ILIAS before 9.24, 10.12, and 11.5 contains a PHP object injection vulnerability that allows authenticated users with Test creation or import permission to deserialize arbitrary objects via crafted Test archives. Attackers can inject a malicious tst_sequence sequence attribute that is passed to unserialize(), abusing Guzzle or Monolog gadget chains to write PHP files and execute code.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
References 9
https://docu.ilias.de/go/blog/15821/952
disclosure@vulncheck.com
https://docu.ilias.de/ilias.php?baseClass=illmpresentationgui&obj_id=228077&ref…
disclosure@vulncheck.com
https://github.com/ILIAS-eLearning/ILIAS
disclosure@vulncheck.com
https://github.com/ILIAS-eLearning/ILIAS/blob/2a3758ee3b01e5c66922e08f58a218914…
disclosure@vulncheck.com
https://github.com/ILIAS-eLearning/ILIAS/blob/2a3758ee3b01e5c66922e08f58a218914…
disclosure@vulncheck.com
https://github.com/ILIAS-eLearning/ILIAS/commit/267d4645ea940f8f97d1a9838deff6a…
disclosure@vulncheck.com
https://github.com/ILIAS-eLearning/ILIAS/commit/ac4684239641fb3dab2d636b53a61c4…
disclosure@vulncheck.com
https://github.com/ILIAS-eLearning/ILIAS/commit/cf4e9c230edfd96fc94a1b1d355500a…
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/ilias-before-9.24-10.12-and-11.5-php-objec…
disclosure@vulncheck.com