Vulnerabilities

RUSTSEC-2023-0071

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.

RUSTSEC-2023-0065

Tungstenite allows remote attackers to cause a denial of service

The Tungstenite crate through 0.20.0 for Rust allows remote attackers to cause
a denial of service (minutes of CPU consumption) via an excessive length of an
HTTP header in a client handshake. The length affects both how many times a parse
is attempted (e.g., thousands of times) and the average amount of data for each
parse attempt (e.g., millions of bytes).