CVE-2018-6789

critical
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Description

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

https://exim.org/static/doc/security/CVE-2018-6789.txt

http://www.openwall.com/lists/oss-security/2018/02/07/2

https://www.debian.org/security/2018/dsa-4110

https://lists.debian.org/debian-lts-announce/2018/02/msg00009.html

https://git.exim.org/exim.git/commit/cf3cd306062a08969c41a1cdd32c6855f1abecf1

http://openwall.com/lists/oss-security/2018/02/10/2

http://www.securityfocus.com/bid/103049

https://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789-en/

http://www.securitytracker.com/id/1040461

https://usn.ubuntu.com/3565-1/

https://www.exploit-db.com/exploits/44571/

https://www.exploit-db.com/exploits/45671/

http://packetstormsecurity.com/files/162959/Exim-base64d-Buffer-Overflow.html

Details

Source: MITRE

Published: 2018-02-08

Updated: 2021-06-03

Type: CWE-119

Risk Information

CVSS v2

Base Score: 7.5

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

Impact Score: 6.4

Exploitability Score: 10

Severity: HIGH

CVSS v3

Base Score: 9.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Impact Score: 5.9

Exploitability Score: 3.9

Severity: CRITICAL

Tenable Plugins

View all (11 total)

IDNameProductFamilySeverity
149614openSUSE Security Update : exim (openSUSE-2021-677) (Stack Clash)NessusSuSE Local Security Checks
critical
107241Amazon Linux AMI : exim (ALAS-2018-970)NessusAmazon Linux Local Security Checks
critical
107178GLSA-201803-01 : Exim: Multiple vulnerabilitiesNessusGentoo Local Security Checks
critical
700223Exim < 4.90.1 Remote Code ExecutionNessus Network MonitorSMTP Servers
high
107149Exim < 4.90.1 Buffer Overflow RCE VulnerabilityNessusSMTP problems
critical
107009Fedora 27 : exim (2018-5aec14e125)NessusFedora Local Security Checks
critical
107007Fedora 26 : exim (2018-25a7ba3cb6)NessusFedora Local Security Checks
critical
106888openSUSE Security Update : exim (openSUSE-2018-170)NessusSuSE Local Security Checks
critical
106791Ubuntu 14.04 LTS / 16.04 LTS / 17.10 : exim4 vulnerability (USN-3565-1)NessusUbuntu Local Security Checks
critical
106728Debian DSA-4110-1 : exim4 - security updateNessusDebian Local Security Checks
critical
106722Debian DLA-1274-1 : exim4 security updateNessusDebian Local Security Checks
critical