CVE-2018-18531

text/impl/DefaultTextCreator.java, text/impl/ChineseTextProducer.java, and text/impl/FiveLetterFirstNameTextCreator.java in kaptcha 2.3.2 use the Random (rather than SecureRandom) function for generating CAPTCHA values, which makes it easier for remote attackers to bypass intended access restrictions via a brute-force approach.

CVSS v3 9.8 CRITICAL
CVSS v2.0 5.0 MEDIUM

9.8^/10

CVSS v3 : CRITICAL

Vector : AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:N/C:P/I:N/A:N

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

References

Link	Resource
https://github.com/penggle/kaptcha/issues/3	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:kaptcha_project:kaptcha:2.3.2:*:*:*:*:*:*:*

History

No history.

Information

Published : 2018-10-19 20:29

Updated : 2023-12-10 12:44

NVD link : CVE-2018-18531

Mitre link : CVE-2018-18531

CVE.ORG link : CVE-2018-18531

JSON object : View

Products Affected

kaptcha_project

kaptcha

CWE

CWE-330

Use of Insufficiently Random Values

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