Attacker Value
Unknown
(0 users assessed)
Exploitability
Unknown
(0 users assessed)
User Interaction
None
Privileges Required
Low
Attack Vector
Network
0

CVE-2019-13161

Disclosure Date: July 12, 2019 •
CVE-2019-13161 CVSS v3 Base Score: 5.3
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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).

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CVSS V3 Severity and Metrics
Base Score:
5.3 Medium
Impact Score:
3.6
Exploitability Score:
1.6
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

General Information

Offensive Application
Unknown
Utility Class
Unknown
Ports
Unknown
OS
Unknown
Vulnerable Versions
n/a
Prerequisites
Unknown
Discovered By
Unknown
PoC Author
Unknown
Metasploit Module
Unknown
Reporter
Unknown

Vendors

  • debian,
  • digium

Products

  • asterisk,
  • certified asterisk 1.8.0.0,
  • certified asterisk 1.8.1.0,
  • certified asterisk 1.8.10.0,
  • certified asterisk 1.8.11,
  • certified asterisk 1.8.11.0,
  • certified asterisk 1.8.12.0,
  • certified asterisk 1.8.13.0,
  • certified asterisk 1.8.14.0,
  • certified asterisk 1.8.15,
  • certified asterisk 1.8.2.0,
  • certified asterisk 1.8.28,
  • certified asterisk 1.8.28.0,
  • certified asterisk 1.8.3.0,
  • certified asterisk 1.8.4.0,
  • certified asterisk 1.8.5.0,
  • certified asterisk 1.8.6.0,
  • certified asterisk 1.8.7.0,
  • certified asterisk 1.8.8.0,
  • certified asterisk 1.8.9.0,
  • certified asterisk 11.0.0,
  • certified asterisk 11.1.0,
  • certified asterisk 11.2,
  • certified asterisk 11.3.0,
  • certified asterisk 11.4.0,
  • certified asterisk 11.5.0,
  • certified asterisk 11.6,
  • certified asterisk 11.6.0,
  • certified asterisk 13.1,
  • certified asterisk 13.1.0,
  • certified asterisk 13.13,
  • certified asterisk 13.13-cert2,
  • certified asterisk 13.18,
  • certified asterisk 13.21,
  • certified asterisk 13.8,
  • certified asterisk 13.8.0,
  • debian linux 8.0,
  • debian linux 9.0
Technical Analysis