National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2018-1000888 Detail

Description

PEAR Archive_Tar version 1.4.3 and earlier contains a CWE-502, CWE-915 vulnerability in the Archive_Tar class. There are several file operations with `$v_header['filename']` as parameter (such as file_exists, is_file, is_dir, etc). When extract is called without a specific prefix path, we can trigger unserialization by crafting a tar file with `phar://[path_to_malicious_phar_file]` as path. Object injection can be used to trigger destruct in the loaded PHP classes, e.g. the Archive_Tar class itself. With Archive_Tar object injection, arbitrary file deletion can occur because `@unlink($this->_temp_tarname)` is called. If another class with useful gadget is loaded, it may possible to cause remote code execution that can result in files being deleted or possibly modified. This vulnerability appears to have been fixed in 1.4.4.

Source:  MITRE
Description Last Modified:  12/28/2018

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Hyperlink Resource
https://blog.ripstech.com/2018/new-php-exploitation-technique/
https://cdn2.hubspot.net/hubfs/3853213/us-18-Thomas-It%27s-A-PHP-Unserialization-Vulnerability-Jim-But-Not-As-We-....pdf
https://pear.php.net/bugs/bug.php?id=23782
https://pear.php.net/package/Archive_Tar/download/
https://usn.ubuntu.com/3857-1/
https://www.exploit-db.com/exploits/46108/

Technical Details

Vulnerability Type (View All)

Change History

2 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2018-1000888
NVD Published Date:
12/28/2018
NVD Last Modified:
01/15/2019