Vulnerability Monitor

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CVE-2020-28242

An issue was discovered in Asterisk Open Source 13.x before 13.37.1, 16.x before 16.14.1, 17.x before 17.8.1, and 18.x before 18.0.1 and Certified Asterisk before 16.8-cert5. If Asterisk is challenged on an outbound INVITE and the nonce is changed in each response, Asterisk will continually send INVITEs in a loop. This causes Asterisk to consume more and more memory since the transaction will never terminate (even if the call is hung up), ultimately leading to a restart or shutdown of Asterisk. Outbound authentication must be configured on the endpoint for this to occur.

Published

2020-11-06T06:15:11.930

Last Modified

2024-11-21T05:22:30.340

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 6.5 (MEDIUM)

CVSSv2 Vector

AV:N/AC:L/Au:S/C:N/I:N/A:P

  • Access Vector: NETWORK
  • Access Complexity: LOW
  • Authentication: SINGLE
  • Confidentiality Impact: NONE
  • Integrity Impact: NONE
  • Availability Impact: PARTIAL
Exploitability Score

8.0

Impact Score

2.9

Weaknesses
  • Type: Primary
    CWE-674
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application asterisk certified_asterisk ≤ 16.8.0 Yes
Application sangoma asterisk < 13.37.1 Yes
Application sangoma asterisk < 16.14.1 Yes
Application sangoma asterisk < 17.8.1 Yes
Application sangoma asterisk < 18.0.1 Yes
Operating System fedoraproject fedora 33 Yes
Operating System debian debian_linux 9.0 Yes
References