CVE-2018-6789
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2018-6789
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-6789.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2018-6789
- Downstream
- Related
- Published
- 2018-02-08T23:29:01Z
- Modified
- 2025-10-14T16:32:08.249920Z
- 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.
- References
-
- http://openwall.com/lists/oss-security/2018/02/10/2
- http://packetstormsecurity.com/files/162959/Exim-base64d-Buffer-Overflow.html
- http://www.openwall.com/lists/oss-security/2018/02/07/2
- http://www.securityfocus.com/bid/103049
- http://www.securitytracker.com/id/1040461
- https://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789-en/
- https://exim.org/static/doc/security/CVE-2018-6789.txt
- https://lists.debian.org/debian-lts-announce/2018/02/msg00009.html
- https://usn.ubuntu.com/3565-1/
- https://www.debian.org/security/2018/dsa-4110
- https://www.exploit-db.com/exploits/44571/
- https://www.exploit-db.com/exploits/45671/
- https://git.exim.org/exim.git/commit/cf3cd306062a08969c41a1cdd32c6855f1abecf1
Affected packages
Git / github.com/exim/exim
Affected ranges
- Type
- GIT
- Repo
- https://github.com/exim/exim
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixed
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
list_safety_merge_proposal
exim-4.*
exim-4.90.0.22
exim-4.90.0.27
exim-4.90devstart
Database specific
{
"vanir_signatures": [
{
"signature_version": "v1",
"signature_type": "Line",
"target": {
"file": "src/src/base64.c"
},
"id": "CVE-2018-6789-73a6114c",
"digest": {
"line_hashes": [
"122224066439306498454973631177314728388",
"210469213499539750685364841753279363702",
"310130664126710556834765260497258691414",
"6805203262403384879653734729276640848",
"305471110171980478227503339989024839730",
"96132330816761905364820075878497895364",
"67183745914449294531187667849448072066"
],
"threshold": 0.9
},
"deprecated": false,
"source": "https://github.com/exim/exim/commit/062990cc1b2f9e5d82a413b53c8f0569075de700"
},
{
"signature_version": "v1",
"signature_type": "Function",
"target": {
"file": "src/src/base64.c",
"function": "b64decode"
},
"id": "CVE-2018-6789-ab775a72",
"digest": {
"length": 1076.0,
"function_hash": "277874649775681361413437847669575739043"
},
"deprecated": false,
"source": "https://github.com/exim/exim/commit/062990cc1b2f9e5d82a413b53c8f0569075de700"
}
]
}