Vulnerability · Published May 20, 2022 · Assigned by GitHub_M

CVE-2022-29185Observable Timing Discrepancy in totp-rs

Medium 4.2

In plain English

A medium-severity security flaw in totp-rs from constantoine. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 59% of all known vulnerabilities).

Severity (CVSS 3.1)4.2Medium

Exploit odds (30 days)0.9%top 41.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

totp-rs is a Rust library that permits the creation of 2FA authentification tokens per time-based one-time password (TOTP). Prior to version 1.1.0, token comparison was not constant time, and could theorically be used to guess value of an TOTP token, and thus reuse it in the same time window. The attacker would have to know the password beforehand nonetheless. Starting with patched version 1.1.0, the library uses constant-time comparison. There are currently no known workarounds.

Affected products (as reported)

Vendor	Product	Versions
constantoine	totp-rs	<1.1.0

Weakness: CWE-208, CWE-203 · Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:N/A:N

References

https://github.com/constantoine/totp-rs/security/advisories/GHSA-8vxv-2g8p-2249 x_refsource_CONFIRM
https://github.com/constantoine/totp-rs/issues/13 x_refsource_MISC
https://github.com/constantoine/totp-rs/releases/tag/v1.1.0 x_refsource_MISC