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
2020-12-18T19:15:14Z
Modified
2026-10-20T13:52:40Z
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
Show details 
{
    "extracted_events":  [
        {
            "cpe":  "cpe:2.3:a:troglobit:uftpd:*:*:*:*:*:*:*:*",
            "range":  [
                {
                    "introduced":  "2.7"
                },
                {
                    "last_affected":  "2.10"
                }
            ],
            "source":  "CPE_RANGE"
        },
        {
            "range":  [
                {
                    "fixed":  "455b47d3756aed162d2d0ef7f40b549f3b5b30fe"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        }
    ]
}

Affected versions

v2.*
v2.10
v2.7
v2.8
v2.9

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-20277.json"
vanir_signatures 
[
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
                "108229206972147259569248804372767412868",
                "276360762841382069748424337075868013451",
                "242312807191981524080516238265272007214",
                "250357959569044888915036652998736230067"
            ],
            "threshold":  0.9
        },
        "id":  "CVE-2020-20277-6bb940c7",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/troglobit/uftpd/commit/455b47d3756aed162d2d0ef7f40b549f3b5b30fe",
        "target":  {
            "file":  "src/common.c"
        }
    }
]
vanir_signatures_modified 
"2026-10-20T13:52:40Z"