8.3 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
0.001 Low
EPSS
Percentile
30.6%
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.
Fixed in v2.3.4.
Recovery codes can now only be generated after enabling two-factor authentication and are deleted after disabling it.
Regenerate recovery codes after enabling two-factor authentication.
CPE | Name | Operator | Version |
---|---|---|---|
github.com/drakkan/sftpgo/v2 | ge | 2.2.0 | |
github.com/drakkan/sftpgo/v2 | lt | 2.3.4 |