CVE-2021-23521

Public Exploit
Link Following

Description

This affects the package juce-framework/JUCE before 6.1.5. This vulnerability is triggered when a malicious archive is crafted with an entry containing a symbolic link. When extracted, the symbolic link is followed outside of the target dir allowing writing arbitrary files on the target host. In some cases, this can allow an attacker to execute arbitrary code. The vulnerable code is in the ZipFile::uncompressEntry function in juce_ZipFile.cpp and is executed when the archive is extracted upon calling uncompressTo() on a ZipFile object.

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.08%
Third-Party Advisory github.com Third-Party Advisory snyk.io
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/juce-framework/JUCE/commit/2e874e80cba0152201aff6a4d0dc407997d10a7f third party advisory patch
https://snyk.io/vuln/SNYK-UNMANAGED-JUCEFRAMEWORKJUCE-2388608 exploit third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2021-23521?
CVE-2021-23521 has been scored as a medium severity vulnerability.
How to fix CVE-2021-23521?
To fix CVE-2021-23521, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-23521 being actively exploited in the wild?
It is possible that CVE-2021-23521 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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