CVE-2022-2048: High severity ibm cognos command center vulnerability
Description Invalid HTTP/2 requests (for example, invalid URIs) are incorrectly handled by writing a blocking error response directly from the selector thread. If the client manages to exhaust the HTTP/2 flow control window, or TCP congest the connection, the selector thread will be blocked trying to write the error response. If this is repeated for all the selector threads, the server becomes unresponsive, causing the denial of service.
Impact A malicious client may render the server unresponsive.
Patches The fix is available in Jetty versions 9.4.47. 10.0.10, 11.0.10.
Workarounds No workaround available within Jetty itself. One possible workaround is to filter the requests before sending them to Jetty (for example in a proxy)
For more information If you have any questions or comments about this advisory: Email us at security@webtide.com.
Other sources
A flaw was found in the Eclipse Jetty http2-server package. This flaw allows an attacker to cause a denial of service in the server via HTTP/2 requests.
Eclipse Jetty is vulnerable to a denial of service, caused by a flaw in the error handling of an invalid HTTP/2 request. By sending specially-crafted HTTP/2 requests, a remote attacker could exploit this vulnerability to cause the server to become unresponsive, and results in a denial of service condition.
— IBM
In Eclipse Jetty HTTP/2 server implementation, when encountering an invalid HTTP/2 request, the error handling has a bug that can wind up not properly cleaning up the active connections and associated resources. This can lead to a Denial of Service scenario where there are no enough resources left to process good requests.
— Red Hat
Affected Software
Event History
Parent advisories
This vulnerability appears in the following advisories.
Frequently Asked Questions
What is CVE-2022-2048?
CVE-2022-2048 is a vulnerability in the Eclipse Jetty http2-server package that allows an attacker to cause a denial-of-service.
How does CVE-2022-2048 impact systems?
CVE-2022-2048 can lead to a denial-of-service attack if the client exhausts the HTTP/2 flow control window or congests the connection.
Which software is affected by CVE-2022-2048?
The affected software includes org.eclipse.jetty.http2:http2-server versions up to 11.0.10, 10.0.10, and 9.4.47.
What is the severity of CVE-2022-2048?
CVE-2022-2048 has a severity rating of high (7.5).
Where can I find more information about CVE-2022-2048?
You can find more information about CVE-2022-2048 at the following references: [GitHub Advisory](https://github.com/eclipse/jetty.project/security/advisories/GHSA-wgmr-mf83-7x4j), [NVD](https://nvd.nist.gov/vuln/detail/CVE-2022-2048), [Debian Security Advisory](https://www.debian.org/security/2022/dsa-5198).