Tq-Xl-
CiscoNexus 3232C-
CiscoNexus 3264C-E-

Related Weaknesses (CWE)

CWE-404CWE-755

References

FAQ

What is CVE-2020-3338?

CVE-2020-3338 is a vulnerability with a CVSS score of 7.5 (HIGH). A vulnerability in the Protocol Independent Multicast (PIM) feature for IPv6 networks (PIM6) of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) ...

How severe is CVE-2020-3338?

CVE-2020-3338 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2020-3338?

Check the references section above for vendor advisories and patch information. Affected products include: Cisco Nx-Os, Cisco Nexus 3016, Cisco Nexus 3048, Cisco Nexus 3064, Cisco Nexus 3064-T.