VDB

CVE-2021-26713

CVE-2021-26713 PUBLISHED CVSS 6.5 MEDIUM

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.

EPSS 1.84% · 77.5th percentile

Risk Scores

CVSS 3.1
6.5
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS Score
1.84%
77.5th percentile

Affected Products

VendorProductVersions
Ubuntu:22.04:LTSasterisk0, 1:18.10.0~dfsg+~cs6.10.40431411-2, *
Ubuntu:24.04:LTSasterisk*, 1:20.5.0~dfsg+~cs6.13.40431414-1, 1:20.5.1~dfsg+~cs6.13.40431414-1
Ubuntu:25.10asterisk*, 1:22.5.2~dfsg+~cs6.15.60671435-1, 1:22.4.1~dfsg+~cs6.15.60671435-2

Timeline

  • Feb 19, 2021 CVE Published
  • Apr 14, 2021 EPSS Score
  • Jun 23, 2021 EPSS Score
  • Aug 24, 2021 EPSS Score
  • Dec 28, 2021 EPSS Score
  • Jan 6, 2022 EPSS Score
  • Feb 4, 2022 EPSS Score
  • Feb 28, 2022 EPSS Score
  • Apr 1, 2022 EPSS Score
  • May 2, 2022 EPSS Score
  • Sep 6, 2022 EPSS Score
  • Nov 7, 2022 EPSS Score

References

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