oss-security - Authorization bypass in PHPLiteAdmin since 1.9.5

Follow @Openwall on Twitter for new release announcements and other news

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date: Mon, 23 Apr 2018 06:41:09 +0200
From: Karsten König <mail@...enig.net>
To: oss-security@...ts.openwall.com, fulldisclosure@...lists.org
Subject: Authorization bypass in PHPLiteAdmin since 1.9.5

Hello,

I found a small issue in PHPLiteAdmin. It's an authorization bypass
which works since version 1.9.5 from 2014 (current is 1.9.7.1) because
PLA uses '==' instead of '===' for the password comparison in
'attemptGrant' of the 'Authorization' class. If the password is set to
one which correspondends to a number in scientific notation, one could
easier bruteforce the password or bypass it completely, e.g.:

php > var_dump('200' == '2e2');
bool(true)
php > var_dump('0' == '0e2');
bool(true)
php > var_dump('0' == '0e2342');
bool(true)

I opened an issue at GitHub for this[0] and have written about it[1]
(section 2 is the interesting one for this issue).

Best,

Karsten

[0] https://github.com/phpLiteAdmin/pla/issues/11
[1]
http://k3research.outerhaven.de/posts/small-mistakes-lead-to-big-problems.html

Please check out the Open Source Software Security Wiki, which is counterpart to this mailing list.

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.