CVE-2018-6789

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.

CVSS v3 9.8 CRITICAL
CVSS v2.0 7.5 HIGH

9.8^/10

CVSS v3 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

7.5^/10

CVSS v2.0 : HIGH

V2 Legend

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

Exploitability : 10.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
http://openwall.com/lists/oss-security/2018/02/10/2	Mailing List Third Party Advisory
http://packetstormsecurity.com/files/162959/Exim-base64d-Buffer-Overflow.html	Exploit Third Party Advisory VDB Entry
http://www.openwall.com/lists/oss-security/2018/02/07/2	Mailing List Third Party Advisory
http://www.securityfocus.com/bid/103049	Broken Link Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1040461	Broken Link Third Party Advisory VDB Entry
https://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789-en/	Exploit Third Party Advisory
https://exim.org/static/doc/security/CVE-2018-6789.txt	Vendor Advisory
https://git.exim.org/exim.git/commit/cf3cd306062a08969c41a1cdd32c6855f1abecf1	Patch
https://lists.debian.org/debian-lts-announce/2018/02/msg00009.html	Mailing List Third Party Advisory
https://usn.ubuntu.com/3565-1/	Third Party Advisory
https://www.debian.org/security/2018/dsa-4110	Mailing List Third Party Advisory
https://www.exploit-db.com/exploits/44571/	Exploit Third Party Advisory VDB Entry
https://www.exploit-db.com/exploits/45671/	Exploit Third Party Advisory VDB Entry
http://openwall.com/lists/oss-security/2018/02/10/2	Mailing List Third Party Advisory
http://packetstormsecurity.com/files/162959/Exim-base64d-Buffer-Overflow.html	Exploit Third Party Advisory VDB Entry
http://www.openwall.com/lists/oss-security/2018/02/07/2	Mailing List Third Party Advisory
http://www.securityfocus.com/bid/103049	Broken Link Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1040461	Broken Link Third Party Advisory VDB Entry
https://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789-en/	Exploit Third Party Advisory
https://exim.org/static/doc/security/CVE-2018-6789.txt	Vendor Advisory
https://git.exim.org/exim.git/commit/cf3cd306062a08969c41a1cdd32c6855f1abecf1	Patch
https://lists.debian.org/debian-lts-announce/2018/02/msg00009.html	Mailing List Third Party Advisory
https://usn.ubuntu.com/3565-1/	Third Party Advisory
https://www.debian.org/security/2018/dsa-4110	Mailing List Third Party Advisory
https://www.exploit-db.com/exploits/44571/	Exploit Third Party Advisory VDB Entry
https://www.exploit-db.com/exploits/45671/	Exploit Third Party Advisory VDB Entry

Configurations

Configuration 1 (hide)

cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR	cpe:2.3:o:debian:debian_linux:7.0:::::::*
	cpe:2.3:o:debian:debian_linux:8.0:::::::*
	cpe:2.3:o:debian:debian_linux:9.0:::::::*

Configuration 3 (hide)

OR	cpe:2.3:o:canonical:ubuntu_linux:14.04::::esm:::
	cpe:2.3:o:canonical:ubuntu_linux:16.04::::esm:::
	cpe:2.3:o:canonical:ubuntu_linux:17.10:::::::*

History

21 Nov 2024, 04:11

Type	Values Removed	Values Added
References	~~() http://openwall.com/lists/oss-security/2018/02/10/2 - Mailing List, Third Party Advisory~~	() http://openwall.com/lists/oss-security/2018/02/10/2 - Mailing List, Third Party Advisory
References	~~() http://packetstormsecurity.com/files/162959/Exim-base64d-Buffer-Overflow.html - Exploit, Third Party Advisory, VDB Entry~~	() http://packetstormsecurity.com/files/162959/Exim-base64d-Buffer-Overflow.html - Exploit, Third Party Advisory, VDB Entry
References	~~() http://www.openwall.com/lists/oss-security/2018/02/07/2 - Mailing List, Third Party Advisory~~	() http://www.openwall.com/lists/oss-security/2018/02/07/2 - Mailing List, Third Party Advisory
References	~~() http://www.securityfocus.com/bid/103049 - Broken Link, Third Party Advisory, VDB Entry~~	() http://www.securityfocus.com/bid/103049 - Broken Link, Third Party Advisory, VDB Entry
References	~~() http://www.securitytracker.com/id/1040461 - Broken Link, Third Party Advisory, VDB Entry~~	() http://www.securitytracker.com/id/1040461 - Broken Link, Third Party Advisory, VDB Entry
References	~~() https://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789-en/ - Exploit, Third Party Advisory~~	() https://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789-en/ - Exploit, Third Party Advisory
References	~~() https://exim.org/static/doc/security/CVE-2018-6789.txt - Vendor Advisory~~	() https://exim.org/static/doc/security/CVE-2018-6789.txt - Vendor Advisory
References	~~() https://git.exim.org/exim.git/commit/cf3cd306062a08969c41a1cdd32c6855f1abecf1 - Patch~~	() https://git.exim.org/exim.git/commit/cf3cd306062a08969c41a1cdd32c6855f1abecf1 - Patch
References	~~() https://lists.debian.org/debian-lts-announce/2018/02/msg00009.html - Mailing List, Third Party Advisory~~	() https://lists.debian.org/debian-lts-announce/2018/02/msg00009.html - Mailing List, Third Party Advisory
References	~~() https://usn.ubuntu.com/3565-1/ - Third Party Advisory~~	() https://usn.ubuntu.com/3565-1/ - Third Party Advisory
References	~~() https://www.debian.org/security/2018/dsa-4110 - Mailing List, Third Party Advisory~~	() https://www.debian.org/security/2018/dsa-4110 - Mailing List, Third Party Advisory
References	~~() https://www.exploit-db.com/exploits/44571/ - Exploit, Third Party Advisory, VDB Entry~~	() https://www.exploit-db.com/exploits/44571/ - Exploit, Third Party Advisory, VDB Entry
References	~~() https://www.exploit-db.com/exploits/45671/ - Exploit, Third Party Advisory, VDB Entry~~	() https://www.exploit-db.com/exploits/45671/ - Exploit, Third Party Advisory, VDB Entry

25 Jul 2024, 13:47

Type	Values Removed	Values Added
References	~~() http://packetstormsecurity.com/files/162959/Exim-base64d-Buffer-Overflow.html -~~	() http://packetstormsecurity.com/files/162959/Exim-base64d-Buffer-Overflow.html - Exploit, Third Party Advisory, VDB Entry
References	~~() http://www.securityfocus.com/bid/103049 - Third Party Advisory, VDB Entry~~	() http://www.securityfocus.com/bid/103049 - Broken Link, Third Party Advisory, VDB Entry
References	~~() http://www.securitytracker.com/id/1040461 - Third Party Advisory, VDB Entry~~	() http://www.securitytracker.com/id/1040461 - Broken Link, Third Party Advisory, VDB Entry
References	~~() https://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789-en/ - Technical Description, Third Party Advisory~~	() https://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789-en/ - Exploit, Third Party Advisory
References	~~() https://git.exim.org/exim.git/commit/cf3cd306062a08969c41a1cdd32c6855f1abecf1 - Patch, Vendor Advisory~~	() https://git.exim.org/exim.git/commit/cf3cd306062a08969c41a1cdd32c6855f1abecf1 - Patch
References	~~() https://www.debian.org/security/2018/dsa-4110 - Third Party Advisory~~	() https://www.debian.org/security/2018/dsa-4110 - Mailing List, Third Party Advisory
CWE	~~CWE-119~~	CWE-120
CPE	cpe:2.3:o:canonical:ubuntu_linux:16.04::::lts::: cpe:2.3:o:canonical:ubuntu_linux:14.04::::lts:::	cpe:2.3:o:canonical:ubuntu_linux:14.04::::esm::: cpe:2.3:o:canonical:ubuntu_linux:16.04::::esm:::

Information

Published : 2018-02-08 23:29

Updated : 2024-11-21 04:11

NVD link : CVE-2018-6789

Mitre link : CVE-2018-6789

CVE.ORG link : CVE-2018-6789

JSON object : View

Products Affected

canonical

ubuntu_linux

debian

debian_linux

exim

exim

CWE

CWE-120

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

9.8 /10