Vulnerability Details : CVE-2022-36071
Potential exploit
SFTPGo is configurable SFTP server with optional HTTP/S, FTP/S and WebDAV support. SFTPGo WebAdmin and WebClient support login using TOTP (Time-based One Time Passwords) as a secondary 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 version 2.2.0 to 2.3.3 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. This issue has been fixed in version 2.3.4. Recovery codes can now only be generated after enabling two-factor authentication and are deleted after disabling it.
Vulnerability category: BypassGain privilege
Products affected by CVE-2022-36071
- cpe:2.3:a:sftpgo_project:sftpgo:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2022-36071
0.02%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 2 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2022-36071
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
8.1
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N |
2.8
|
5.2
|
NIST | |
|
8.3
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L |
2.8
|
5.5
|
GitHub, Inc. |
CWE ids for CVE-2022-36071
-
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.Assigned by: security-advisories@github.com (Secondary)
-
The product generates a hash for a password, but it uses a scheme that does not provide a sufficient level of computational effort that would make password cracking attacks infeasible or expensive.Assigned by: nvd@nist.gov (Primary)
References for CVE-2022-36071
-
https://github.com/drakkan/sftpgo/issues/965
TOTP Generate Recovery Codes MFA · Issue #965 · drakkan/sftpgo · GitHubExploit;Issue Tracking;Patch;Third Party Advisory
-
https://github.com/drakkan/sftpgo/security/advisories/GHSA-54qx-8p8w-xhg8
Recovery codes abuse · Advisory · drakkan/sftpgo · GitHubMitigation;Third Party Advisory
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