Описание
MobSF Partial Denial of Service (DoS)
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.
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
• Modify the value of <key>CFBundleIdentifier</key> by adding restricted characters in the Info.plist file.
*Figure 7. Example with ' character`
• Zip the modified IPA file.
Listing 5. Zipping the file
• 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/
Figure 8. DoS Example
Figure 9. DoS Example
Please, assign all credits to Oleg Surnin (Positive Technologies)
Ссылки
- https://github.com/MobSF/Mobile-Security-Framework-MobSF/security/advisories/GHSA-jrm8-xgf3-fwqr
- https://nvd.nist.gov/vuln/detail/CVE-2025-24804
- https://github.com/MobSF/Mobile-Security-Framework-MobSF/commit/05206e72cae35b311615a70e51e1a946955c5e83
- https://developer.apple.com/documentation/bundleresources/information-property-list/cfbundleidentifier
- https://github.com/MobSF/Mobile-Security-Framework-MobSF/blob/d1d3b7a9aeb1a8c8c7c229a3455b19ade9fa8fe0/mobsf/MobSF/urls.py#L401
Пакеты
mobsf
<= 4.3.0
4.3.1
Связанные уязвимости
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.