Vulnerability Details : CVE-2020-5221
In uftpd before 2.11, it is possible for an unauthenticated user to perform a directory traversal attack using multiple different FTP commands and read and write to arbitrary locations on the filesystem due to the lack of a well-written chroot jail in compose_abspath(). This has been fixed in version 2.11
Vulnerability category: Directory traversal
Products affected by CVE-2020-5221
- cpe:2.3:a:troglobit:uftpd:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-5221
0.11%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 43 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-5221
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.4
|
MEDIUM | AV:N/AC:L/Au:N/C:P/I:P/A:N |
10.0
|
4.9
|
NIST | |
|
7.2
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |
3.9
|
2.7
|
NIST | |
|
6.5
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L |
2.3
|
3.7
|
GitHub, Inc. |
CWE ids for CVE-2020-5221
-
The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.Assigned by:
- nvd@nist.gov (Primary)
- security-advisories@github.com (Secondary)
References for CVE-2020-5221
-
https://github.com/troglobit/uftpd/security/advisories/GHSA-wmx8-v7mx-6x9h
Directory Traversal (Chroot Escape) · Advisory · troglobit/uftpd · GitHubExploit;Third Party Advisory
-
https://github.com/troglobit/uftpd/commit/455b47d3756aed162d2d0ef7f40b549f3b5b30fe
FTP/TFTP: Fix directory traversal regression, reported by Aaron Esau · troglobit/uftpd@455b47d · GitHubPatch;Third Party Advisory
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