Vulnerability · Published Aug 17, 2020 · Assigned by cisco

CVE-2020-3500Cisco StarOS IPv6 Denial of Service Vulnerability

Medium 6.8

In plain English

A medium-severity memory corruption in Cisco ASR 5000 Series 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 1.6% (higher than 76% of all known vulnerabilities).

Severity (CVSS 3.1)6.8Medium

Exploit odds (30 days)1.6%top 23.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Cisco	Cisco ASR 5000 Series Software	n/a

Weakness: CWE-119 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H

References

20200805 Cisco StarOS IPv6 Denial of Service Vulnerability vendor-advisory, x_refsource_CISCO