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.

References

Affected packages

Git / github.com/albertodemichelis/squirrel

Affected ranges

Type: GIT
Repo: https://github.com/albertodemichelis/squirrel
Events: Introduced

0 Unknown introduced commit / All previous commits are affected

Fixed

23a0620658714b996d20da3d4dd1a0dcf9b0bd98

Type: GIT
Repo: https://github.com/albertodemichelis/squirrel
Events: Introduced

0 Unknown introduced commit / All previous commits are affected

Fixed

23a0620658714b996d20da3d4dd1a0dcf9b0bd98

Affected versions

v3.*

v3.1

Database specific

unresolved_ranges

[
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "2.2.5"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "3.0"
            },
            {
                "last_affected": "3.1"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "35"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "36"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "2.2.5"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "3.x"
            },
            {
                "last_affected": "3.1"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "video"
            }
        ]
    }
]

vanir_signatures

[
    {
        "signature_version": "v1",
        "target": {
            "function": "SQClass::NewSlot",
            "file": "squirrel/sqclass.cpp"
        },
        "digest": {
            "length": 1327.0,
            "function_hash": "218714802154936925267298589577355166457"
        },
        "source": "https://github.com/albertodemichelis/squirrel/commit/23a0620658714b996d20da3d4dd1a0dcf9b0bd98",
        "signature_type": "Function",
        "id": "CVE-2021-41556-7378500a",
        "deprecated": false
    },
    {
        "signature_version": "v1",
        "target": {
            "file": "squirrel/sqclass.cpp"
        },
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "92675059631009288048213461542740346520",
                "296186921292990067100642253571993597728",
                "40872597398596125545265975713465823595",
                "178672236382474547461178361631356191776"
            ]
        },
        "source": "https://github.com/albertodemichelis/squirrel/commit/23a0620658714b996d20da3d4dd1a0dcf9b0bd98",
        "signature_type": "Line",
        "id": "CVE-2021-41556-ed2333f9",
        "deprecated": false
    }
]

source

"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-41556.json"