Vulnerability Monitor

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CVE-2021-26713

A stack-based buffer overflow in res_rtp_asterisk.c in Sangoma Asterisk before 16.16.1, 17.x before 17.9.2, and 18.x before 18.2.1 and Certified Asterisk before 16.8-cert6 allows an authenticated WebRTC client to cause an Asterisk crash by sending multiple hold/unhold requests in quick succession. This is caused by a signedness comparison mismatch.

Published

2021-02-19T20:15:13.193

Last Modified

2024-11-21T05:56:43.707

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-787
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application digium asterisk < 16.16.1 Yes
Application digium asterisk < 17.9.2 Yes
Application digium asterisk < 18.2.1 Yes
Application digium certified_asterisk 16.8 Yes
Application digium certified_asterisk 16.8 Yes
Application digium certified_asterisk 16.8 Yes
Application digium certified_asterisk 16.8 Yes
Application digium certified_asterisk 16.8 Yes
Application digium certified_asterisk 16.8 Yes
Application digium certified_asterisk 16.8 Yes
Application digium certified_asterisk 16.8 Yes
Application digium certified_asterisk 16.8 Yes
Application digium certified_asterisk 16.8 Yes
Application digium certified_asterisk 16.8 Yes
Application digium certified_asterisk 16.8 Yes
Application digium certified_asterisk 16.8 Yes
References