CVE-2018-6789

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Source
https://cve.org/CVERecord?id=CVE-2018-6789
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2018-6789.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2018-6789
Downstream
Related
Published
2018-02-08T23:29:01.170Z
Modified
2026-04-11T21:33:04.193533Z
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

An issue was discovered in the base64d function in the SMTP listener in Exim before 4.90.1. By sending a handcrafted message, a buffer overflow may happen. This can be used to execute code remotely.

Database specific 
{
    "unresolved_ranges": [
        {
            "cpe": "cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*",
            "source": "CPE_FIELD",
            "extracted_events": [
                {
                    "last_affected": "14.04"
                }
            ]
        },
        {
            "cpe": "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*",
            "source": "CPE_FIELD",
            "extracted_events": [
                {
                    "last_affected": "16.04"
                }
            ]
        },
        {
            "cpe": "cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*",
            "source": "CPE_FIELD",
            "extracted_events": [
                {
                    "last_affected": "17.10"
                }
            ]
        },
        {
            "cpe": "cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*",
            "source": "CPE_FIELD",
            "extracted_events": [
                {
                    "last_affected": "7.0"
                }
            ]
        },
        {
            "cpe": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*",
            "source": "CPE_FIELD",
            "extracted_events": [
                {
                    "last_affected": "8.0"
                }
            ]
        },
        {
            "cpe": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",
            "source": "CPE_FIELD",
            "extracted_events": [
                {
                    "last_affected": "9.0"
                }
            ]
        }
    ]
}
References

Affected packages

Git / github.com/exim/exim

Affected ranges

Type
GIT
Repo
https://github.com/exim/exim
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
062990cc1b2f9e5d82a413b53c8f0569075de700
Database specific 
{
    "cpe": "cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:*",
    "source": "CPE_FIELD",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "4.90.1"
        }
    ]
}

Affected versions

Other
DEVEL_PDKIM_START
exim-4_50
exim-4_51
exim-4_52
exim-4_53
exim-4_54
exim-4_61
exim-4_62
exim-4_63
exim-4_64
exim-4_65
exim-4_66
exim-4_67
exim-4_68
exim-4_69
exim-4_70
exim-4_70_RC3
exim-4_70_RC4
exim-4_71
exim-4_72
exim-4_72_RC1
exim-4_72_RC2
exim-4_73
exim-4_73_RC00
exim-4_73_RC1
exim-4_74
exim-4_74_RC1
exim-4_75
exim-4_75_RC1
exim-4_75_RC2
exim-4_75_RC3
exim-4_76
exim-4_76_RC1
exim-4_76_RC2
exim-4_77
exim-4_77_RC1
exim-4_77_RC2
exim-4_77_RC3
exim-4_77_RC4
exim-4_80
exim-4_80_RC1
exim-4_80_RC2
exim-4_80_RC3
exim-4_80_RC4
exim-4_80_RC5
exim-4_80_RC6
exim-4_80_RC7
exim-4_82
exim-4_82_RC1
exim-4_82_RC2
exim-4_82_RC3
exim-4_82_RC4
exim-4_82_RC5
exim-4_83
exim-4_83_RC1
exim-4_83_RC2
exim-4_83_RC3
exim-4_84
exim-4_84_RC1
exim-4_84_RC2
exim-4_85
exim-4_85_RC1
exim-4_85_RC2
exim-4_85_RC3
exim-4_85_RC4
exim-4_86
exim-4_86_RC1
exim-4_86_RC2
exim-4_86_RC3
exim-4_86_RC4
exim-4_86_RC5
exim-4_87
exim-4_87_RC1
exim-4_87_RC2
exim-4_87_RC3
exim-4_87_RC4
exim-4_87_RC5
exim-4_87_RC6
exim-4_87_RC7
exim-4_88
exim-4_88_RC1
exim-4_88_RC2
exim-4_88_RC3
exim-4_88_RC4
exim-4_88_RC5
exim-4_88_RC6
exim-4_89_RC1
exim-4_89_RC3
exim-4_90
exim-4_90_RC1
exim-4_90_RC2
exim-4_90_RC3
exim-4_90_RC4
exim-4.*
exim-4.90.0.22
exim-4.90.0.27
exim-4.90devstart

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2018-6789.json"
vanir_signatures_modified 
"2026-04-11T21:33:04Z"
vanir_signatures 
[
    {
        "signature_type": "Line",
        "id": "CVE-2018-6789-73a6114c",
        "signature_version": "v1",
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "122224066439306498454973631177314728388",
                "210469213499539750685364841753279363702",
                "310130664126710556834765260497258691414",
                "6805203262403384879653734729276640848",
                "305471110171980478227503339989024839730",
                "96132330816761905364820075878497895364",
                "67183745914449294531187667849448072066"
            ],
            "threshold": 0.9
        },
        "target": {
            "file": "src/src/base64.c"
        },
        "source": "https://github.com/exim/exim/commit/062990cc1b2f9e5d82a413b53c8f0569075de700"
    },
    {
        "signature_type": "Function",
        "id": "CVE-2018-6789-ab775a72",
        "signature_version": "v1",
        "deprecated": false,
        "digest": {
            "function_hash": "277874649775681361413437847669575739043",
            "length": 1076.0
        },
        "target": {
            "file": "src/src/base64.c",
            "function": "b64decode"
        },
        "source": "https://github.com/exim/exim/commit/062990cc1b2f9e5d82a413b53c8f0569075de700"
    }
]