What is CVE-2020-3338?

CVE-2020-3338 is a high-severity vulnerability in Cisco Nx-Os Software 5.2(1), classified under Improper Resource Shutdown or Release. CVSS score: 7.5/10. Published 2020-08-27.

How severe is CVE-2020-3338?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Cisco Nx-Os Software 5.2(1)

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) 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.

EPSS: 0.018 (76.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Weakness classification (CWE)

References

psirt@cisco.com (x_refsource_CISCO, vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2020-3338?: CVE-2020-3338 is a high-severity vulnerability in Cisco Nx-Os Software 5.2(1), classified under Improper Resource Shutdown or Release. CVSS score: 7.5/10. Published 2020-08-27.
How severe is CVE-2020-3338?: High severity. CVSS v3 base score is 7.5 out of 10.