National Vulnerability Database

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    Vulnerabilities Detail

CVE-2018-6789 Detail

Current 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.

Source:  MITRE
Description Last Modified:  02/11/2018
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 9.8 CRITICAL
Vector: AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H (V3 legend)
Impact Score: 5.9
Exploitability Score: 3.9

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

CVSS v2.0 Severity and Metrics:

Base Score: 7.5 HIGH
Vector: (AV:N/AC:L/Au:N/C:P/I:P/A:P) (V2 legend)
Impact Subscore: 6.4
Exploitability Subscore: 10.0

Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (AU): None
Confidentiality (C): Partial
Integrity (I): Partial
Availability (A): Partial
Additional Information:
Allows unauthorized disclosure of information
Allows unauthorized modification
Allows disruption of service

References to Advisories, Solutions, and Tools

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

Technical Details

Vulnerability Type (View All)

Change History

8 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2018-6789
NVD Published Date:
02/08/2018
NVD Last Modified:
10/26/2018