Vulnerability Details CVE-2021-41556
sqclass.cpp in Squirrel through 2.2.5 and 3.x through 3.1 allows an out-of-bounds read (in the core interpreter) that can lead to Code Execution. If a victim executes an attacker-controlled squirrel script, it is possible for the attacker to break out of the squirrel script sandbox even if all dangerous functionality such as File System functions has been disabled. An attacker might abuse this bug to target (for example) Cloud services that allow customization via SquirrelScripts, or distribute malware through video games that embed a Squirrel Engine.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 61.1%
CVSS Severity
CVSS v3 Score 10.0
References
- http://www.squirrel-lang.org/#download
- https://blog.sonarsource.com/squirrel-vm-sandbox-escape/
- https://github.com/albertodemichelis/squirrel/commit/23a0620658714b996d20da3d4dd1a0dcf9b0bd98
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BV7SJJ44AGAX4ILIVPREIXPJ2GOG3FKV/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M3FQILX7UUEERSDPMZP3MKGTMY2E7ESU/
- http://www.squirrel-lang.org/#download
- https://blog.sonarsource.com/squirrel-vm-sandbox-escape/
- https://github.com/albertodemichelis/squirrel/commit/23a0620658714b996d20da3d4dd1a0dcf9b0bd98
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BV7SJJ44AGAX4ILIVPREIXPJ2GOG3FKV/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M3FQILX7UUEERSDPMZP3MKGTMY2E7ESU/
Products affected by CVE-2021-41556
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cpe:2.3:a:squirrel-lang:squirrel:2.0
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cpe:2.3:a:squirrel-lang:squirrel:2.0.1
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cpe:2.3:a:squirrel-lang:squirrel:2.0.2
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cpe:2.3:a:squirrel-lang:squirrel:2.0.3
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cpe:2.3:a:squirrel-lang:squirrel:2.0.4
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cpe:2.3:a:squirrel-lang:squirrel:2.0.5
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cpe:2.3:a:squirrel-lang:squirrel:2.1
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cpe:2.3:a:squirrel-lang:squirrel:2.1.1
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cpe:2.3:a:squirrel-lang:squirrel:2.1.2
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cpe:2.3:a:squirrel-lang:squirrel:2.2
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cpe:2.3:a:squirrel-lang:squirrel:2.2.1
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cpe:2.3:a:squirrel-lang:squirrel:2.2.2
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cpe:2.3:a:squirrel-lang:squirrel:2.2.3
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cpe:2.3:a:squirrel-lang:squirrel:2.2.4
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cpe:2.3:a:squirrel-lang:squirrel:2.2.5
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cpe:2.3:a:squirrel-lang:squirrel:3.0
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cpe:2.3:a:squirrel-lang:squirrel:3.0.5
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cpe:2.3:a:squirrel-lang:squirrel:3.0.6
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cpe:2.3:a:squirrel-lang:squirrel:3.0.7
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cpe:2.3:a:squirrel-lang:squirrel:3.1
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cpe:2.3:o:fedoraproject:fedora:35
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cpe:2.3:o:fedoraproject:fedora:36