CVE-2025-9513 in fuso
Summary
by MITRE • 08/27/2025
A flaw has been found in editso fuso up to 1.0.4-beta.7. This affects the function PenetrateRsaAndAesHandshake of the file src/net/penetrate/handshake/mod.rs. This manipulation of the argument priv_key causes inadequate encryption strength. Remote exploitation of the attack is possible. A high degree of complexity is needed for the attack. The exploitability is reported as difficult.
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Analysis
by VulDB Data Team • 08/27/2025
The vulnerability identified as CVE-2025-9513 resides within the editso fuso software ecosystem, specifically targeting version 1.0.4-beta.7 and earlier releases. This flaw manifests in the PenetrateRsaAndAesHandshake function located within the src/net/penetrate/handshake/mod.rs file, representing a critical weakness in the cryptographic handshake mechanism that governs secure communications between networked entities. The vulnerability stems from improper handling of the private key argument within the cryptographic processing pipeline, creating a scenario where the encryption strength is significantly compromised. The affected software component operates at the network layer, specifically managing the secure establishment of connections through RSA and AES encryption protocols, making it a prime target for adversaries seeking to intercept or manipulate encrypted communications. This issue falls under the category of cryptographic weakness as classified by CWE-327, which specifically addresses the use of weak or broken cryptographic algorithms and implementations.
The technical exploitation of this vulnerability requires sophisticated manipulation of the private key argument during the handshake process, where the inadequate encryption strength manifests through weakened cryptographic parameters that could potentially allow attackers to perform cryptographic attacks such as key recovery or session hijacking. The attack complexity is rated as high, indicating that successful exploitation requires substantial technical expertise and resources, including detailed knowledge of the specific cryptographic implementation and potentially advanced cryptanalysis techniques. The remote exploitation capability means that attackers can target vulnerable systems without requiring physical access or local network presence, making this vulnerability particularly dangerous in distributed network environments where secure communications are paramount. The difficulty rating of exploitability suggests that while the attack is possible, it requires specialized knowledge and tools that may not be readily available to all threat actors, though this does not mitigate the risk for organizations using the affected software.
Organizations utilizing editso fuso software in version 1.0.4-beta.7 or earlier must urgently implement mitigations to protect their network infrastructure from potential exploitation. The most effective immediate solution involves upgrading to a patched version of the software where the cryptographic implementation has been corrected to use appropriate key sizes and encryption parameters. System administrators should also consider implementing network monitoring solutions that can detect anomalous cryptographic handshake patterns or unusual encryption parameter usage that might indicate exploitation attempts. The vulnerability's impact extends beyond simple data confidentiality, as compromised encryption could potentially allow attackers to impersonate legitimate network entities or decrypt sensitive communications. From an ATT&CK framework perspective, this vulnerability maps to techniques involving credential access and defense evasion, as successful exploitation could enable attackers to gain persistent access to network resources while potentially evading detection through weakened cryptographic signatures. Organizations should also review their network security policies and implement additional layers of protection such as network segmentation and enhanced authentication mechanisms to minimize the potential impact of any successful exploitation attempts.