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Marvin Attack: potential key recovery through timing sidechannels

Moderate severity GitHub Reviewed Published Nov 28, 2023 to the GitHub Advisory Database • Updated Dec 14, 2023

Package

cargo rsa (Rust)

Affected versions

<= 0.9.6

Patched versions

None

Description

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

Published to the GitHub Advisory Database Nov 28, 2023
Reviewed Nov 28, 2023
Last updated Dec 14, 2023

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Weaknesses

CVE ID

No known CVE

GHSA ID

GHSA-4grx-2x9w-596c

Source code

Credits

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