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GHSA-4grx-2x9w-596c: Marvin Attack: potential key recovery through timing sidechannels

November 28, 2023 (updated May 4, 2026)

The Marvin Attack is a timing sidechannel vulnerability which allows performing RSA decryption and signing operations as an attacker with the ability to observe only the time of the decryption operation performed withthe private key.

A recent survey of RSA implementations found that the Rust rsa crate is one of many implementations vulnerable to this attack.

No fixed version is available at this time.

References

  • github.com/RustCrypto/RSA/issues/19
  • github.com/RustCrypto/RSA/issues/626
  • github.com/RustCrypto/RSA/security/advisories/GHSA-c38w-74pg-36hr
  • github.com/advisories/GHSA-4grx-2x9w-596c
  • rustsec.org/advisories/RUSTSEC-2023-0071.html

Code Behaviors & Features

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Affected versions

All versions up to 0.9.6

Solution

Unfortunately, there is no solution available yet.

Impact 5.9 MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Learn more about CVSS

Weakness

  • CWE-385: Covert Timing Channel

Source file

cargo/rsa/GHSA-4grx-2x9w-596c.yml

Spotted a mistake? Edit the file on GitLab.

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