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CVE-2020-20277

CRITICAL
9.8
CVSS Score
Published: December 18, 2020 at 06:09 PM UTC
Updated: June 17, 2026 at 03:02 AM UTC
1 product affected across 1 vendorUftpd

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Severity
CRITICAL9.8
Exploit prediction
EPSS 26%

Description

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.

Affected

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

Uftpd· Troglobit
95%
2.7 ≤ v ≤ 2.10

Remediation

No guide yet

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

Patch and advisory references

References (3)

x_refsource_MISCExploitThird Party AdvisoryVDB Entry
Source: [email protected]
http://packetstormsecurity.com/files/167908/uftpd-2.10-Directory-Traversal.html
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://arinerron.com/blog/posts/6
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/troglobit/uftpd/commit/455b47d3756aed162d2d0ef7f40b549f3b5b30fe

CVSS

9.8CRITICAL[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-22

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