ASA-2019-00035 – phpMyAdmin: Arbitrary file read vulnerability


Allele Security Alert

ASA-2019-00035

Identifier(s)

ASA-2019-00035, PMASA-2019-1, CVE-2019-6799

Title

Arbitrary file read vulnerability

Vendor(s)

The phpMyAdmin Project

Product(s)

phpMyAdmin

Affected version(s)

phpMyAdmin versions from at least 4.0 through 4.8.4

Fixed version(s)

phpMyAdmin 4.8.5

Proof of concept

Unknown

Description

When AllowArbitraryServer configuration set to true, with the use of a rogue MySQL server, an attacker can read any file on the server that the web server’s user can access.

phpMyadmin attempts to block the use of LOAD DATA INFILE, but due to a bug in PHP, this check is not honored. Additionally, when using the ‘mysql’ extension, mysql.allow_local_infile is enabled by default. Both of these conditions allow the attack to occur.

Technical details

Unknown

Credits

Tongqing Zhu (404 Team), Hongkun Zeng, chromium1337, Hanno Böck and Jakub Vrána

Reference(s)

phpMyAdmin – Security – PMASA-2019-1
https://www.phpmyadmin.net/security/PMASA-2019-1/

Deny using mysql extension with mysql.allow_local_infile
https://github.com/phpmyadmin/phpmyadmin/commit/aeac90623e525057a7672ab3d98154b5c57c15ec

Actually set MYSQLI_OPT_LOCAL_INFILE
https://github.com/phpmyadmin/phpmyadmin/commit/c5e01f84ad48c5c626001cb92d7a95500920a900

CVE-2019-6799
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6799

CVE-2019-6799
https://nvd.nist.gov/vuln/detail/CVE-2019-6799

If there is any error in this alert or you wish a comprehensive analysis, let us know.

Last modified: June 2, 2019

We are not responsible for any data loss, device corruption or any other type of issue due to the use of any information mentioned in our security alerts.