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.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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. (CVE-2018-1000888)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2018-1000888)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote host is affected by the vulnerability described in GLSA-202006-14 (PEAR Archive_Tar: Remote code execution vulnerability)

    An issue was discovered in the PEAR module Archive_Tar&rsquo;s handling of       file paths within Tar achives.
  Impact :

    A local or remote attacker could possibly execute arbitrary code with       the privileges of the process.
  Workaround :

    Avoid handling untrusted Tar files with this package until you have       upgraded to a non-vulnerable version.

According to the version of the php-pear package installed, the EulerOS installation on the remote host is affected by the following vulnerability :

  - 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-i1/4z_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.
    (CVE-2018-1000888)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

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.(CVE-2018-1000888)

php-pear in php5 contains CWE-502 (Deserialization of Untrusted Data) and CWE-915 (Improperly Controlled Modification of Dynamically-Determined Object Attributes) vulnerabilities in its Archive_Tar class. When extract is called without a specific prefix path, 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, all with possible remote code execution that can result in files being deleted or possibly modified.

For Debian 8 'Jessie', this problem has been fixed in version 5.6.39+dfsg-0+deb8u2.

We recommend that you upgrade your php5 packages.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Fariskhi Vidyan discovered that the PEAR Archive_Tar package for handling tar files in PHP is prone to a PHP object injection vulnerability, potentially allowing a remote attacker to execute arbitrary code.

According to its self-reported version, the instance of Drupal running on the remote web server is 7.x prior to 7.62, 8.5.x prior to 8.5.9, or 8.6.x prior to 8.6.6. It is, therefore, affected by multiple phar handling vulnerabilities. An unauthenticated attacker could leverage these vulnerabilities to potentially perform remote code execution attacks and gain access in the context the web server user.

The remote Ubuntu 16.04 LTS / 18.04 LTS host has a package installed that is affected by a vulnerability as referenced in the USN-3857-1 advisory.

    Fariskhi Vidyan discovered that PEAR Archive_Tar incorrectly handled certain archive paths. A remote     attacker could possibly use this issue to execute arbitrary code.

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
426125	Alpine: drupal7: security update to 7.62-r0	Tenable Cloud Security	Alpine Linux Local Security Checks	high
426125	Alpine: drupal7: security update to 7.62-r0	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	high
221664	Linux Distros Unpatched Vulnerability : CVE-2018-1000888	Nessus	Misc.	high
409648	SCA: security update for pear/archive_tar (GHSA-3q76-jq6m-573p)	Tenable Cloud Security	SCA Checks	high
409648	SCA: security update for pear/archive_tar (GHSA-3q76-jq6m-573p)	Tenable Self-Hosted Container Security	SCA Checks	high
400629	Alpine: multiple drupal7 packages: security update to 7.61-r0 (deprecated)	Tenable Cloud Security	Alpine Linux Local Security Checks	high
400629	Alpine: multiple drupal7 packages: security update to 7.61-r0 (deprecated)	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	high
137451	GLSA-202006-14 : PEAR Archive_Tar: Remote code execution vulnerability	Nessus	Gentoo Local Security Checks	high
123621	EulerOS 2.0 SP5 : php-pear (EulerOS-SA-2019-1147)	Nessus	Huawei Local Security Checks	high
123595	EulerOS 2.0 SP2 : php-pear (EulerOS-SA-2019-1121)	Nessus	Huawei Local Security Checks	high
122160	Amazon Linux 2 : php-pear (ALAS-2019-1159)	Nessus	Amazon Linux Local Security Checks	high
122101	Debian DLA-1674-1 : php5 security update	Nessus	Debian Local Security Checks	high
121486	Debian DSA-4378-1 : php-pear - security update	Nessus	Debian Local Security Checks	high
121214	Drupal 7.x < 7.62 / 8.5.x < 8.5.9 / 8.6.x < 8.6.6 Multiple Vulnerabilities (SA-CORE-2019-001, SA-CORE-2019-002)	Nessus	CGI abuses	critical
121187	Ubuntu 16.04 LTS / 18.04 LTS : PEAR vulnerability (USN-3857-1)	Nessus	Ubuntu Local Security Checks	high

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CVE-2018-1000888

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Tenable Plugins

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