#VU50871 Path traversal

Published: 2021-02-23

Vulnerability identifier: #VU50871

Vulnerability risk: Medium

CVSSv3: 6.5 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-20247


Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Isync: mailbox synchronizer
Other software / Other software solutions

Vendor: ossi


The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to improper validation of mailbox names returned by IMAP LIST/LSUB in the mbsync command. A remote attacker can send a specially crafted HTTP request and read arbitrary files on the system.

Install update from vendor's website.

Vulnerable software versions

Isync: mailbox synchronizer: 1.3.4, 1.4.0


External links

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

Latest bulletins with this vulnerability