CVE-2020-20277

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Source

https://cve.org/CVERecord?id=CVE-2020-20277

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-20277.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2020-20277

Published

2020-12-18T19:15:14.110Z

Modified

2026-04-11T09:46:20.935820Z

Severity

9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator

Summary

[none]

Details

There are multiple unauthenticated directory traversal vulnerabilities in different FTP commands in uftpd FTP server versions 2.7 to 2.10 due to improper implementation of a chroot jail in common.c's compose_abspath function that can be abused to read or write to arbitrary files on the filesystem, leak process memory, or potentially lead to remote code execution.

References

Affected packages

Git / github.com/troglobit/uftpd

Affected ranges

Type

GIT

Repo

https://github.com/troglobit/uftpd

Events

Introduced

b9c4a6fcb41427e1b3468141609173a41be6d947

Last affected

e82248683ed7d53be1e01526f7b2a53dde545ef9

Fixed

455b47d3756aed162d2d0ef7f40b549f3b5b30fe

Database specific

{
    "versions": [
        {
            "introduced": "2.7"
        },
        {
            "last_affected": "2.10"
        }
    ]
}

Affected versions

v2.*

v2.10

v2.7

v2.8

v2.9

Database specific

vanir_signatures_modified

"2026-04-11T09:46:20Z"

vanir_signatures

[
    {
        "id": "CVE-2020-20277-6bb940c7",
        "target": {
            "file": "src/common.c"
        },
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "108229206972147259569248804372767412868",
                "276360762841382069748424337075868013451",
                "242312807191981524080516238265272007214",
                "250357959569044888915036652998736230067"
            ],
            "threshold": 0.9
        },
        "signature_type": "Line",
        "source": "https://github.com/troglobit/uftpd/commit/455b47d3756aed162d2d0ef7f40b549f3b5b30fe",
        "signature_version": "v1"
    }
]

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-20277.json"