Vulnerability · Published Mar 28, 2022 · Assigned by mitre
CVE-2021-43099
Medium 4.9
In plain English
A medium-severity security flaw in the affected software. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.1% (higher than 66% of all known vulnerabilities).
Severity (CVSS NVD)4.9Medium
Exploit odds (30 days)1.1%top 33.9% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
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).
Affected products (as reported)
References
- https://github.com/diyhi/bbs/issues/51 x_refsource_MISC