Home/CVE/A buffer overflow in res_pjsip_diversion.c in Sangoma Asterisk versions 13.38.1, 16.15.1, 17.9.1, and 18.1.1 allows remo
CVE

CVE-2020-35776

A buffer overflow in res_pjsip_diversion.c in Sangoma Asterisk versions 13.38.1, 16.15.1, 17.9.1, and 18.1.1 allows remo

A buffer overflow in res_pjsip_diversion.c in Sangoma Asterisk versions 13.38.1, 16.15.1, 17.9.1, and 18.1.1 allows remote attacker to crash Asterisk by deliberately misusing SIP 181 responses.

MEDIUM · CVSS 6.5 EPSS 0.00085
Schedule remediation
  • Public exploit or PoC is available
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
▤

Affected Products & Versions

4
digium asterisk>= 13.0.0 and <= 13.38.1
digium asterisk>= 16.0.0 and <= 16.15.1
digium asterisk>= 17.0.0 and <= 17.9.1
digium asterisk>= 18.0 and <= 18.1.1
⚠

Public Exploits & PoCs

2
pocpacketstormsecurity.com · Asterisk-Project-Security-Advisory-AST-2021-001.htmlpacketstormsecurity.com
pocissues.asterisk.org · ASTERISK-29227issues.asterisk.org
▣

Scoring & Timeline

6.5
MEDIUM · 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 NVD18 Feb 2021 · 08:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
🔗

References & Sources

3
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/Feb/57Mailing ListThird Party Advisory
https://downloads.asterisk.org/pub/security/AST-2021-001.htmlVendor Advisory
https://issues.asterisk.org/Issue TrackingVendor Advisory
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