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sequoia

In Sequoia before 2.1.0, aes_key_unwrap panics if passed a ciphertext that is too short. A remote attacker can take advantage of this issue to crash an application by sending a victim an encrypted message with a crafted PKESK or SKESK packet.

CVE-2025-67897 is a vulnerability identified in the Sequoia OpenPGP library, specifically in versions prior to 2.1.0. The root cause is a signed to unsigned conversion error (CWE-195) within the aes_key_unwrap function. This function is responsible for decrypting wrapped AES keys during the processing of encrypted messages. When the function receives a ciphertext that is shorter than expected, it triggers a panic, causing the application to crash. The vulnerability can be exploited remotely by an attacker who sends a crafted encrypted message containing a malformed PKESK (Public-Key Encrypted Session Key) or SKESK (Symmetric-Key Encrypted Session Key) packet. Exploitation does not require prior authentication but does require the victim to process the malicious message, implying some user interaction. The impact is a denial-of-service (DoS) condition, affecting the availability of the application or service relying on Sequoia for cryptographic operations. There is no indication that confidentiality or integrity of data is compromised. No public exploits have been reported to date. The CVSS v3.1 base score is 5.3, reflecting medium severity due to network attack vector, high attack complexity, no privileges required, and user interaction needed. The vulnerability highlights the importance of robust input validation and error handling in cryptographic libraries to prevent crashes from malformed inputs.

Detailed information about CVE-2025-67897: CWE-195 Signed to Unsigned Conversion Error in sequoia-pgp sequoia affecting sequoia-pgp sequoia. Get real-time updat

CVE-2025-67897: CWE-195 Signed to Unsigned Conversion Error in sequoia-pgp sequoia - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2025-67897: CWE-195 Signed to Unsigned Conversion Error in sequoia-pgp sequoia

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