The AsteriskGUI HTTP server in Asterisk Open Source 1.4.x before 1.4.19-rc3 and 1.6.x before 1.6.0-beta6, Business Edition C.x.x before C.1.6, AsteriskNOW before 1.0.2, Appliance Developer Kit before revision 104704, and s800i 1.0.x before 1.1.0.2 generates insufficiently random manager ID values, which makes it easier for remote attackers to hijack a manager session via a series of ID guesses.
https://www.redhat.com/archives/fedora-package-announce/2008-March/msg00514.html
https://www.redhat.com/archives/fedora-package-announce/2008-March/msg00438.html
https://exchange.xforce.ibmcloud.com/vulnerabilities/41304
http://www.securitytracker.com/id?1019679
http://www.securityfocus.com/bid/28316
http://www.securityfocus.com/archive/1/489819/100/0/threaded
http://securityreason.com/securityalert/3764
http://secunia.com/advisories/29470