Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS01NHF4LThwOHcteGhnOM4AAu2C

SFTPGo vulnerable to recovery codes abuse

Impact

SFTPGo WebAdmin and WebClient support login using TOTP (Time-based One Time Passwords) as a seconday authentication factor. Because TOTPs are often configured on mobile devices that can be lost, stolen or damaged, SFTPGo also supports recovery codes. These are a set of one time use codes that can be used instead of the TOTP.

In SFTPGo versions from v2.2.0 to v2.3.3 recovery codes can be generated before enabling two-factor authentication.
An attacker who knows the user's password could potentially generate some recovery codes and then bypass two-factor authentication after it is enabled on the account at a later time.

Patches

Fixed in v2.3.4.
Recovery codes can now only be generated after enabling two-factor authentication and are deleted after disabling it.

Workarounds

Regenerate recovery codes after enabling two-factor authentication.

References

https://github.com/drakkan/sftpgo/issues/965

Permalink: https://github.com/advisories/GHSA-54qx-8p8w-xhg8
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS01NHF4LThwOHcteGhnOM4AAu2C
Source: GitHub Advisory Database
Origin: Unspecified
Severity: High
Classification: General
Published: over 1 year ago
Updated: over 1 year ago

CVSS Score: 8.3
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L

Identifiers: GHSA-54qx-8p8w-xhg8, CVE-2022-36071
References:

• https://github.com/drakkan/sftpgo/security/advisories/GHSA-54qx-8p8w-xhg8
• https://nvd.nist.gov/vuln/detail/CVE-2022-36071
• https://github.com/drakkan/sftpgo/issues/965
• https://github.com/advisories/GHSA-54qx-8p8w-xhg8

Repository: https://github.com/drakkan/sftpgo
Blast Radius: 0.0

Affected Packages