Moodle up to 9.49 PostScript Parser execution code injection

Summaryinfo

A vulnerability labeled as critical has been found in Moodle up to 9.49. This affects an unknown part of the component PostScript Parser. Such manipulation of the argument execution leads to code injection. This vulnerability is listed as CVE-2022-35649. The attack may be performed from remote. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Moodle up to 9.49 (Learning Management Software) and classified as critical. Affected by this issue is an unknown part of the component PostScript Parser. The manipulation of the argument execution with an unknown input leads to a code injection vulnerability. Using CWE to declare the problem leads to CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. Impacted is confidentiality, integrity, and availability. CVE summarizes:

The vulnerability was found in Moodle, occurs due to improper input validation when parsing PostScript code. An omitted execution parameter results in a remote code execution risk for sites running GhostScript versions older than 9.50. Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

The weakness was presented 07/26/2022. The advisory is available at git.moodle.org. This vulnerability is handled as CVE-2022-35649 since 07/12/2022. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1059 by the MITRE ATT&CK project.

Upgrading to version 9.50 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.moodle.org. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Type

• Learning Management Software

Name

• Moodle

Version

• 9.0
• 9.1
• 9.2
• 9.3
• 9.4
• 9.5
• 9.6
• 9.7
• 9.8
• 9.9
• 9.10
• 9.11
• 9.12
• 9.13
• 9.14
• 9.15
• 9.16
• 9.17
• 9.18
• 9.19
• 9.20
• 9.21
• 9.22
• 9.23
• 9.24
• 9.25
• 9.26
• 9.27
• 9.28
• 9.29
• 9.30
• 9.31
• 9.32
• 9.33
• 9.34
• 9.35
• 9.36
• 9.37
• 9.38
• 9.39
• 9.40
• 9.41
• 9.42
• 9.43
• 9.44
• 9.45
• 9.46
• 9.47
• 9.48
• 9.49

License

• open-source

Website

• Product: https://moodle.org/

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