CVE Vulnerabilities

CVE-2019-12746

Exposure of Sensitive Information to an Unauthorized Actor

Published: Aug 21, 2019 | Modified: Aug 31, 2023
CVSS 3.x
6.5
MEDIUM
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
CVSS 2.x
4.3 MEDIUM
AV:N/AC:M/Au:N/C:P/I:N/A:N
RedHat/V2
RedHat/V3
Ubuntu
MEDIUM

An issue was discovered in Open Ticket Request System (OTRS) Community Edition 5.0.x through 5.0.36 and 6.0.x through 6.0.19. A user logged into OTRS as an agent might unknowingly disclose their session ID by sharing the link of an embedded ticket article with third parties. This identifier can be then be potentially abused in order to impersonate the agent user.

Weakness

The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

Affected Software

Name Vendor Start Version End Version
Otrs Otrs 5.0.0 (including) 5.0.36 (including)
Otrs Otrs 6.0.0 (including) 6.0.19 (including)
Otrs2 Ubuntu bionic *
Otrs2 Ubuntu cosmic *
Otrs2 Ubuntu disco *
Otrs2 Ubuntu eoan *
Otrs2 Ubuntu esm-apps/bionic *
Otrs2 Ubuntu esm-apps/xenial *
Otrs2 Ubuntu focal *
Otrs2 Ubuntu groovy *
Otrs2 Ubuntu hirsute *
Otrs2 Ubuntu impish *
Otrs2 Ubuntu jammy *
Otrs2 Ubuntu trusty *
Otrs2 Ubuntu upstream *
Otrs2 Ubuntu xenial *

Extended Description

There are many different kinds of mistakes that introduce information exposures. The severity of the error can range widely, depending on the context in which the product operates, the type of sensitive information that is revealed, and the benefits it may provide to an attacker. Some kinds of sensitive information include:

Information might be sensitive to different parties, each of which may have their own expectations for whether the information should be protected. These parties include:

Information exposures can occur in different ways:

It is common practice to describe any loss of confidentiality as an “information exposure,” but this can lead to overuse of CWE-200 in CWE mapping. From the CWE perspective, loss of confidentiality is a technical impact that can arise from dozens of different weaknesses, such as insecure file permissions or out-of-bounds read. CWE-200 and its lower-level descendants are intended to cover the mistakes that occur in behaviors that explicitly manage, store, transfer, or cleanse sensitive information.

Potential Mitigations

  • Compartmentalize the system to have “safe” areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area.
  • Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separation functionality. Architects and designers should rely on the principle of least privilege to decide the appropriate time to use privileges and the time to drop privileges.

References