CVE-2021-43099 Path traversal in n/a
Attackers can execute arbitrary code by uploading a crafted zip file with directory traversal filenames during the upgrade process.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-43099?
CVE-2021-43099 is a medium-severity path traversal vulnerability in n/a, published on 28 Mar 2022. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
An Archive Extraction (AKA "Zip Slip) vulnerability exists in bbs 5.3 in the UpgradeNow function in UpgradeManageAction.java, which unzips the arbitrary upladed zip file without checking filenames. The vulnerability is exploited using a specially crafted archive that holds directory traversal filenames (e.g. ../../evil.exe).
Weakness: CWE-22
Which versions are affected by CVE-2021-43099?
It affects 1 product.
Products include Diyhi Bbs.
How do I fix CVE-2021-43099?
No fix has been published for CVE-2021-43099 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2021-43099 being exploited?
There is no known exploitation of CVE-2021-43099 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-g5mc-2cpg-f638.