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

CWE-ID: CWE-61

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Archive_Tar
Web applications / Other software

Vendor: PHP Group

Description

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.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Archive_Tar: 0.3 - 1.4.11

---

External links
http://github.com/pear/Archive_Tar/commit/cde460582ff389404b5b3ccb59374e9b389de916

---

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.