CVE-2018-12248

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Source
https://nvd.nist.gov/vuln/detail/CVE-2018-12248
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2018-12248.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2018-12248
Downstream
Published
2018-06-12T14:29:00Z
Modified
2025-10-15T09:19:03.433860Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

An issue was discovered in mruby 1.4.1. There is a heap-based buffer over-read associated with OP_ENTER because mrbgems/mruby-fiber/src/fiber.c does not extend the stack in cases of many arguments to fiber.

References

Affected packages

Git / github.com/mruby/mruby

Affected ranges

Type
GIT
Repo
https://github.com/mruby/mruby
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
778500563a9f7ceba996937dc886bd8cde29b42b

Affected versions

1.*

1.0.0
1.1.0
1.2.0
1.3.0
1.4.0
1.4.1

Database specific

vanir_signatures

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        "id": "CVE-2018-12248-57dd5406",
        "deprecated": false,
        "signature_version": "v1",
        "signature_type": "Function",
        "target": {
            "file": "mrbgems/mruby-fiber/src/fiber.c",
            "function": "fiber_switch"
        },
        "digest": {
            "function_hash": "147070256114492561439229310213750951605",
            "length": 1425.0
        },
        "source": "https://github.com/mruby/mruby/commit/778500563a9f7ceba996937dc886bd8cde29b42b"
    },
    {
        "id": "CVE-2018-12248-f67b30c9",
        "deprecated": false,
        "signature_version": "v1",
        "signature_type": "Line",
        "target": {
            "file": "mrbgems/mruby-fiber/src/fiber.c"
        },
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]