CVE-2020-7247

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Source
https://nvd.nist.gov/vuln/detail/CVE-2020-7247
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-7247.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2020-7247
Downstream
Published
2020-01-29T16:15:12Z
Modified
2025-10-23T04:32:22Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

smtpmailaddr in smtpsession.c in OpenSMTPD 6.6, as used in OpenBSD 6.6 and other products, allows remote attackers to execute arbitrary commands as root via a crafted SMTP session, as demonstrated by shell metacharacters in a MAIL FROM field. This affects the "uncommented" default configuration. The issue exists because of an incorrect return value upon failure of input validation.

References

Affected packages

Git / github.com/openbsd/src

Affected ranges

Type
GIT
Repo
https://github.com/openbsd/src
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
9dcfda045474d8903224d175907bfc29761dcb45

Database specific

vanir_signatures

[
    {
        "source": "https://github.com/openbsd/src/commit/9dcfda045474d8903224d175907bfc29761dcb45",
        "target": {
            "file": "usr.sbin/smtpd/smtp_session.c"
        },
        "digest": {
            "line_hashes": [
                "146958479146620846539546414962359749417",
                "145804354479718942648469601420943504881",
                "50866359851508526042491977853727488282",
                "207177037661277233987566775936640071114",
                "256454692897472681432177734798303501079",
                "333579557200389565105833963070610317524",
                "151964549180595370813610698553145369373",
                "164042760444352403035042736481382744972",
                "157779360057984813910033772595342582972",
                "128067893643618281774819757885083806704",
                "92864325646592764248353712193035702172",
                "80056390225257104560475256115545599826",
                "33586722040586328695311359832171375475",
                "116533349178807723563281035809734756036",
                "319598776653868670885544067356391424772",
                "134792771592966456779690561609829698813",
                "43264858727266399511000037806169423068"
            ],
            "threshold": 0.9
        },
        "deprecated": false,
        "id": "CVE-2020-7247-1439a3f1",
        "signature_version": "v1",
        "signature_type": "Line"
    },
    {
        "source": "https://github.com/openbsd/src/commit/9dcfda045474d8903224d175907bfc29761dcb45",
        "target": {
            "function": "smtp_mailaddr",
            "file": "usr.sbin/smtpd/smtp_session.c"
        },
        "digest": {
            "function_hash": "81829132623799367638487615930946742238",
            "length": 902.0
        },
        "deprecated": false,
        "id": "CVE-2020-7247-ba7fc816",
        "signature_version": "v1",
        "signature_type": "Function"
    }
]