Insecure service configuration - App Transport Security
Description
The NSAppTransportSecurity function has the NSAllowsArbitraryLoads option enabled which allows insecure (HTTP) connections to the application. Good security practices state that insecure connections from the app to external servers should not be allowed.
Impact
Conduct MitM attacks over insecure channels to obtain sensitive user information.
Recommendation
Configure in the applications info.plist following good security practices.
Threat
Internal attacker on the same network segment.
Expected Remediation Time
⌚ 30 minutes.
Score
Default score using CVSS 3.1. It may change depending on the context of the vulnerability.
Base
- Attack vector: A
- Attack complexity: H
- Privileges required: N
- User interaction: R
- Scope: U
- Confidentiality: L
- Integrity: N
- Availability: N
Temporal
- Exploit code madurity: X
- Remediation level: O
- Report confidence: X
Result
- Vector string: CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N/E:X/RL:O/RC:X
- Score:
- Base: 2.6
- Temporal: 2.5
- Severity:
- Base: Low
- Temporal: Low
Code Examples
Compliant code
The info.plist is correctly configured to avoid insecure http loads
<key>NSAppTransportSecurity</key>
<dict>
<key>NSExceptionDomains</key>
<dict>
<key>yourdomain.com</key>
<dict>
<key>NSTemporaryExceptionAllowsInsecureHTTPLoads</key>
<false/>
<key>NSAllowsArbitraryLoads</key>
<false/>
</dict>
</dict>
</dict>
Non compliant code
The info.plist file has some insecure parameters
<key>NSAppTransportSecurity</key>
<dict>
<key>NSExceptionDomains</key>
<dict>
<key>yourdomain.com</key>
<dict>
<key>NSTemporaryExceptionAllowsInsecureHTTPLoads</key>
<true/>
<key>NSAllowsArbitraryLoads</key>
<true/>
</dict>
</dict>
</dict>
Requirements
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