Multiple vulnerabilities in LifterLMS



Published: 2019-09-09
Risk High
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2019-15896
CWE-ID CWE-601
CWE-284
CWE-269
Exploitation vector Network
Public exploit Public exploit code for vulnerability #2 is available.
Public exploit code for vulnerability #3 is available.
Vulnerable software
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LifterLMS
Web applications / Modules and components for CMS

Vendor LifterLMS

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Open redirect

EUVDB-ID: #VU20939

Risk: Medium

CVSSv3.1: 4.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')

Exploit availability: No

Description

The vulnerability allows a remote attacker to redirect victims to arbitrary URL.

The vulnerability exists due to improper sanitization of user-supplied data. A remote attacker can create a link that leads to a trusted website via the “Location:” header, however, when clicked, redirects the victim to arbitrary domain.

Successful exploitation of this vulnerability may allow a remote attacker to perform a phishing attack and steal potentially sensitive information.

Note: This vulnerability exists due to the CVE-2019-15896 issue described above.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

LifterLMS: 3.5.3 - 3.34.5

External links

http://blog.nintechnet.com/critical-vulnerability-fixed-in-wordpress-lifterlms-plugin/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Improper access control

EUVDB-ID: #VU20940

Risk: High

CVSSv3.1: 8.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote attacker to create an administrator account.

The vulnerability exists in the "get_author_id" function in the “includes/class.llms.generator.php” script due to the plugin will automatically create the corresponding administrator account if it cannot retrieve the user ID and email address of the author of the courses in the imported payload. A random administrator password is created by using the "wp_generate_password" function. A remote attacker can click on the login page “Lost your password” link and change the password.  

Note: This vulnerability exists due to the CVE-2019-15896 issue described above.




Mitigation

Install updates from vendor's website.

Vulnerable software versions

LifterLMS: 3.6.2 - 3.34.5

External links

http://blog.nintechnet.com/critical-vulnerability-fixed-in-wordpress-lifterlms-plugin/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.

3) Improper Privilege Management

EUVDB-ID: #VU20938

Risk: High

CVSSv3.1: 8.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2019-15896

CWE-ID: CWE-269 - Improper Privilege Management

Exploit availability: No

Description

The vulnerability allows a remote attacker to unauthenticated options import to the target system.

The vulnerability exists in the main “lifterlms.php” script due to the plugin loads several scripts when the back-end is accessed, either by an authenticated or unauthenticated user (it simply relies on the "is_admin" function). A remote attacker can import a malicious JSON encoded payload. 

Note: An attacker can leverage this vulnerability to perform several critical attacks.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

LifterLMS: 3.5.3 - 3.34.5

External links

http://blog.nintechnet.com/critical-vulnerability-fixed-in-wordpress-lifterlms-plugin/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.



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