Bug#1059055: undertow: CVE-2023-5379

[Moritz Mühlenhoff]

Source: undertow
X-Debbugs-CC: team at security.debian.org
Severity: important
Tags: security

Hi,

The following vulnerability was published for undertow.

CVE-2023-5379[0]:
| A flaw was found in Undertow. When an AJP request is sent that
| exceeds the max-header-size attribute in ajp-listener, JBoss EAP is
| marked in an error state by mod_cluster in httpd, causing JBoss EAP
| to close the TCP connection without returning an AJP response. This
| happens because mod_proxy_cluster marks the JBoss EAP instance as an
| error worker when the TCP connection is closed from the backend
| after sending the AJP request without receiving an AJP response, and
| stops forwarding. This issue could allow a malicious user could to
| repeatedly send requests that exceed the max-header-size, causing a
| Denial of Service (DoS).

Only reference is https://bugzilla.redhat.com/show_bug.cgi?id=2242099
so far.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2023-5379
    https://www.cve.org/CVERecord?id=CVE-2023-5379

Please adjust the affected versions in the BTS as needed.