CVE-2020-3500

MEDIUM

Cisco StarOS < 21.18.3 - Unauthenticated Denial of Service via IPv6 Packet Processing

Title source: llm
STIX 2.1

Description

A vulnerability in the IPv6 implementation of Cisco StarOS could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to insufficient validation of incoming IPv6 traffic. An attacker could exploit this vulnerability by sending a crafted IPv6 packet to an affected device with the goal of reaching the vulnerable section of the input buffer. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition. This vulnerability is specific to IPv6 traffic. IPv4 traffic is not affected.

References (1)

Core 1
Core References

Scores

CVSS v3 6.8
EPSS 0.0029
EPSS Percentile 52.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-119
Status published
Products (1)
cisco/staros < 21.18.3
Published Aug 17, 2020
Tracked Since Feb 18, 2026