CVE-2021-22959: Medium severity ibm cognos controller vulnerability
An HTTP Request Smuggling (HRS) vulnerability was found in the llhttp library, used by Node.JS. Spaces as part of the header names were accepted as valid. In situations where HTTP conversations are being proxied (such as proxy, reverse-proxy, load-balancer), an attacker can use this flaw to inject arbitrary messages through the proxy. The highest threat from this vulnerability is to confidentiality and integrity.
Other sources
FasterXML jackson-databind is vulnerable to a denial of service, caused by an error when using JDK serialization to serialize and deserialize JsonNode values. By sending a specially crafted request, an attacker could exploit this vulnerability to cause a denial of service.
— IBM
The http parser accepts requests with a space (SP) right after the header name before the colon. This can lead to HTTP Request Smuggling (HRS).
The fix for this is included in llhttp v2.1.4 and v6.0.6.
Impacts:
All versions of the 16.x, 14.x, and 12.x releases lines.
— Red Hat
The parser in accepts requests with a space (SP) right after the header name before the colon. This can lead to HTTP Request Smuggling (HRS) in llhttp < v2.1.4 and < v6.0.6.
Affected Software
Remediation
Patch Available
Event History
Parent advisories
This vulnerability appears in the following advisories.
Frequently Asked Questions
What is CVE-2021-22959?
CVE-2021-22959 is an HTTP Request Smuggling vulnerability found in the llhttp library, used by Node.JS.
How does CVE-2021-22959 impact HTTP conversations?
CVE-2021-22959 allows an attacker to inject malicious content into HTTP conversations that are being proxied, such as proxy, reverse-proxy, or load-balancer.
Which versions of Node.JS are affected by CVE-2021-22959?
The affected versions of Node.JS include rh-nodejs14-nodejs, rh-nodejs14-nodejs-nodemon, rh-nodejs12-nodejs, node (v12.22.7), and node (v14.18.1).
What is the severity of CVE-2021-22959?
The severity of CVE-2021-22959 is medium, with a CVSS score of 6.1.
How can I fix CVE-2021-22959?
To fix CVE-2021-22959, update the affected software packages to the specified versions provided by Red Hat.