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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities
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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.


Metrics

 
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CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://blog.ripstech.com/2018/new-php-exploitation-technique/ Exploit  Third Party Advisory 
https://cdn2.hubspot.net/hubfs/3853213/us-18-Thomas-It%27s-A-PHP-Unserialization-Vulnerability-Jim-But-Not-As-We-....pdf Exploit  Technical Description  Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2019/02/msg00020.html Third Party Advisory 
https://pear.php.net/bugs/bug.php?id=23782 Broken Link  Third Party Advisory 
https://pear.php.net/package/Archive_Tar/download/ Broken Link  Third Party Advisory 
https://security.gentoo.org/glsa/202006-14
https://usn.ubuntu.com/3857-1/ Third Party Advisory 
https://www.debian.org/security/2019/dsa-4378 Third Party Advisory 
https://www.exploit-db.com/exploits/46108/ Exploit  Third Party Advisory  VDB Entry 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-502 Deserialization of Untrusted Data cwe source acceptance level NIST  

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Change History

8 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2018-1000888
NVD Published Date:
12/28/2018
NVD Last Modified:
06/15/2020
Source:
MITRE