oFono 2.3 SimToolKit heap-based overflow

Summaryinfo

A vulnerability, which was classified as critical, has been found in oFono 2.3. This issue affects some unknown processing of the component SimToolKit. This manipulation causes heap-based overflow. This vulnerability appears as CVE-2024-7546. The attack requires local access. There is no available exploit.

Detailsinfo

A vulnerability classified as critical was found in oFono 2.3. Affected by this vulnerability is an unknown functionality of the component SimToolKit. The manipulation with an unknown input leads to a heap-based overflow vulnerability. The CWE definition for the vulnerability is CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

oFono SimToolKit Heap-based Buffer Overflow Privilege Escalation Vulnerability. This vulnerability allows local attackers to execute arbitrary code on affected installations of oFono. An attacker must first obtain the ability to execute code on the target modem in order to exploit this vulnerability. The specific flaw exists within the parsing of STK command PDUs. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the service account. Was ZDI-CAN-23459.

The advisory is shared at zerodayinitiative.com. This vulnerability is known as CVE-2024-7546 since 08/06/2024. The exploitation appears to be easy. An attack has to be approached locally. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 04/18/2026).

The vulnerability scanner Nessus provides a plugin with the ID 307010 (Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS : oFono vulnerabilities (USN-8178-1)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (307010). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

• oFono

Version

• 2.3

CPE 2.3info

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• 🔍

CPE 2.2info

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• 🔍

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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