FreeBSD VuXML: Documenting security issues in FreeBSD and the FreeBSD Ports Collection

xinetd -- attackers can bypass access restrictions if tcpmux-servers service enabled

Affected packages
xinetd < 2.3.15


VuXML ID e11955ca-187c-11e2-be36-00215af774f0
Discovery 2012-02-15
Entry 2012-10-17

Thomas Swan reports:

xinetd allows for services to be configured with the TCPMUX or TCPMUXPLUS service types, which makes those services available on port 1, as per RFC 1078 [1], if the tcpmux-server service is enabled. When the tcpmux-server service is enabled, xinetd would expose _all_ enabled services via the tcpmux port, instead of just the configured service(s). This could allow a remote attacker to bypass firewall restrictions and access services via the tcpmux port.


CVE Name CVE-2012-0862