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The latest manufacturer recommendations regarding updates, workarounds and security patches for this vulnerability can be found here: Mitel Product Security Advisory (As of April 17, 2024). Other useful links are listed later in this article.

Multiple vulnerabilities reported for Mitel SIP Phone – Risk: high

Risk level: 4 (high)
CVSS Base Score: 9,8
CVSS Temporal Score: 8,5
Remoteangriff: Ja

The Common Vulnerability Scoring System (CVSS) is used to assess the severity of security vulnerabilities in computer systems. The CVSS standard makes it possible to compare potential or actual security vulnerabilities based on various criteria in order to better prioritize countermeasures. The attributes “none”, “low”, “medium”, “high” and “critical” are used to determine the severity levels of a vulnerability. The Base Score evaluates the requirements for an attack (including authentication, complexity, privileges, user interaction) and its consequences. With the temporal score, framework conditions that can change over time are taken into account in the evaluation. According to the CVSS, the risk of the current vulnerability is classified as “high” with a base score of 9.8.

Mitel SIP Phone Bug: Summary of reported vulnerabilities

Mitel SIP Phone refers to landline desk phones.

A remote, anonymous attacker could exploit multiple vulnerabilities in Mitel SIP Phone to execute arbitrary code, cause a denial of service, or disclose sensitive information.

The vulnerabilities were classified using the CVE designation system (Common Vulnerabilities and Exposures) by their individual serial numbers CVE-2024-31963, CVE-2024-31964, CVE-2024-31965, CVE-2024-31966 und CVE-2024-31967.

Systems affected by the security gap at a glance

operating system

Mitel SIP Phone Mitel SIP Phone Mitel SIP Phone

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General recommendations for dealing with IT security gaps

Users of the affected applications should keep them up to date. When security gaps become known, manufacturers are required to fix them as quickly as possible by developing a patch or a workaround. If security patches are available, install them promptly. For information, consult the sources listed in the next section. These often contain further information about the latest version of the software in question as well as the availability of security patches or information about workarounds. If you have any further questions or uncertainties, please contact your responsible administrator. IT security managers should regularly check the sources mentioned to see whether a new security update is available.

Manufacturer information on updates, patches and workarounds

Here you will find further links with information about bug reports, security fixes and workarounds.

Mitel Product Security Advisory vom 2024-04-17 (17.04.2024)
For more information, see:

Mitel Product Security Advisory vom 2024-04-17 (17.04.2024)
For more information, see:

Mitel Product Security Advisory vom 2024-04-17 (17.04.2024)
For more information, see:

Mitel Product Security Advisory vom 2024-04-17 (17.04.2024)
For more information, see:

Mitel Product Security Advisory vom 2024-04-17 (17.04.2024)
For more information, see:

Version history of this security alert

This is the initial version of this IT security notice for Mitel SIP Phone. This text will be updated as updates are announced. You can read about changes or additions in this version history.

April 17, 2024 – Initial version

+++ Editorial note: This text was generated based on current BSI data and will be updated in a data-driven manner depending on the warning situation. We accept feedback and comments at [email protected]. +++

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