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CVE-2024-3296: Rust-openssl: timing based side-channel can lead to a bleichenbacher style attack

Description

A timing-based side-channel flaw exists in the rust-openssl package, which could be sufficient to recover a plaintext across a network in a Bleichenbacher-style attack. To achieve successful decryption, an attacker would have to be able to send a large number of trial messages for decryption. The vulnerability affects the legacy PKCS#1v1.5 RSA encryption padding mode.

Classification

CVE ID: CVE-2024-3296

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.04% (probability of being exploited)

EPSS Percentile: 11.87% (scored less or equal to compared to others)

EPSS Date: 2025-03-08 (when was this score calculated)

References

https://access.redhat.com/security/cve/CVE-2024-3296
https://bugzilla.redhat.com/show_bug.cgi?id=2269723

Timeline