Executive Summary

Informations
Name CVE-2018-1000888 First vendor Publication 2018-12-28
Vendor Cve Last vendor Modification 2020-06-15

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Overall CVSS Score 8.8
Base Score 8.8 Environmental Score 8.8
impact SubScore 5.9 Temporal Score 8.8
Exploitabality Sub Score 2.8
 
Attack Vector Network Attack Complexity Low
Privileges Required None User Interaction Required
Scope Unchanged Confidentiality Impact High
Integrity Impact High Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:M/Au:N/C:P/I:P/A:P)
Cvss Base Score 6.8 Attack Range Network
Cvss Impact Score 6.4 Attack Complexity Medium
Cvss Expoit Score 8.6 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

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.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1000888

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-502 Deserialization of Untrusted Data

CPE : Common Platform Enumeration

TypeDescriptionCount
Os 3
Os 2

Snort® IPS/IDS

Date Description
2019-03-14 PEAR Archive_Tar PHP object injection attempt
RuleID : 49185 - Revision : 1 - Type : INDICATOR-COMPROMISE
2019-03-14 PEAR Archive_Tar PHP object injection attempt
RuleID : 49184 - Revision : 1 - Type : INDICATOR-COMPROMISE

Nessus® Vulnerability Scanner

Date Description
2019-01-16 Name : A PHP application running on the remote web server is affected by multiple vu...
File : drupal_8_6_6.nasl - Type : ACT_GATHER_INFO

Sources (Detail)

Source Url
CONFIRM https://pear.php.net/bugs/bug.php?id=23782
https://pear.php.net/package/Archive_Tar/download/
DEBIAN https://www.debian.org/security/2019/dsa-4378
EXPLOIT-DB https://www.exploit-db.com/exploits/46108/
GENTOO https://security.gentoo.org/glsa/202006-14
MISC https://blog.ripstech.com/2018/new-php-exploitation-technique/
https://cdn2.hubspot.net/hubfs/3853213/us-18-Thomas-It%27s-A-PHP-Unserializat...
MLIST https://lists.debian.org/debian-lts-announce/2019/02/msg00020.html
UBUNTU https://usn.ubuntu.com/3857-1/

Alert History

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Date Informations
2021-05-04 13:07:48
  • Multiple Updates
2021-04-22 02:21:28
  • Multiple Updates
2020-06-16 00:24:43
  • Multiple Updates
2020-05-23 02:09:54
  • Multiple Updates
2020-05-23 01:05:32
  • Multiple Updates
2019-03-05 21:19:16
  • Multiple Updates
2019-02-12 17:19:10
  • Multiple Updates
2019-02-11 21:19:16
  • Multiple Updates
2019-01-31 17:19:08
  • Multiple Updates
2019-01-15 17:19:25
  • Multiple Updates
2019-01-11 17:19:02
  • Multiple Updates
2018-12-28 21:19:15
  • First insertion