Multiple vulnerabilities in Moodle

1) Improper access control

EUVDB-ID: #VU19212

Risk: Low

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-10187

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote attacker to delete glossary entries.

The vulnerability exists due to improper access restrictions when deleting glossary entries. A remote authenticated attacker can delete arbitrary entries from glossaries that do not belong to the user.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Moodle: 3.0.0 beta - 3.7.0

CPE2.3

• cpe:2.3:a:moodle_org:moodle:3.0.10:*:*:*:*:*:*:*
• cpe:2.3:a:moodle_org:moodle:3.1.18:*:*:*:*:*:*:*
• cpe:2.3:a:moodle_org:moodle:3.2.9:*:*:*:*:*:*:*
• cpe:2.3:a:moodle_org:moodle:3.3.9:*:*:*:*:*:*:*
• cpe:2.3:a:moodle_org:moodle:3.4.9:*:*:*:*:*:*:*
• cpe:2.3:a:moodle_org:moodle:3.5.6:*:*:*:*:*:*:*
• cpe:2.3:a:moodle_org:moodle:3.6.4:*:*:*:*:*:*:*
• cpe:2.3:a:moodle_org:moodle:3.7.0:*:*:*:*:*:*:*

External links

https://moodle.org/mod/forum/discuss.php?d=388568

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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

2) Cross-site request forgery

EUVDB-ID: #VU19211

Risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-10186

CWE-ID: CWE-352 - Cross-Site Request Forgery (CSRF)

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform cross-site request forgery attacks.

The vulnerability exists due to insufficient validation of the HTTP request origin when loading or unloading XML files. A remote attacker can trick the victim to visit a specially crafted web page and load or unload arbitrary XML files on behalf of the victim on the vulnerable website.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Moodle: 3.0.0 beta - 3.7.0

CPE2.3

External links

https://moodle.org/mod/forum/discuss.php?d=388567

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.

3) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU19213

Risk: Low

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-10188

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote authenticated user to change group permissions.

The vulnerability exists due to incorrect handling of group membership rights. A remote authenticated teacher in a quiz group can modify group overrides for other groups in the same quiz.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Moodle: 3.0.0 beta - 3.7.0

CPE2.3

External links

https://moodle.org/mod/forum/discuss.php?d=388569

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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

4) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU19214

Risk: Low

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-10189

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote authenticated user to change group permissions.

The vulnerability exists due to incorrect handling of group membership rights. A remote authenticated teacher in an assignment group can modify group overrides for other groups in the same assignment

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Moodle: 3.0.0 beta - 3.7.0

CPE2.3

External links

https://moodle.org/mod/forum/discuss.php?d=388570

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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

5) Deserialization of Untrusted Data

EUVDB-ID: #VU18050

Risk: High

CVSSv4.0: 8.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber]

CVE-ID: CVE-2018-17057

CWE-ID: CWE-502 - Deserialization of Untrusted Data

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to insecure input validation when processing serialized data passed via the phar:// wrapper. A remote attacker can pass specially crafted data to the application and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install the latest version from vendor's website that fixes the issue with vulnerable third-party tcppdf library.

Vulnerable software versions

Moodle: 3.0.0 beta - 3.7.0

CPE2.3

External links

https://moodle.org/mod/forum/discuss.php?d=388571

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.