Signature Detail

HTTP: PHP Laravel Framework token Unserialize Remote Command Execution

This signature detects attempts to exploit a known vulnerability against PHP Laravel framework. A successful attack can lead to arbitrary code execution.

Extended Description

In Laravel Framework through 5.5.40 and 5.6.x through 5.6.29, remote code execution might occur as a result of an unserialize call on a potentially untrusted X-XSRF-TOKEN value. This involves the decrypt method in Illuminate/Encryption/Encrypter.php and PendingBroadcast in gadgetchains/Laravel/RCE/3/chain.php in phpggc. The attacker must know the application key, which normally would never occur, but could happen if the attacker previously had privileged access or successfully accomplished a previous attack.

Affected Products

• Laravel laravel 5.5.40
• Laravel laravel 5.6.0
• Laravel laravel 5.6.1
• Laravel laravel 5.6.10
• Laravel laravel 5.6.11
• Laravel laravel 5.6.12
• Laravel laravel 5.6.13
• Laravel laravel 5.6.14
• Laravel laravel 5.6.15
• Laravel laravel 5.6.16
• Laravel laravel 5.6.17
• Laravel laravel 5.6.18
• Laravel laravel 5.6.19
• Laravel laravel 5.6.2
• Laravel laravel 5.6.20
• Laravel laravel 5.6.21
• Laravel laravel 5.6.22
• Laravel laravel 5.6.23
• Laravel laravel 5.6.24
• Laravel laravel 5.6.25
• Laravel laravel 5.6.26
• Laravel laravel 5.6.27
• Laravel laravel 5.6.28
• Laravel laravel 5.6.29
• Laravel laravel 5.6.3
• Laravel laravel 5.6.4
• Laravel laravel 5.6.5
• Laravel laravel 5.6.6
• Laravel laravel 5.6.7
• Laravel laravel 5.6.8
• Laravel laravel 5.6.9

References

• CVE: CVE-2018-15133
• CVE: CVE-2017-16894
• URL: https://packetstormsecurity.com/files/153641/laravel_token_unserialize_exec.rb.txt