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CVE-2020-5221

Directory Traversal (Chroot Escape) vulnerability in uftpd

HIGH
7.2
CVSS Score
Published: January 22, 2020 at 06:50 PM UTC
Updated: June 17, 2026 at 03:21 AM UTC
1 product affected across 1 vendorUftpd

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Severity
HIGH7.2
Exploit prediction
EPSS 1%

Description

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

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Uftpd· Troglobit
95%
v < 2.11
Affected range stops below 2.11, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/troglobit/uftpd/commit/455b47d3756aed162d2d0ef7f40b549f3b5b30fe
x_refsource_CONFIRMExploitThird Party Advisory
Source: [email protected]
https://github.com/troglobit/uftpd/security/advisories/GHSA-wmx8-v7mx-6x9h

CVSS

7.2HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-22

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