Vulnerability · Published Jan 20, 2021 · Assigned by cisco

CVE-2021-1353Cisco StarOS IPv4 Denial of Service Vulnerability

Medium 5.8

In plain English

A medium-severity memory leak 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 1.3% (higher than 71% of all known vulnerabilities).

Severity (CVSS 3.1)5.8Medium

Exploit odds (30 days)1.3%top 29.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

A vulnerability in the IPv4 protocol handling 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 a memory leak that occurs during packet processing. An attacker could exploit this vulnerability by sending a series of crafted IPv4 packets through an affected device. A successful exploit could allow the attacker to exhaust the available memory and cause an unexpected restart of the npusim process, leading to a DoS condition on the affected device.

Affected products (as reported)

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

Weakness: CWE-401 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L

References

20210120 Cisco StarOS IPv4 Denial of Service Vulnerability vendor-advisory, x_refsource_CISCO