GHSA-mg4x-prh7-g4mx Zend-Captcha Information Disclosure and Insufficient Entropy vulnerability
Not scored
Published
Check this codebase for GHSA-mg4x-prh7-g4mx and fix it if it is affected.
What it is: GHSA-mg4x-prh7-g4mx is a vulnerability in zendframework/zend-captcha, published on 7 Jun 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of GHSA-mg4x-prh7-g4mx in the wild and no public exploit code.
Affected packages and fixed versions:
- zendframework/zend-captcha (Packagist): affected from 2.0.0; fixed in 2.4.9
- zendframework/zend-captcha (Packagist): affected from 2.0.0; fixed in 2.4.9
- zendframework/zend-captcha (Packagist): affected from 2.5.0; fixed in 2.5.2
- zendframework/zend-captcha (Packagist): affected from 2.5.0; fixed in 2.5.2
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/GHSA-mg4x-prh7-g4mx/ (Markdown: https://insights.sbomify.com/GHSA-mg4x-prh7-g4mx/index.md)
Weak random number generation in Zend-Captcha allows attackers to bypass CAPTCHA challenges and potentially 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-mg4x-prh7-g4mx?
GHSA-mg4x-prh7-g4mx is a vulnerability in zendframework/zend-captcha, 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-mg4x-prh7-g4mx?
4 open source packages ship an affected version, including zendframework/zend-captcha.
| Package | Affected | Fixed in |
|---|---|---|
zendframework/zend-captcha Packagist | From 2.0.0 | 2.4.9 |
zendframework/zend-captcha Packagist | From 2.0.0 | 2.4.9 |
zendframework/zend-captcha Packagist | From 2.5.0 | 2.5.2 |
zendframework/zend-captcha Packagist | From 2.5.0 | 2.5.2 |
How do I fix GHSA-mg4x-prh7-g4mx?
Upgrade zendframework/zend-captcha to a fixed version for your release line: 2.4.9 or 2.5.2.
Is GHSA-mg4x-prh7-g4mx being exploited?
There is no known exploitation of GHSA-mg4x-prh7-g4mx in the wild and no public exploit code.