#VU49907 UNIX symbolic link following in Archive_Tar

Published: 2022-10-27

Vulnerability identifier: #VU49907

Vulnerability risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2020-36193


Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Web applications / Other software

Vendor: PHP Group


The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to a symlink following issue in tar.php file in Archive_Tar. A remote attacker can pass specially crafted archive to the application and force the application to overwrite arbitrary files on the system using directory traversal sequences.

Successful exploitation of the vulnerability may allow an attacker to compromise the affected system.

Install updates from vendor's website.

Vulnerable software versions

Archive_Tar: 0.3 - 1.4.11

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?

Yes. This vulnerability is being exploited in the wild.

Latest bulletins with this vulnerability