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GHSA-jq87-2wxp-8349

HighCVSS 7.5 / 10
Published Jun 7, 2024·Last modified Dec 4, 2024
Affected Components(0)

No affected components available

Description

In Zend Framework 2, Zend\Mvc\Router\Http\Query is used primarily to allow appending query strings to URLs when assembled. However, due to the fact that it captures any query parameters into the RouteMatch, and the fact that RouteMatch parameters are merged with any parent routes, this can lead to overriding already captured routing parameters, bypassing constraints defined in the parents.

As an example, consider the following route definition:

array(
    'user' => array(
        'type' => 'segment',
        'options' => array(
            'route' => '/user/:key',
            'defaults' => array(
                'controller' => 'UserController',
                'action'     => 'show-action',
            ),
            'constraints' => array(
                'key' => '[a-z0-9]+',
            ),
        ),
        'child_routes' => array(
            'query' => array('type' => 'query'),
        ),
    ),
)

If the request URI was /user/foo/?controller=SecretController&key=invalid_value, the RouteMatch returned after routing would contain the following:

array(
    'controller' => 'SecretController',
    'action'     => 'show-action',
    'key'        => 'invalid_value',
)

This would lead to execution of a different controller than intended, with a value for the key parameter that bypassed the constraints outlined in the parent route.

Risk Scores
Base Score
7.5

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a high impact on the integrity of the data.

Threat Intelligence
6.9

Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.

EPSS
N/A

Probability that this vulnerability will be exploited in the wild within the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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High severity
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