CVE-2021-26717 Affecting asterisk package, versions [16.0.0,16.16.1)[17.0.0,17.9.2)[18.0,18.2.1)


Severity

Recommended
0.0
high
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
1.95% (89th percentile)

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  • Snyk IDSNYK-UNMANAGED-ASTERISK-2371557
  • published26 Jan 2022
  • disclosed18 Feb 2021
  • creditUnknown

Introduced: 18 Feb 2021

CVE-2021-26717  (opens in a new tab)

How to fix?

Upgrade asterisk to version 16.16.1, 17.9.2, 18.2.1 or higher.

Overview

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.

CVSS Base Scores

version 3.1