CyberRota Analysis
AI-GeneratedThe vulnerability allows an attacker with write access to the stored ciphertext in the danielberkompas cloak library to manipulate encrypted data through bit flipping, enabling them to decrypt it to a chosen value. This poses a significant risk, as it can lead to unauthorized data modification without detection, particularly in applications relying on this library for encryption. Organizations using versions 0.1.0-pre and later should prioritize remediation, especially those handling sensitive information where data integrity is critical.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
Reliance on Obfuscation or Encryption of Security-Relevant Inputs without Integrity Checking vulnerability in danielberkompas cloak allows an attacker with write access to stored ciphertext to make it decrypt to a chosen value via bit flipping. Cloak.Ciphers.AES.CTR encrypts with AES-256 in CTR mode and stores the key tag, the IV and the ciphertext with no MAC. decrypt/2 checks only the key tag and the minimum length before it returns the plaintext, and Cloak.Ciphers.Deprecated.AES.CTR decrypts the legacy format the same way. CTR is a stream cipher, so a value XORed into the stored ciphertext is XORed into the plaintext at the same offset. An attacker who can write to the encrypted store (for example through SQL injection or a compromised replica) and who knows or can guess a stored plaintext can replace it with any value of the same length. The application receives that value with no error. This issue affects cloak: from 0.1.0-pre onward.