CVE-2019-18790

MEDIUM EPSS 78.8%
Published Nov 22, 20196y ago · Modified Jun 17, 20262w ago
6.5 CVSS 3.1
Medium
Find Similar
Published Nov 22, 2019 6y ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
6.5
Exploitability
3.9
Impact
2.5
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity Low
Availability None

Threat Intelligence

EPSS Exploit Probability
78.8% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-862 Missing Authorization Authorization

Affected Products 11

VendorProductVersionRange
digiumasterisk*≥13.0.0  –  <13.29.2
digiumasterisk*≥16.0.0  –  <16.6.2
digiumasterisk*≥17.0.0  –  <17.0.1
digiumcertified_asterisk13.21.0any
digiumcertified_asterisk13.21.0any
digiumcertified_asterisk13.21.0any
digiumcertified_asterisk13.21.0any
digiumcertified_asterisk13.21.0any
digiumcertified_asterisk13.21.0any
debiandebian_linux8.0any
debiandebian_linux9.0any

References 4

  • downloads.asterisk.org http://downloads.asterisk.org/pub/security/AST-2019-006.html
    PatchVendor Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2019/11/msg00038.html
    Mailing ListThird Party Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2022/04/msg00001.html
    Mailing ListThird Party Advisory
  • asterisk.org https://www.asterisk.org/downloads/security-advisories
    Vendor Advisory

Remediation