CVEvulnerability

CVE-2018-1000888

8.8 HIGH Published 2018-12-28 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2018-12-28
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.0 ([email protected])
8.8 HIGH — CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected])
6.8 MEDIUM — AV:N/AC:M/Au:N/C:P/I:P/A:P
Weaknesses
CWE-502

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.

Affected configurations

• php pear archive tar (<= 1.4.3) • canonical ubuntu linux 16.04 • canonical ubuntu linux 18.04 • canonical ubuntu linux 18.10 • debian debian linux 8.0 • debian debian linux 9.0

Related

Weakness · CWE (1)

  • CWE-502 Deserialization of Untrusted Data weakness

References