// For flags

CVE-2021-43099

 

Severity Score

4.9
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

1
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

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).

Se presenta una vulnerabilidad de extracción de archivos (también se conoce como "Zip Slip") en bbs versión 5.3, en la función UpgradeNow en el archivo UpgradeManageAction.java, que descomprime el archivo zip arbitrario subido sin comprobar los nombres de los archivos. La vulnerabilidad es explotada usando un archivo especialmente diseñado que contiene nombres de archivo de navegación de directorios (por ejemplo, ../../evil.exe)

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None
Attack Vector
Network
Attack Complexity
Low
Authentication
Single
Confidentiality
None
Integrity
Partial
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-11-01 CVE Reserved
  • 2022-03-28 CVE Published
  • 2024-08-04 CVE Updated
  • 2024-08-04 First Exploit
  • 2024-12-17 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CAPEC
References (1)
URL Tag Source
URL Date SRC
https://github.com/diyhi/bbs/issues/51 2024-08-04
URL Date SRC
URL Date SRC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Diyhi
Search vendor "Diyhi"
Bbs
Search vendor "Diyhi" for product "Bbs"
5.3
Search vendor "Diyhi" for product "Bbs" and version "5.3"
-
Affected