Vulnerability · Published Nov 28, 2023 · Assigned by GitHub_M
CVE-2023-49092RustCrypto/RSA vulnerable to a Marvin Attack via key recovery through timing sidechannels
Medium 5.9
In plain English
A medium-severity security flaw in RSA from RustCrypto. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 49% of all known vulnerabilities).
Official description
RustCrypto/RSA is a portable RSA implementation in pure Rust. 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. There is currently no fix available. As a workaround, avoid using the RSA crate in settings where attackers are able to observe timing information, e.g. local use on a non-compromised computer.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:13 | rust-rsa | no fix listed | DEBIAN-CVE-2023-49092 |
| Debian:14 | rust-rsa | no fix listed | DEBIAN-CVE-2023-49092 |
| Ubuntu:24.04:LTS | rust-rsa | no fix listed | UBUNTU-CVE-2023-49092 |
| Ubuntu:25.10 | rust-rsa | no fix listed | UBUNTU-CVE-2023-49092 |
| Ubuntu:26.04:LTS | rust-rsa | no fix listed | UBUNTU-CVE-2023-49092 |
| Ubuntu:26.10 | rust-rsa | no fix listed | UBUNTU-CVE-2023-49092 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| RustCrypto | RSA | <= 0.9.5 |
Weakness: CWE-385 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
References
- https://github.com/RustCrypto/RSA/security/advisories/GHSA-c38w-74pg-36hr x_refsource_CONFIRM
- https://github.com/RustCrypto/RSA/issues/19#issuecomment-1822995643 x_refsource_MISC