Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS1jMzh3LTc0cGctMzZocs4AA3Z_

Marvin Attack: potential key recovery through timing sidechannels

Impact

Due to a non-constant-time implementation, information about the private key is leaked through timing information which is observable over the network. An attacker may be able to use that information to recover the key.

Patches

No patch is yet available, however work is underway to migrate to a fully constant-time implementation.

Workarounds

The only currently available workaround is to avoid using the rsa crate in settings where attackers are able to observe timing information, e.g. local use on a non-compromised computer is fine.

References

This vulnerability was discovered as part of the "Marvin Attack", which revealed several implementations of RSA including OpenSSL had not properly mitigated timing sidechannel attacks.

• https://rustsec.org/advisories/RUSTSEC-2023-0071.html
• https://people.redhat.com/~hkario/marvin/
• https://github.com/RustCrypto/RSA/issues/19

Permalink: https://github.com/advisories/GHSA-c38w-74pg-36hr
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS1jMzh3LTc0cGctMzZocs4AA3Z_
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: about 1 year ago
Updated: 12 months ago

CVSS Score: 5.9
CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Identifiers: GHSA-c38w-74pg-36hr, CVE-2023-49092
References:

• https://github.com/RustCrypto/RSA/security/advisories/GHSA-c38w-74pg-36hr
• https://nvd.nist.gov/vuln/detail/CVE-2023-49092
• https://github.com/RustCrypto/RSA/issues/19#issuecomment-1822995643
• https://rustsec.org/advisories/RUSTSEC-2023-0071.html
• https://github.com/advisories/GHSA-c38w-74pg-36hr

Repository: https://github.com/RustCrypto/RSA
Blast Radius: 20.6

Affected Packages