Zip Slip Vulnerability in bbs 5.3 by the DIYHI Vendor
CVE-2021-43099

4.9MEDIUM

Key Information:

Vendor

Diyhi

Status
Bbs
Vendor
CVE Published:
28 March 2022

What is CVE-2021-43099?

The bbs 5.3 version contains an Archive Extraction vulnerability, allowing attackers to exploit the UpgradeNow function in UpgradeManageAction.java. This flaw permits the unzipping of arbitrary uploaded ZIP files without proper filename validation. By crafting a malicious archive with directory traversal sequences, an attacker could potentially overwrite existing files or introduce unauthorized executable files, leading to severe security risks for affected systems.

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References

https://github.com/diyhi/bbs/issues/51
x_refsource_MISC

CVSS V3.1

Score:
4.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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