Home/CVE/An issue was discovered in Sangoma Asterisk 13.x before 13.38.3, 16.x before 16.19.1, 17.x before 17.9.4, and 18.x befor
CVE

CVE-2021-32558

An issue was discovered in Sangoma Asterisk 13.x before 13.38.3, 16.x before 16.19.1, 17.x before 17.9.4, and 18.x befor

An issue was discovered in Sangoma Asterisk 13.x before 13.38.3, 16.x before 16.19.1, 17.x before 17.9.4, and 18.x before 18.5.1, and Certified Asterisk before 16.8-cert10. If the IAX2 channel driver receives a packet that contains an unsupported media format, a crash can occur.

HIGH · CVSS 7.5 EPSS 0.02875
Act now
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
▤

Affected Products & Versions

6
digium asterisk>= 13.0.0 and < 13.38.3
digium asterisk>= 16.0.0 and < 16.19.1
digium asterisk>= 17.0.0 and < 17.9.4
digium asterisk>= 18.0.0 and < 18.15.1
digium certified asteriskall versions
debian linuxall versions
⚠

Public Exploits & PoCs

2
pocpacketstormsecurity.com · Asterisk-Project-Security-Advisory-AST-2021-008.htmlpacketstormsecurity.com
pocissues.asterisk.org · ASTERISK-29392issues.asterisk.org
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD30 Jul 2021 · 02:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
🔗

References & Sources

4
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://seclists.org/fulldisclosure/2021/Jul/49Mailing ListPatchThird Party Advisory
https://downloads.asterisk.org/pub/security/AST-2021-008.htmlPatchVendor Advisory
https://lists.debian.org/debian-lts-announce/2021/08/msg00005.htmlMailing ListThird Party Advisory
https://www.debian.org/security/2021/dsa-4999Third Party Advisory
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