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

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CVE-2019-13161

Severity CVSS v4.0:
Pending analysis
Type:
CWE-476 NULL Pointer Dereference
Publication date:
12/07/2019
Last modified:
01/06/2022

Description

An issue was discovered in Asterisk Open Source through 13.27.0, 14.x and 15.x through 15.7.2, and 16.x through 16.4.0, and Certified Asterisk through 13.21-cert3. A pointer dereference in chan_sip while handling SDP negotiation allows an attacker to crash Asterisk when handling an SDP answer to an outgoing T.38 re-invite. To exploit this vulnerability an attacker must cause the chan_sip module to send a T.38 re-invite request to them. Upon receipt, the attacker must send an SDP answer containing both a T.38 UDPTL stream and another media stream containing only a codec (which is not permitted according to the chan_sip configuration).

Impact

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

Base Score: 5.30 MEDIUM
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

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

Base Score 3.x
5.30
Severity 3.x
MEDIUM
Vector 2.0
AV:N/AC:M/Au:S/C:N/I:N/A:P CVSS v2.0 Severity and Metrics:

Base Score: 3.50 LOW
Vector: AV:N/AC:M/Au:S/C:N/I:N/A:P

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

Base Score 2.0
3.50
Severity 2.0
LOW

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:digium:certified_asterisk:1.8.0.0:-:*:*:*:*:*:*
cpe:2.3:a:digium:certified_asterisk:1.8.0.0:beta1:*:*:*:*:*:*
cpe:2.3:a:digium:certified_asterisk:1.8.0.0:beta2:*:*:*:*:*:*
cpe:2.3:a:digium:certified_asterisk:1.8.0.0:beta3:*:*:*:*:*:*
cpe:2.3:a:digium:certified_asterisk:1.8.0.0:beta4:*:*:*:*:*:*
cpe:2.3:a:digium:certified_asterisk:1.8.0.0:beta5:*:*:*:*:*:*
cpe:2.3:a:digium:certified_asterisk:1.8.0.0:rc1:*:*:*:*:*:*
cpe:2.3:a:digium:certified_asterisk:1.8.0.0:rc2:*:*:*:*:*:*
cpe:2.3:a:digium:certified_asterisk:1.8.0.0:rc3:*:*:*:*:*:*
cpe:2.3:a:digium:certified_asterisk:1.8.0.0:rc4:*:*:*:*:*:*
cpe:2.3:a:digium:certified_asterisk:1.8.0.0:rc5:*:*:*:*:*:*
cpe:2.3:a:digium:certified_asterisk:1.8.1.0:-:*:*:*:*:*:*
cpe:2.3:a:digium:certified_asterisk:1.8.1.0:rc1:*:*:*:*:*:*
cpe:2.3:a:digium:certified_asterisk:1.8.2.0:-:*:*:*:*:*:*
cpe:2.3:a:digium:certified_asterisk:1.8.2.0:rc1:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools