CVE-2017-17850

Severity CVSS v4.0:

Pending analysis

Type:

CWE-20 Input Validation

Publication date:

27/12/2017

Last modified:

20/04/2025

Description

An issue was discovered in Asterisk 13.18.4 and older, 14.7.4 and older, 15.1.4 and older, and 13.18-cert1 and older. A select set of SIP messages create a dialog in Asterisk. Those SIP messages must contain a contact header. For those messages, if the header was not present and the PJSIP channel driver was used, Asterisk would crash. The severity of this vulnerability is somewhat mitigated if authentication is enabled. If authentication is enabled, a user would have to first be authorized before reaching the crash point.

Impact

Vector 3.x

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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

Base Score 3.x

7.50

Severity 3.x

HIGH

Vector 2.0

AV:N/AC:L/Au:N/C:N/I:N/A:P CVSS v2.0 Severity and Metrics:

Base Score: 5.00 MEDIUM
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Physical

Base Score 2.0

5.00

Severity 2.0

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:digium:asterisk::::::::	13.0.0 (including)	13.18.4 (including)
cpe:2.3:a:digium:asterisk::::::::	14.0.0 (including)	14.7.4 (including)
cpe:2.3:a:digium:asterisk::::::::	15.0.0 (including)	15.1.4 (including)
cpe:2.3:a:digium:certified_asterisk:13.1.0:::::::*
cpe:2.3:a:digium:certified_asterisk:13.1.0:rc1::::::
cpe:2.3:a:digium:certified_asterisk:13.1.0:rc2::::::
cpe:2.3:a:digium:certified_asterisk:13.8:cert1::::::

To consult the complete list of CPE names with products and versions, see this page

CVE-2017-17850

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools