Lighttpd must protect against or limit the effects of HTTP types of Denial of Service (DoS) attacks.

From VMware vRealize Automation 7.x Lighttpd Security Technical Implementation Guide

Associated with: CCI-001094

SV-99939r1_rule Lighttpd must protect against or limit the effects of HTTP types of Denial of Service (DoS) attacks.

Vulnerability discussion

In UNIX and related computer operating systems, a file descriptor is an indicator used to access a file or other input/output resource, such as a pipe or network connection. File descriptors index into a per-process file descriptor table maintained by the kernel, that in turn indexes into a system-wide table of files opened by all processes, called the file table.As a single-threaded server, Lighttpd must be limited in the number of file descriptors that can be allocated. This will prevent Lighttpd from being used in a form of DoS attack against the Operating System.

Check content

At the command prompt, execute the following command: grep '^server.max-fds' /opt/vmware/etc/lighttpd/lighttpd.conf If the value for "server.max-fds" is not set to "2048", this is a finding.

Fix text

Navigate to and open /opt/vmware/etc/lighttpd/lighttpd.conf Configure the "lighttpd.conf" file with the following: server.max-fds = 2048

Pro Tips

Lavender hyperlinks in small type off to the right (of CSS class id, if you view the page source) point to globally unique URIs for each document and item. Copy the link location and paste anywhere you need to talk unambiguously about these things.

You can obtain data about documents and items in other formats. Simply provide an HTTP header Accept: text/turtle or Accept: application/rdf+xml.