Vulnerability · Published Dec 18, 2020 · Assigned by mitre

CVE-2020-20277

Critical 9.8

In plain English

A critical-severity security flaw in the affected software. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 26.2% (higher than 98% of all known vulnerabilities).

Severity (CVSS NVD)9.8Critical

Exploit odds (30 days)26.2%top 2.0% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official 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 (as reported)

Vendor	Product	Versions
n/a	n/a	n/a

References

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