Vulnerability · Published May 6, 2020 · Assigned by cisco

CVE-2020-3246Cisco Umbrella Carriage Return Line Feed Injection Vulnerability

Medium 4.7

In plain English

A medium-severity security flaw in Cisco Umbrella from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 60% of all known vulnerabilities).

Severity (CVSS 3.0)4.7Medium

Exploit odds (30 days)0.9%top 40.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

A vulnerability in the web server of Cisco Umbrella could allow an unauthenticated, remote attacker to perform a carriage return line feed (CRLF) injection attack against a user of an affected service. The vulnerability is due to insufficient validation of user input. An attacker could exploit this vulnerability by persuading a user to access a crafted URL. A successful exploit could allow the attacker to inject arbitrary HTTP headers into valid HTTP responses sent to the browser of the user.

Affected products (as reported)

Vendor	Product	Versions
Cisco	Cisco Umbrella	n/a

Weakness: CWE-93 · Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N

References

20200506 Cisco Umbrella Carriage Return Line Feed Injection Vulnerability vendor-advisory, x_refsource_CISCO