Vulnerability · Published Feb 17, 2021 · Assigned by cisco

CVE-2021-1378Cisco StarOS Denial of Service Vulnerability

Medium 5.3

In plain English

A medium-severity uncontrolled resource consumption 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 1.5% (higher than 74% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)1.5%top 25.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

A vulnerability in the SSH service of the Cisco StarOS operating system could allow an unauthenticated, remote attacker to cause an affected device to stop processing traffic, resulting in a denial of service (DoS) condition. The vulnerability is due to a logic error that may occur under specific traffic conditions. An attacker could exploit this vulnerability by sending a series of crafted packets to an affected device. A successful exploit could allow the attacker to prevent the targeted service from receiving any traffic, which would lead 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-400 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References

20210217 Cisco StarOS Denial of Service Vulnerability vendor-advisory, x_refsource_CISCO