CVE-2021-4463: Path Traversal

Description

Longjing Technology BEMS API versions up to and including 1.21 contains an unauthenticated arbitrary file download vulnerability in the 'downloads' endpoint. The 'fileName' parameter is not properly sanitized, allowing attackers to craft traversal sequences and access sensitive files outside the intended directory.

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Weakness Type (CWE)

CWE-22 Path Traversal

CWE-552 CWE-552

References

Other References

https://cxsecurity.com/issue/WLB-2021070173 https://exchange.xforce.ibmcloud.com/vulnerabilities/206477 https://packetstormsecurity.com/files/163702 https://web.archive.org/web/20220527162453/http://www.ljkj2012.com/ https://www.exploit-db.com/exploits/50163 https://www.vulncheck.com/advisories/longjing-technology-bems-api-remote-arbitrary-file-download https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5657.php

Frequently Asked Questions

What is CVE-2021-4463? +

Longjing Technology BEMS API versions up to and including 1.21 contains an unauthenticated arbitrary file download vulnerability in the 'downloads' endpoint. The 'fileName' parameter is not properly sanitized, allowing attackers to craft traversal sequences and access sensitive files outside the intended directory.

How do I check if I'm vulnerable to CVE-2021-4463? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2021-4463