Vulnerability CVE-2018-18956

Vulnerability Name:

CVE-2018-18956 (CCN-152612)

Assigned:

2018-11-05

Published:

2018-11-05

Updated:

2020-08-24

Summary:

The ProcessMimeEntity function in util-decode-mime.c in Suricata 4.x before 4.0.6 allows remote attackers to cause a denial of service (segfault and daemon crash) via crafted input to the SMTP parser, as exploited in the wild in November 2018.

CVSS v3 Severity:

7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)

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

5.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
4.6 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C)

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

CVSS v2 Severity:

5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Authentication (Au): None
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Partial

5.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Athentication (Au): None
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Partial

Vulnerability Type:

CWE-119

Vulnerability Consequences:

Denial of Service

References:

Source: MITRE
Type: CNA
CVE-2018-18956

Source: XF
Type: UNKNOWN
suricata-cve201818956-dos(152612)

Source: CONFIRM
Type: Mailing List, Third Party Advisory
https://lists.openinfosecfoundation.org/pipermail/oisf-users/2018-November/016316.html

Source: MISC
Type: Mailing List, Third Party Advisory
https://lists.openinfosecfoundation.org/pipermail/oisf-users/2018-October/016227.html

Source: CCN
Type: Bug #2658
smtp segmentation fault (4.0.x)

Source: MISC
Type: Third Party Advisory
https://redmine.openinfosecfoundation.org/issues/2658#change-10374

Source: CCN
Type: Suricata Web site
Suricata

Vulnerable Configuration:

Configuration 1:

cpe:/a:suricata-ids:suricata:*:*:*:*:*:*:*:* (Version >= 4.0.0 and < 4.0.6)

Denotes that component is vulnerable

Oval Definitions

Definition ID	Class	Title	Last Modified
oval:com.ubuntu.disco:def:2018189560000000	V	CVE-2018-18956 on Ubuntu 19.04 (disco) - medium.	2018-11-05
oval:com.ubuntu.bionic:def:201818956000	V	CVE-2018-18956 on Ubuntu 18.04 LTS (bionic) - medium.	2018-11-05
oval:com.ubuntu.cosmic:def:2018189560000000	V	CVE-2018-18956 on Ubuntu 18.10 (cosmic) - medium.	2018-11-05
oval:com.ubuntu.cosmic:def:201818956000	V	CVE-2018-18956 on Ubuntu 18.10 (cosmic) - medium.	2018-11-05
oval:com.ubuntu.bionic:def:2018189560000000	V	CVE-2018-18956 on Ubuntu 18.04 LTS (bionic) - medium.	2018-11-05
oval:com.ubuntu.trusty:def:201818956000	V	CVE-2018-18956 on Ubuntu 14.04 LTS (trusty) - medium.	2018-11-05
oval:com.ubuntu.xenial:def:2018189560000000	V	CVE-2018-18956 on Ubuntu 16.04 LTS (xenial) - medium.	2018-11-05
oval:com.ubuntu.xenial:def:201818956000	V	CVE-2018-18956 on Ubuntu 16.04 LTS (xenial) - medium.	2018-11-05

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