Vulnerability Monitor

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CVE-2021-26717

An issue was discovered in Sangoma Asterisk 16.x before 16.16.1, 17.x before 17.9.2, and 18.x before 18.2.1 and Certified Asterisk before 16.8-cert6. When re-negotiating for T.38, if the initial remote response was delayed just enough, Asterisk would send both audio and T.38 in the SDP. If this happened, and the remote responded with a declined T.38 stream, then Asterisk would crash.

Published

2021-02-18T20:15:12.667

Last Modified

2024-11-21T05:56:44.287

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.5 (HIGH)

CVSSv2 Vector

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

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

10.0

Impact Score

2.9

Weaknesses
  • Type: Primary
    NVD-CWE-noinfo
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