CVE-2022-24406 in OX App Suite
Summary
by MITRE • 07/27/2022
OX App Suite through 7.10.6 allows SSRF because multipart/form-data boundaries are predictable, and this can lead to injection into internal Documentconverter API calls.
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 08/28/2022
The vulnerability CVE-2022-24406 affects OX App Suite versions through 7.10.6 and represents a significant server-side request forgery vulnerability that stems from predictable multipart/form-data boundaries. This flaw allows attackers to manipulate internal API calls by injecting malicious data into the document conversion process, creating a pathway for unauthorized access to internal systems and services.
The technical implementation of this vulnerability relies on the predictable nature of multipart boundary strings used in HTTP requests. When OX App Suite processes file uploads through its Documentconverter API, it uses boundaries that can be easily guessed or enumerated by an attacker. This predictability enables malicious actors to craft specially formatted requests that can inject arbitrary data into the internal API calls, effectively bypassing normal access controls and authentication mechanisms.
The operational impact of this vulnerability extends beyond simple data exfiltration or service disruption. Attackers can leverage this SSRF capability to probe internal network services, potentially accessing sensitive internal APIs, databases, or other systems that should normally be isolated from external access. The document conversion functionality becomes a vector for reconnaissance and lateral movement within the network infrastructure, as the internal Documentconverter API calls can be manipulated to target various internal endpoints.
This vulnerability aligns with CWE-918, which specifically addresses server-side request forgery, and demonstrates how predictable boundary strings in multipart form data can create security weaknesses. From an ATT&CK perspective, this represents a technique that can be used for initial access and lateral movement, potentially enabling more sophisticated attacks. The vulnerability also maps to TTPs related to privilege escalation and information gathering through internal service enumeration.
Mitigation strategies should focus on implementing randomized boundary strings for multipart form data processing, ensuring that the boundary values used in HTTP requests cannot be easily predicted or generated by attackers. Organizations should also implement strict input validation and sanitization for all data entering the document conversion pipeline, along with network segmentation and access controls that limit internal API exposure. Additionally, regular security testing and code reviews should be conducted to identify similar patterns in boundary handling and prevent future occurrences of predictable data structures that could be exploited in similar fashion.