CVE-2020-28020

See a problem?
Please try reporting it to the source first.
Source
https://nvd.nist.gov/vuln/detail/CVE-2020-28020
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-28020.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2020-28020
Downstream
Related
Published
2021-05-06T13:15:09Z
Modified
2025-10-14T17:54:28.271609Z
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

Exim 4 before 4.92 allows Integer Overflow to Buffer Overflow, in which an unauthenticated remote attacker can execute arbitrary code by leveraging the mishandling of continuation lines during header-length restriction.

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
ae63862ba6f6ee0c17ec865cc6cf0eebb3ca2389

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_RC0
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_1
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_91
exim-4_91_RC1
exim-4_91_RC2
exim-4_91_RC3
exim-4_91_RC4
list_safety_merge_proposal

exim-4.*

exim-4.90devstart
exim-4.92-RC1
exim-4.92-RC2
exim-4.92-RC3
exim-4.92-RC4
exim-4.92-RC5

Database specific 

{
    "vanir_signatures": [
        {
            "signature_version": "v1",
            "signature_type": "Line",
            "target": {
                "file": "src/src/smtp_in.c"
            },
            "id": "CVE-2020-28020-1522f0d7",
            "digest": {
                "line_hashes": [
                    "141166236224459274535551626864839869666",
                    "174352176653700224194965995710414839471",
                    "253039306938586898545558896654873110353",
                    "195708166821209130084578053240344760208"
                ],
                "threshold": 0.9
            },
            "deprecated": false,
            "source": "https://github.com/exim/exim/commit/ae63862ba6f6ee0c17ec865cc6cf0eebb3ca2389"
        },
        {
            "signature_version": "v1",
            "signature_type": "Function",
            "target": {
                "file": "src/src/smtp_in.c",
                "function": "smtp_reset"
            },
            "id": "CVE-2020-28020-32bbe9ef",
            "digest": {
                "length": 2856.0,
                "function_hash": "24326669637228286557130795243383876882"
            },
            "deprecated": false,
            "source": "https://github.com/exim/exim/commit/ae63862ba6f6ee0c17ec865cc6cf0eebb3ca2389"
        }
    ]
}