UBUNTU-CVE-2018-10362

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UBUNTU-CVE-2018-10362

Summary:

Details: An issue was discovered in phpLiteAdmin 1.9.5 through 1.9.7.1. Due to loose comparison with '==' instead of '===' in classes/Authorization.php for the user-provided login password, it is possible to login with a simpler password if the password has the form of a power in scientific notation (like '2e2' for '200' or '0e1234' for '0'). This is possible because, in the loose comparison case, PHP interprets the string as a number in scientific notation, and thus converts it to a number. After that, the comparison with '==' casts the user input (e.g., the string '200' or '0') to a number, too. Hence the attacker can login with just a '0' or a simple number he has to brute force. Strong comparison with '===' prevents the cast into numbers.

References: https://ubuntu.com/security/CVE-2018-10362, https://github.com/phpLiteAdmin/pla/issues/11, http://k3research.outerhaven.de/posts/small-mistakes-lead-to-big-problems.html, https://www.cve.org/CVERecord?id=CVE-2018-10362