Vulnerabilities > CVE-2017-9841 - Code Injection vulnerability in multiple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
HIGH Integrity impact
HIGH Availability impact
HIGH Summary
Util/PHP/eval-stdin.php in PHPUnit before 4.8.28 and 5.x before 5.6.3 allows remote attackers to execute arbitrary PHP code via HTTP POST data beginning with a "<?php " substring, as demonstrated by an attack on a site with an exposed /vendor folder, i.e., external access to the /vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php URI.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Leverage Executable Code in Non-Executable Files An attack of this type exploits a system's trust in configuration and resource files, when the executable loads the resource (such as an image file or configuration file) the attacker has modified the file to either execute malicious code directly or manipulate the target process (e.g. application server) to execute based on the malicious configuration parameters. Since systems are increasingly interrelated mashing up resources from local and remote sources the possibility of this attack occurring is high. The attack can be directed at a client system, such as causing buffer overrun through loading seemingly benign image files, as in Microsoft Security Bulletin MS04-028 where specially crafted JPEG files could cause a buffer overrun once loaded into the browser. Another example targets clients reading pdf files. In this case the attacker simply appends javascript to the end of a legitimate url for a pdf (http://www.gnucitizen.org/blog/danger-danger-danger/) http://path/to/pdf/file.pdf#whatever_name_you_want=javascript:your_code_here The client assumes that they are reading a pdf, but the attacker has modified the resource and loaded executable javascript into the client's browser process. The attack can also target server processes. The attacker edits the resource or configuration file, for example a web.xml file used to configure security permissions for a J2EE app server, adding role name "public" grants all users with the public role the ability to use the administration functionality. The server trusts its configuration file to be correct, but when they are manipulated, the attacker gains full control.
- Manipulating User-Controlled Variables This attack targets user controlled variables (DEBUG=1, PHP Globals, and So Forth). An attacker can override environment variables leveraging user-supplied, untrusted query variables directly used on the application server without any data sanitization. In extreme cases, the attacker can change variables controlling the business logic of the application. For instance, in languages like PHP, a number of poorly set default configurations may allow the user to override variables.
Nessus
NASL family FreeBSD Local Security Checks NASL id FREEBSD_PKG_298829E2CCCE11E792E4000C29649F92.NASL description mediawiki reports : security fixes : T128209: Reflected File Download from api.php. Reported by Abdullah Hussam. T165846: BotPasswords doesn last seen 2020-06-01 modified 2020-06-02 plugin id 104693 published 2017-11-20 reporter This script is Copyright (C) 2017-2018 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/104693 title FreeBSD : mediawiki -- multiple vulnerabilities (298829e2-ccce-11e7-92e4-000c29649f92) NASL family Gentoo Local Security Checks NASL id GENTOO_GLSA-201711-15.NASL description The remote host is affected by the vulnerability described in GLSA-201711-15 (PHPUnit: Remote code execution) When PHPUnit is installed in a production environment via composer and these modules are in a web accessible directory, the eval-stdin.php file in PHPUnit contains vulnerable statements that trigger the vulnerability. Impact : A remote attacker could possibly execute arbitrary PHP code or cause a Denial of Service condition. Workaround : There are several ways to fix or mitigate this vulnerability: Remove PHPUnit from the production environment. Update PHPUnit. Manually apply the patch. Disable direct access to the composer packages by placing .htaccess file to /vendor folder. last seen 2020-06-01 modified 2020-06-02 plugin id 104696 published 2017-11-20 reporter This script is Copyright (C) 2017-2018 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/104696 title GLSA-201711-15 : PHPUnit: Remote code execution
References
- https://github.com/sebastianbergmann/phpunit/pull/1956
- https://github.com/sebastianbergmann/phpunit/commit/284a69fb88a2d0845d23f42974a583d8f59bf5a5
- http://www.securityfocus.com/bid/101798
- http://www.securitytracker.com/id/1039812
- https://security.gentoo.org/glsa/201711-15
- http://web.archive.org/web/20170701212357/http://phpunit.vulnbusters.com/
- https://www.oracle.com/security-alerts/cpuoct2021.html