Vulnerability CVE-2017-18486
Published: 2019-08-09

Description:
Jitbit Helpdesk before 9.0.3 allows remote attackers to escalate privileges because of mishandling of the User/AutoLogin userHash parameter. By inspecting the token value provided in a password reset link, a user can leverage a weak PRNG to recover the shared secret used by the server for remote authentication. The shared secret can be used to escalate privileges by forging new tokens for any user. These tokens can be used to automatically log in as the affected user.

Type:

CWE-332

 (Insufficient Entropy in PRNG)

CVSS2 => (AV:N/AC:L/Au:S/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
6.5/10
6.4/10
8/10
Exploit range
Attack complexity
Authentication
Remote
Low
Single time
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Jitbit -> Helpdesk 

 References:
https://github.com/Kc57/JitBit_Helpdesk_Auth_Bypass
https://packetstormsecurity.com/files/144334/JitBit-Helpdesk-9.0.2-Broken-Authentication.html
https://www.exploit-db.com/exploits/42776
https://www.trustedsec.com/2017/09/full-disclosure-jitbit-helpdesk-authentication-bypass-0-day
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