CVE-2020-35679

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Source
https://cve.org/CVERecord?id=CVE-2020-35679
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-35679.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2020-35679
Downstream
Published
2020-12-24T16:15:15.537Z
Modified
2026-07-08T19:44:09.783440Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

smtpd/table.c in OpenSMTPD before 6.8.0p1 lacks a certain regfree, which might allow attackers to trigger a "very significant" memory leak via messages to an instance that performs many regex lookups.

Database specific 
{
    "unresolved_ranges": [
        {
            "cpes": [
                "cpe:2.3:a:opensmtpd:opensmtpd:*:*:*:*:*:*:*:*"
            ],
            "extracted_events": [
                {
                    "fixed": "6.8.0"
                }
            ],
            "vendor_product": "opensmtpd:opensmtpd",
            "source": "CPE_RANGE"
        },
        {
            "cpes": [
                "cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*",
                "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*"
            ],
            "extracted_events": [
                {
                    "introduced": "32"
                },
                {
                    "last_affected": "32"
                },
                {
                    "introduced": "33"
                },
                {
                    "last_affected": "33"
                }
            ],
            "vendor_product": "fedoraproject:fedora",
            "source": "CPE_STRING"
        },
        {
            "cpes": [
                "cpe:2.3:a:opensmtpd:opensmtpd:6.8.0:-:*:*:*:*:*:*"
            ],
            "extracted_events": [
                {
                    "introduced": "6.8.0-NA"
                },
                {
                    "last_affected": "6.8.0-NA"
                }
            ],
            "vendor_product": "opensmtpd:opensmtpd",
            "source": "CPE_STRING"
        }
    ]
}
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
79a034b4aed29e965f45a13409268290c9910043
Database specific 
{
    "source": "REFERENCES"
}

Database specific

vanir_signatures_modified 
"2026-07-08T19:44:09Z"
vanir_signatures 
[
    {
        "target": {
            "function": "table_regex_match",
            "file": "usr.sbin/smtpd/table.c"
        },
        "id": "CVE-2020-35679-421b970c",
        "digest": {
            "function_hash": "168689518179268419596766045625718440344",
            "length": 339.0
        },
        "deprecated": false,
        "signature_version": "v1",
        "signature_type": "Function",
        "source": "https://github.com/openbsd/src/commit/79a034b4aed29e965f45a13409268290c9910043"
    },
    {
        "target": {
            "file": "usr.sbin/smtpd/table.c"
        },
        "id": "CVE-2020-35679-5a6fe561",
        "digest": {
            "line_hashes": [
                "146958479146620846539546414962359749417",
                "174238863999032206833938270702635942721",
                "44785742247042273354110454623155296066",
                "127216323636994152709344313176629631861",
                "187410313179494707880442132910442894268",
                "89120246498674166041645836356303474481",
                "288075783481391649782432310671824278932",
                "182156094449615294796588709903363808016",
                "172972714128338031501639908038510339649"
            ],
            "threshold": 0.9
        },
        "deprecated": false,
        "signature_version": "v1",
        "signature_type": "Line",
        "source": "https://github.com/openbsd/src/commit/79a034b4aed29e965f45a13409268290c9910043"
    }
]
source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-35679.json"

Git / github.com/opensmtpd/opensmtpd

Affected ranges

Type
GIT
Repo
https://github.com/opensmtpd/opensmtpd
Events
Introduced
b9e207ab4e42dff36a56e0b32d67f5c50e4f63fb
Last affected
b9e207ab4e42dff36a56e0b32d67f5c50e4f63fb
Database specific 
{
    "cpe": "cpe:2.3:a:opensmtpd:opensmtpd:6.8.0:patch1-rc1:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "6.8.0-patch1\\-rc1"
        },
        {
            "last_affected": "6.8.0-patch1\\-rc1"
        }
    ],
    "source": "CPE_STRING"
}

Affected versions

6.*
6.8.0-patch1\-rc1
6.8.0p1-rc1
opensmtpd-6.*
opensmtpd-6.8.0p1-rc1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-35679.json"