CVE-2018-1000888
php-pear - security update
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.
How to fix CVE-2018-1000888
To remediate CVE-2018-1000888, upgrade the affected package to a fixed version below.
- —upgrade to 5.6.39+dfsg-0+deb8u2 or later
- —upgrade to 1:1.10.6+submodules+notgz-1.1 or later
- —upgrade to 1:1.10.1+submodules+notgz-9+deb9u1 or later
- —upgrade to 1.4.4 or later
Is CVE-2018-1000888 being exploited?
Moderate — EPSS is 24.7%. Track this CVE but it's not at the top of the prioritisation list.
Affected packages (4)
- from 0, < 5.6.39+dfsg-0+deb8u2
- from 0, < 1:1.10.6+submodules+notgz-1.1
- from 0, < 1:1.10.1+submodules+notgz-9+deb9u1
- from 0, < 1.4.4
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |