REDHAT-BUG-2516038: Medium severity Eclipse Undertow vulnerability
A flaw was found in Undertow, an HTTP server, within its HTTP response header writing path. The writeString() method performs a silent narrowing cast from 16-bit Unicode characters to 8-bit bytes when writing HTTP response header values. A remote attacker can exploit this by supplying specific Unicode characters in user-controlled input that an application places into response headers. This can lead to the truncation of these characters into ASCII control characters or special symbols, potentially resulting in limited integrity impact or information disclosure if the application does not properly sanitize user input.
Affected Software
Event History
Frequently Asked Questions
What is the severity of REDHAT-BUG-2516038?
The severity of REDHAT-BUG-2516038 is medium with a score of 4.
How does the vulnerability REDHAT-BUG-2516038 affect Eclipse Undertow?
REDHAT-BUG-2516038 affects Eclipse Undertow by allowing a remote attacker to exploit a flaw in the HTTP response header writing process.
What potential impact does REDHAT-BUG-2516038 have on applications using Eclipse Undertow?
The potential impact of REDHAT-BUG-2516038 includes the possibility of header injection due to improper handling of Unicode characters.
How can I mitigate the risks associated with REDHAT-BUG-2516038?
Mitigation for REDHAT-BUG-2516038 involves updating to the latest version of Eclipse Undertow that addresses this vulnerability.
Is it safe to use versions of Eclipse Undertow that are prior to the patch for REDHAT-BUG-2516038?
It is not safe to use versions prior to the patch for REDHAT-BUG-2516038 due to the identified vulnerabilities.