CVE-2018-1000888

CVSS V2 Medium 6.8 CVSS V3 High 8.8
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.
Overview
  • CVE ID
  • CVE-2018-1000888
  • Assigner
  • cve@mitre.org
  • Vulnerability Status
  • Modified
  • Published Version
  • 2018-12-28T16:29:01
  • Last Modified Date
  • 2020-06-15T18:15:10
Weakness Enumerations
CWE URL
CWE-502 http://cwe.mitre.org/data/definitions/502.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:php:pear_archive_tar:*:*:*:*:*:*:*:* 1 OR 1.4.3
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* 1 OR
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* 1 OR
cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:M/Au:N/C:P/I:P/A:P
  • Access Vector
  • NETWORK
  • Access Compatibility
  • MEDIUM
  • Authentication
  • NONE
  • Confidentiality Impact
  • PARTIAL
  • Integrity Impact
  • PARTIAL
  • Availability Impact
  • PARTIAL
  • Base Score
  • 6.8
  • Severity
  • MEDIUM
  • Exploitability Score
  • 8.6
  • Impact Score
  • 6.4
CVSS Version 3
  • Version
  • 3.0
  • Vector String
  • CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • REQUIRED
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • HIGH
  • Availability Impact
  • HIGH
  • Base Score
  • 8.8
  • Base Severity
  • HIGH
  • Exploitability Score
  • 2.8
  • Impact Score
  • 5.9
References
Reference URL Reference Tags
https://pear.php.net/package/Archive_Tar/download/ Broken Link Third Party Advisory
https://pear.php.net/bugs/bug.php?id=23782 Broken Link 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://blog.ripstech.com/2018/new-php-exploitation-technique/ Exploit Third Party Advisory
https://www.exploit-db.com/exploits/46108/ Exploit Third Party Advisory VDB Entry
https://usn.ubuntu.com/3857-1/ Third Party Advisory
https://www.debian.org/security/2019/dsa-4378 Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/02/msg00020.html Third Party Advisory
https://security.gentoo.org/glsa/202006-14
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2018-1000888
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1000888
History
Created Old Value New Value Data Type Notes
2022-05-10 16:42:40 Added to TrackCVE
2022-12-03 15:48:23 2018-12-28T16:29Z 2018-12-28T16:29:01 CVE Published Date updated
2022-12-03 15:48:23 2020-06-15T18:15:10 CVE Modified Date updated
2022-12-03 15:48:23 Modified Vulnerability Status updated