CVE-2018-6789 Information

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.

CVSS Vector

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

Reference

http://openwall.com/lists/oss-security/2018/02/10/2 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://git.exim.org/exim.git/commit/cf3cd306062a08969c41a1cdd32c6855f1abecf1 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/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8