Vulnerability · Published Jan 20, 2021 · Assigned by cisco

CVE-2021-1312Cisco Elastic Services Controller Denial of Service Vulnerability

Medium 5.3

In plain English

A medium-severity uncontrolled resource consumption in Cisco Elastic Services Controller from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.6% (higher than 85% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)2.6%top 14.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

A vulnerability in the system resource management of Cisco Elastic Services Controller (ESC) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) to the health monitor API on an affected device. The vulnerability is due to inadequate provisioning of kernel parameters for the maximum number of TCP connections and SYN backlog. An attacker could exploit this vulnerability by sending a flood of crafted TCP packets to an affected device. A successful exploit could allow the attacker to block TCP listening ports that are used by the health monitor API. This vulnerability only affects customers who use the health monitor API.

Affected products (as reported)

Vendor	Product	Versions
Cisco	Cisco Elastic Services Controller	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

20210120 Cisco Elastic Services Controller Denial of Service Vulnerability vendor-advisory, x_refsource_CISCO