CVE-2022-36071
SFTPGo vulnerable to recovery codes abuse
Impact
### 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
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/drakkan/sftpgo/v2 | >= 2.2.0, < 2.3.4 | 2.3.4 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Sftpgo Project | Sftpgo | from 2.2.0 before 2.3.4 |