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VulnerabilityTrail of Bits·2 months ago

Factoring "short-sleeve" RSA keys with polynomials

Researchers discovered hundreds of "short-sleeve" RSA and DSA keys with biased bit patterns that could be quickly factored using a novel polynomial-based cryptanalytic technique. The vulnerability, traced to a type mismatch bug in CompleteFTP versions 10.0.0–12.0.0 (RSA) and 10.0.0–23.0.4 (DSA), affected 603 unique RSA keys and 74 DSA keys; EnterpriseDT has released detection and remediation tools for affected users. The research highlights how structural weaknesses in cryptographic implementations can enable practical attacks and underscores the importance of using standard cryptographic libraries rather

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