CVE-2020-20277

EPSS 25.2%

Vexday Risk Score

28Low

SSVC decision (CISA)

Attend

PoC available → attend closely

Exploit maturity

Proof of concept

Public proof of concept exists, but not yet automated.

CVSS —EPSS 25.2%KEV nãoPoC públicaNuclei —Metasploit —Patch —

Lifecycle

18 Dec 2020Published on NVD

02 Aug 2022Public PoC

Weaponization speed

591 daysto first PoC

Recommendation: Plan a near-term fix — a public PoC already exists.

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

n/a · n/a

public PoCs found — 2

cve_referencepacketstormsecurity.com/files/167908/uftpd-2.10-Directory-Traversal.htmlunverified exploitdbwww.exploit-db.com/exploits/51000unverified

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

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