CVE-2025-24804

Mobile Security Framework (MobSF) is an automated, all-in-one mobile application (Android/iOS/Windows) pen-testing, malware analysis and security assessment framework. According to Apple's documentation for bundle ID's, it must contain only alphanumeric characters (A–Z, a–z, and 0–9), hyphens (-), and periods (.). However, an attacker can manually modify this value in the `Info.plist` file and add special characters to the `<key>CFBundleIdentifier</key>` value. When the application parses the wrong characters in the bundle ID, it encounters an error. As a result, it will not display content and will throw a 500 error instead. The only way to make the pages work again is to manually remove the malicious application from the system. This issue has been addressed in version 4.3.1 and all users are advised to upgrade. There are no known workarounds for this vulnerability.

Mobile Security Framework (MobSF) is an automated, all-in-one mobile application (Android/iOS/Windows) pen-testing, malware analysis and security assessment framework. According to Apple's documentation for bundle ID's, it must contain only alphanumeric characters (A–Z, a–z, and 0–9), hyphens (-), and periods (.). However, an attacker can manually modify this value in the `Info.plist` file and add special characters to the `<key>CFBundleIdentifier</key>` value. When the application parses the wrong characters in the bundle ID, it encounters an error. As a result, it will not display content and will throw a 500 error instead. The only way to make the pages work again is to manually remove the malicious application from the system. This issue has been addressed in version 4.3.1 and all users are advised to upgrade. There are no known workarounds for this vulnerability.

# Partial Denial of Service (DoS) **Product:** MobSF **Version:** v4.2.9 **CWE-ID:** CWE-1287: Improper Validation of Specified Type of Input **CVSS vector v.4.0:** 6.9 (AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N) **CVSS vector v.3.1:** 6.5 (AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H) **Description:** DoS in the Scans Results and iOS Dynamic Analyzer functionality **Impact:** Leveraging this vulnerability would make Scans Results and iOS Dynamic Analyzer pages unavailable. **Vulnerable component:** urls.py https://github.com/MobSF/Mobile-Security-Framework-MobSF/blob/d1d3b7a9aeb1a8c8c7c229a3455b19ade9fa8fe0/mobsf/MobSF/urls.py#L401 **Exploitation conditions:** A malicious application was uploaded to the MobSF. **Mitigation:** Check the uploaded bundle IDs against the regex. **Researcher: Oleg Surnin (Positive Technologies)** ## Research Researcher discovered zero-day vulnerability Partial Denial of Service (DoS) in MobSF in the Scans Results and iOS Dynamic Analyzer functionality. According to Apple's documentation for bundle ID's, it must contain only alphanumeric characters (A–Z, a–z, and 0–9), hyphens (-), and periods (.). (https://developer.apple.com/documentation/bundleresources/information-property-list/cfbundleidentifier) However, an attacker can manually modify this value in `Info.plist` file and add special characters to the `<key>CFBundleIdentifier</key>` value. In the `urls.py` file URL rules are defined. https://github.com/MobSF/Mobile-Security-Framework-MobSF/blob/d1d3b7a9aeb1a8c8c7c229a3455b19ade9fa8fe0/mobsf/MobSF/urls.py#L401 *Listing 3.* ``` bundle_id_regex = r'(?P<bundle_id>([a-zA-Z0-9]{1}[\w.-]{1,255}))$' # skip code re_path(fr'^ios/view_report/{bundle_id_regex}', ios_view_report.ç, name='ios_view_report'), ``` When the application parses the wrong characters in the bundle ID, it encounters an error. As a result, it will not display content and will throw a 500 error instead. The only way to make the pages work again is to manually remove the malicious application from the system. ## Vulnerability reproduction To reproduce the vulnerability, follow the steps described below. • Unzip the IPA file of any iOS application. *Listing 4. Unzipping the file* ``` unzip test.ipa ``` • Modify the value of `<key>CFBundleIdentifier</key>` by adding restricted characters in the `Info.plist` file. <img width="364" alt="image-6" src="https://github.com/user-attachments/assets/97dce68a-a5e2-4048-b5c8-3090146a9635" /> *Figure 7. Example with `'` character` • Zip the modified IPA file. *Listing 5. Zipping the file* ``` zip -r dos.ipa Payload/ ``` • Upload the modified IPA file to Static Analysis and wait until it finished • Open the following pages: `http://mobsf/recent_scans/` `http://mobsf/ios/dynamic_analysis/` <img width="1119" alt="image-7" src="https://github.com/user-attachments/assets/a7a9ae2e-cd84-4ec8-8132-25140a209ca0" /> *Figure 8. DoS Example* <img width="1141" alt="image-8" src="https://github.com/user-attachments/assets/a76e03ae-b4c6-4003-a145-c1fa4c88a7a5" /> *Figure 9. DoS Example* _________________ ### Please, assign all credits to Oleg Surnin (Positive Technologies)

# Partial Denial of Service (DoS) **Product:** MobSF **Version:** v4.2.9 **CWE-ID:** CWE-1287: Improper Validation of Specified Type of Input **CVSS vector v.4.0:** 6.9 (AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N) **CVSS vector v.3.1:** 6.5 (AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H) **Description:** DoS in the Scans Results and iOS Dynamic Analyzer functionality **Impact:** Leveraging this vulnerability would make Scans Results and iOS Dynamic Analyzer pages unavailable. **Vulnerable component:** urls.py https://github.com/MobSF/Mobile-Security-Framework-MobSF/blob/d1d3b7a9aeb1a8c8c7c229a3455b19ade9fa8fe0/mobsf/MobSF/urls.py#L401 **Exploitation conditions:** A malicious application was uploaded to the MobSF. **Mitigation:** Check the uploaded bundle IDs against the regex. **Researcher: Oleg Surnin (Positive Technologies)** ## Research Researcher discovered zero-day vulnerability Partial Denial of Service (DoS) in MobSF in the Scans Results and iOS Dynamic Analyzer functionality. According to Apple's documentation for bundle ID's, it must contain only alphanumeric characters (A–Z, a–z, and 0–9), hyphens (-), and periods (.). (https://developer.apple.com/documentation/bundleresources/information-property-list/cfbundleidentifier) However, an attacker can manually modify this value in `Info.plist` file and add special characters to the `<key>CFBundleIdentifier</key>` value. In the `urls.py` file URL rules are defined. https://github.com/MobSF/Mobile-Security-Framework-MobSF/blob/d1d3b7a9aeb1a8c8c7c229a3455b19ade9fa8fe0/mobsf/MobSF/urls.py#L401 *Listing 3.* ``` bundle_id_regex = r'(?P<bundle_id>([a-zA-Z0-9]{1}[\w.-]{1,255}))$' # skip code re_path(fr'^ios/view_report/{bundle_id_regex}', ios_view_report.ç, name='ios_view_report'), ``` When the application parses the wrong characters in the bundle ID, it encounters an error. As a result, it will not display content and will throw a 500 error instead. The only way to make the pages work again is to manually remove the malicious application from the system. ## Vulnerability reproduction To reproduce the vulnerability, follow the steps described below. • Unzip the IPA file of any iOS application. *Listing 4. Unzipping the file* ``` unzip test.ipa ``` • Modify the value of `<key>CFBundleIdentifier</key>` by adding restricted characters in the `Info.plist` file. <img width="364" alt="image-6" src="https://github.com/user-attachments/assets/97dce68a-a5e2-4048-b5c8-3090146a9635" /> *Figure 7. Example with `'` character` • Zip the modified IPA file. *Listing 5. Zipping the file* ``` zip -r dos.ipa Payload/ ``` • Upload the modified IPA file to Static Analysis and wait until it finished • Open the following pages: `http://mobsf/recent_scans/` `http://mobsf/ios/dynamic_analysis/` <img width="1119" alt="image-7" src="https://github.com/user-attachments/assets/a7a9ae2e-cd84-4ec8-8132-25140a209ca0" /> *Figure 8. DoS Example* <img width="1141" alt="image-8" src="https://github.com/user-attachments/assets/a76e03ae-b4c6-4003-a145-c1fa4c88a7a5" /> *Figure 9. DoS Example* _________________ ### Please, assign all credits to Oleg Surnin (Positive Technologies)

Mobile Security Framework (MobSF) es un framework automatizado y todo en uno para pruebas de penetración, análisis de malware y evaluación de seguridad de aplicaciones móviles (Android/iOS/Windows). Según la documentación de Apple para los identificadores de paquete, estos deben contener solo caracteres alfanuméricos (A–Z, a–z y 0–9), guiones (-) y puntos (.). Sin embargo, un atacante puede modificar manualmente este valor en el archivo `Info.plist` y agregar caracteres especiales al valor `CFBundleIdentifier`. Cuando la aplicación analiza los caracteres incorrectos en el identificador de paquete, encuentra un error. Como resultado, no mostrará el contenido y arrojará un error 500 en su lugar. La única forma de hacer que las páginas vuelvan a funcionar es eliminar manualmente la aplicación maliciosa del sistema. Este problema se ha solucionado en la versión 4.3.1 y se recomienda a todos los usuarios que actualicen. No existen workarounds para esta vulnerabilidad.