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Vulnerability of OTRS Help Desk: unexpired session via SessionMaxIdleTime Ignored

Synthesis of the vulnerability 

Background tasks are counted for SessionMaxIdleTime of OTRS Help Desk, so an attacker can ensure that his session will never expire.
Vulnerable systems: OTRS Help Desk.
Severity of this threat: 1/4.
Creation date: 07/02/2020.
Références of this weakness: CVE-2020-1768, VIGILANCE-VUL-31544.

Description of the vulnerability 

Background tasks are counted for SessionMaxIdleTime of OTRS Help Desk, so an attacker can ensure that his session will never expire.
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This cybersecurity weakness impacts software or systems such as OTRS Help Desk.

Our Vigil@nce team determined that the severity of this security vulnerability is low.

The trust level is of type confirmed by the editor, with an origin of user account.

An attacker with a expert ability can exploit this vulnerability bulletin.

Solutions for this threat 

OTRS Help Desk: version 7.0.15.
The version 7.0.15 is fixed:
  https://community.otrs.com/download/
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