CVE-2025-21427 in Snapdragon Auto
Summary
by MITRE • 07/08/2025
Information disclosure while decoding this RTP packet Payload when UE receives the RTP packet from the network.
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Analysis
by VulDB Data Team • 09/07/2025
This vulnerability represents a critical information disclosure flaw in real-time transport protocol implementations within telecommunications infrastructure. The issue manifests when user equipment receives and processes RTP packets from network sources, specifically during the payload decoding phase. The vulnerability stems from insufficient input validation and improper handling of malformed or unexpected packet structures during the decoding process. This weakness allows attackers to potentially extract sensitive information through carefully crafted RTP packet payloads that trigger unexpected behavior in the receiving UE systems.
The technical implementation flaw occurs at the application layer where RTP packet processing routines fail to properly sanitize incoming payload data before decoding operations. When the user equipment attempts to decode maliciously constructed RTP payloads, the system's decoding mechanism may expose internal memory contents, configuration data, or other sensitive information through error messages, debugging output, or direct memory access patterns. This type of vulnerability typically falls under CWE-200 Information Exposure, where system information is unintentionally revealed to unauthorized parties. The vulnerability is particularly concerning in mobile network environments where UE devices process numerous RTP packets during voice and video communications, creating multiple attack vectors for information leakage.
The operational impact of this vulnerability extends beyond simple information disclosure, as it could enable adversaries to gather intelligence about network configurations, device capabilities, or even user communication patterns. Attackers could leverage this weakness to perform reconnaissance activities against mobile networks, potentially identifying vulnerable endpoints or extracting network topology information. The vulnerability aligns with ATT&CK technique T1005 Data from Local System, where adversaries access sensitive data through system-level information gathering. In telecommunications contexts, this could compromise user privacy, network security, and potentially enable more sophisticated attacks such as session hijacking or targeted surveillance operations.
Mitigation strategies should focus on implementing robust input validation mechanisms within RTP processing components, ensuring that all incoming packet payloads are properly sanitized before decoding operations commence. Network operators should deploy updated firmware and software patches that address the specific decoding vulnerabilities in their UE implementations. Additionally, implementing proper error handling and logging controls can prevent sensitive information from being exposed through system responses. Organizations should also consider network segmentation and monitoring solutions to detect anomalous RTP packet patterns that may indicate exploitation attempts. Regular security assessments of telecommunication infrastructure and adherence to industry standards such as 3GPP security guidelines should be maintained to prevent similar vulnerabilities from emerging in future implementations.