What’s Vulnerable › Vulnerabilities

CVE-2020-20277

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 26.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-12-18 · updated 2026-06-17
• Weakness: CWE-22

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 products

• troglobit uftpd: from 2.7 through 2.10

References

• http://packetstormsecurity.com/files/167908/uftpd-2.10-Directory-Traversal.html
• https://arinerron.com/blog/posts/6
• https://github.com/troglobit/uftpd/commit/455b47d3756aed162d2d0ef7f40b549f3b5b30fe
• http://packetstormsecurity.com/files/167908/uftpd-2.10-Directory-Traversal.html
• https://arinerron.com/blog/posts/6
• https://github.com/troglobit/uftpd/commit/455b47d3756aed162d2d0ef7f40b549f3b5b30fe

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