GHSA-848f-mph5-9pm9 Zendframework Potential Information Disclosure and Insufficient Entropy vulnerability

Not scored Published

Weak random number generation in Zend Framework CAPTCHA allows attackers to bypass challenges or disclose information.

Exploited in the wild
Not known
Login needed
Not needed
Attackable
Over the internet
Victim action needed
Not needed
Fix
Available

What is GHSA-848f-mph5-9pm9?

GHSA-848f-mph5-9pm9 is a vulnerability in zendframework/zendframework1, published on 7 Jun 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In Zend Framework, Zend_Captcha_Word (v1) and Zend\Captcha\Word (v2) generate a "word" for a CAPTCHA challenge by selecting a sequence of random letters from a character set. Prior to this advisory, the selection was performed using PHP's internal array_rand() function. This function does not generate sufficient entropy due to its usage of rand() instead of more cryptographically secure methods such as openssl_pseudo_random_bytes(). This could potentially lead to information disclosure should an attacker be able to brute force the random number generation.

Which versions are affected by GHSA-848f-mph5-9pm9?

2 open source packages ship an affected version, including zendframework/zendframework1.

PackageAffectedFixed in
zendframework/zendframework1 PackagistFrom 1.12.01.12.17
zendframework/zendframework1 PackagistFrom 1.12.01.12.17

How do I fix GHSA-848f-mph5-9pm9?

Upgrade zendframework/zendframework1 to 1.12.17 or later.

Is GHSA-848f-mph5-9pm9 being exploited?

There is no known exploitation of GHSA-848f-mph5-9pm9 in the wild and no public exploit code.

Sources

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