GHSA-79f6-p65j-3m2m

**Product:** Mobile Security Framework (MobSF) **Version:** 4.3.0 **CWE-ID:** CWE-269: Improper Privilege Management **CVSS vector v.4.0:** 7.1 (AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N) **CVSS vector v.3.1:** 6.5 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N) **Description:** MobSF has a functionality of dividing users by roles. This functionality is not efficient, because any registered user can get API Token with all privileges. **Impact:** Information Disclosure **Vulnerable component:** Code output component (`/source_code`) **Exploitation conditions:** authorized user **Mitigation:** Remove token output in the returned js-script **Researcher:** Egor Filatov (Positive Technologies)

## Research

Researcher discovered zero-day vulnerability «Local Privilege Escalation» in Mobile Security Framework (MobSF). To reproduce the vulnerability follow the steps below.

• A user with minimal privileges is required, so the administrator must create a user account

<img width="215" alt="fig1" src="https://github.com/user-attachments/assets/43e02a50-bdd9-48d9-9194-73946fcc56d9" />

*Figure 1. Registration*

• Go to static analysis of any application

<img width="1207" alt="fig2" src="https://github.com/user-attachments/assets/9ed141a7-a667-4a96-81fd-d81127874104" /> *Figure 2. Static analysis*

• Go to the code review of the selected application and get a token with all privileges in the response

<img width="1400" alt="fig3" src="https://github.com/user-attachments/assets/bf8b704b-9067-4861-a7d3-05ec119d9a3f" /> *Figure 3. Token receiving*

• This token can be used to retrieve dynamic analysis information that has not been accessed before.

 *Figure 4. No access demonstration*

<img width="1412" alt="fig5" src="https://github.com/user-attachments/assets/dc8f639f-36b0-47d3-807d-58ae551fcbfc" /> *Figure 5. Token usage*

As a result, the user is able to escalate the privileges.

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### Please, assign all credits to: Egor Filatov (Positive Technologies)