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AlienVault OTX Vulnerabilities

AlienVault OTX Malware

A vulnerability was detected in Cesanta Mongoose up to 7.20. This impacts the function mg_chacha20_poly1305_decrypt of the file /src/tls_chacha20.c of the component Poly1305 Authentication Tag Handler. The manipulation results in improper verification of cryptographic signature. The attack may be launched remotely. This attack is characterized by high complexity. The exploitability is said to be difficult. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

CVE-2026-2968 is a cryptographic vulnerability found in Cesanta Mongoose, a widely used embedded web server and networking library, affecting all versions up to 7.20. The issue resides in the mg_chacha20_poly1305_decrypt function within the /src/tls_chacha20.c file, specifically in the Poly1305 authentication tag handler component. This function is responsible for verifying the integrity and authenticity of encrypted TLS data using the ChaCha20-Poly1305 AEAD cipher. Due to improper verification of the cryptographic signature, an attacker can potentially bypass the authentication mechanism, undermining the confidentiality and integrity guarantees of TLS sessions. The vulnerability can be exploited remotely without requiring authentication or user interaction, but the attack complexity is high and exploitability is difficult. No patches or fixes have been published, and the vendor has not responded to early disclosure attempts. The flaw could allow attackers to decrypt or tamper with TLS-protected communications in embedded devices or IoT systems using Mongoose, potentially exposing sensitive data or enabling further attacks. The CVSS 4.0 base score is 6.3, indicating medium severity, with network attack vector, high attack complexity, no privileges or user interaction needed, and limited impact on integrity. This vulnerability highlights risks in embedded TLS implementations and the importance of robust cryptographic verification.

Detailed information about CVE-2026-2968: Improper Verification of Cryptographic Signature in Cesanta Mongoose affecting Cesanta Mongoose. Get real-time updates

CVE-2026-2968: Improper Verification of Cryptographic Signature in Cesanta Mongoose - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2026-2968: Improper Verification of Cryptographic Signature in Cesanta Mongoose

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