CVE-2021-43099
Last modified
CVE-2021-43099 is a medium-severity vulnerability rated 4.9/10 on the CVSS scale. 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. EPSS estimates a 1.09% chance of exploitation in the next 30 days.
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).
Metrics
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Diyhi | Bbs | 5.3 |
References
- https://github.com/diyhi/bbs/issues/51Exploit, Third Party Advisory
- https://github.com/diyhi/bbs/issues/51Exploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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How Strix Helps
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