CVE-2020-5221 Directory Traversal (Chroot Escape) vulnerability in uftpd
Unauthenticated attackers can escape the chroot jail via directory traversal in uftpd to read and write arbitrary files on the server.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2020-5221?
CVE-2020-5221 is a medium-severity path traversal vulnerability in troglobit uftpd, published on 22 Jan 2020. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official 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
Weakness: CWE-22
Which versions are affected by CVE-2020-5221?
It affects 1 product.
Products include Troglobit Uftpd.
How do I fix CVE-2020-5221?
No fix has been published for CVE-2020-5221 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2020-5221 being exploited?
There is no known exploitation of CVE-2020-5221 in the wild and no public exploit code.
Other vulnerabilities in troglobit uftpd
Sources
Also known as GHSA-f8pr-x4hc-3mhf, GHSA-wmx8-v7mx-6x9h.