Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2019-18790

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
22/11/2019
Last modified:
13/05/2022

Description

An issue was discovered in channels/chan_sip.c in Sangoma Asterisk 13.x before 13.29.2, 16.x before 16.6.2, and 17.x before 17.0.1, and Certified Asterisk 13.21 before cert5. A SIP request can be sent to Asterisk that can change a SIP peer's IP address. A REGISTER does not need to occur, and calls can be hijacked as a result. The only thing that needs to be known is the peer's name; authentication details such as passwords do not need to be known. This vulnerability is only exploitable when the nat option is set to the default, or auto_force_rport.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N CVSS v3.1 Severity and Metrics:

Base Score: 6.50 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

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

Base Score 3.x
6.50
Severity 3.x
MEDIUM
Vector 2.0
AV:N/AC:M/Au:N/C:P/I:P/A:N CVSS v2.0 Severity and Metrics:

Base Score: 5.80 MEDIUM
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:N

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

Base Score 2.0
5.80
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:* 13.0.0 (including) 13.29.2 (excluding)
cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:* 16.0.0 (including) 16.6.2 (excluding)
cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:* 17.0.0 (including) 17.0.1 (excluding)
cpe:2.3:a:digium:certified_asterisk:13.21.0:*:*:*:*:*:*:*
cpe:2.3:a:digium:certified_asterisk:13.21.0:cert1:*:*:*:*:*:*
cpe:2.3:a:digium:certified_asterisk:13.21.0:cert2:*:*:*:*:*:*
cpe:2.3:a:digium:certified_asterisk:13.21.0:cert3:*:*:*:*:*:*
cpe:2.3:a:digium:certified_asterisk:13.21.0:cert4:*:*:*:*:*:*
cpe:2.3:a:digium:certified_asterisk:13.21.0:rc1:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools