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Observable Timing Discrepancy in totp-rs

Moderate severity GitHub Reviewed Published May 9, 2022 in constantoine/totp-rs • Updated Jun 13, 2023

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

If you have any questions or comments about this advisory:

References

@constantoine constantoine published to constantoine/totp-rs May 9, 2022
Published by the National Vulnerability Database May 20, 2022
Published to the GitHub Advisory Database May 24, 2022
Reviewed May 24, 2022
Last updated Jun 13, 2023

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

Weaknesses

CVE ID

CVE-2022-29185

GHSA ID

GHSA-8vxv-2g8p-2249

Source code

Credits

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