CVE-2021-34121

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Source
https://nvd.nist.gov/vuln/detail/CVE-2021-34121
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-34121.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2021-34121
Downstream
Published
2023-07-18T14:15:11.780Z
Modified
2025-11-14T11:59:20.757791Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

An Out of Bounds flaw was discovered in htmodoc 1.9.12 in function parse_tree() in toc.cxx, this possibly leads to memory layout information leaking in the data. This might be used in a chain of vulnerability in order to reach code execution.

References

Affected packages

Git / github.com/michaelrsweet/htmldoc

Affected ranges

Type
GIT
Repo
https://github.com/michaelrsweet/htmldoc
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
c67bbd8756f015e33e4ba639a40c7f9d8bd9e8ab

Affected versions

v1.*

v1.8.30
v1.9
v1.9.1
v1.9.10
v1.9.11
v1.9.12
v1.9.2
v1.9.3
v1.9.4
v1.9.5
v1.9.6
v1.9.7
v1.9.8
v1.9.9

Database specific

vanir_signatures

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        },
        "deprecated": false,
        "signature_version": "v1",
        "id": "CVE-2021-34121-0b0571b9",
        "target": {
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        "signature_type": "Line"
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        },
        "deprecated": false,
        "signature_version": "v1",
        "id": "CVE-2021-34121-36b74391",
        "target": {
            "file": "htmldoc/util.cxx"
        },
        "source": "https://github.com/michaelrsweet/htmldoc/commit/c67bbd8756f015e33e4ba639a40c7f9d8bd9e8ab",
        "signature_type": "Line"
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    {
        "digest": {
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            "length": 1671.0
        },
        "deprecated": false,
        "signature_version": "v1",
        "id": "CVE-2021-34121-6b46390f",
        "target": {
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            "function": "format_number"
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        "source": "https://github.com/michaelrsweet/htmldoc/commit/c67bbd8756f015e33e4ba639a40c7f9d8bd9e8ab",
        "signature_type": "Function"
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            "length": 5870.0
        },
        "deprecated": false,
        "signature_version": "v1",
        "id": "CVE-2021-34121-7fcb07d5",
        "target": {
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        },
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]