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Observable Timing Discrepancy in totp-rs

Moderate
constantoine published GHSA-8vxv-2g8p-2249 May 9, 2022

Package

cargo totp-rs (Rust)

Affected versions

<1.1.0

Patched versions

1.1.0

Description

Impact

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.

Patches

Library now used constant-time comparison.

Workarounds

No.

For more information

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Severity

Moderate
4.2
/ 10

CVSS base metrics

Attack vector
Network
Attack complexity
High
Privileges required
High
User interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:N/A:N

CVE ID

CVE-2022-29185

Weaknesses