UNIX symbolic link following in Archive_Tar - CVE-2020-36193
Published: January 18, 2021 / Updated: October 27, 2022
Vulnerability identifier: #VU49907
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber
CVE-ID: CVE-2020-36193
CWE-ID: CWE-61
Exploitation vector: Remote access
Exploit availability:
The vulnerability is being exploited in the wild
Vendor: PHP Group
Affected software:
Archive_Tar
Archive_Tar
Detailed vulnerability 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.
How to mitigate CVE-2020-36193
Install updates from vendor's website.