MediumFix available
asterisk — security advisory
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.
- Products
- asterisk
- Affected versions
- Not specified
- Fixed versions
- 16.16.1-r0, 18.1.1-r0
- CVEs
- CVE-2020-35776
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 12:11 UTC · Revision 1
Source evidence
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.
osv:ALPINE-CVE-2020-35776
asterisk
Fixed versions: 16.16.1-r0
asterisk
Fixed versions: 18.1.1-r0
asterisk
Fixed versions: 18.1.1-r0
asterisk
Fixed versions: 18.1.1-r0
asterisk
Fixed versions: 18.1.1-r0
asterisk
Fixed versions: 18.1.1-r0
asterisk
Fixed versions: 18.1.1-r0
asterisk
Fixed versions: 18.1.1-r0
asterisk
Fixed versions: 18.1.1-r0
asterisk
Fixed versions: 18.1.1-r0
asterisk
Fixed versions: 18.1.1-r0
asterisk
Fixed versions: 18.1.1-r0
asterisk
Fixed versions: 18.1.1-r0
Complete source record
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"url": "https://osv.dev/vulnerability/ALPINE-CVE-2020-35776",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "ALPINE-CVE-2020-35776",
"summary": "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.",
"evidence": "osv:ALPINE-CVE-2020-35776",
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],
"severity": "medium",
"structured": {
"id": "ALPINE-CVE-2020-35776",
"aliases": [
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"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
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],
"modified": "2026-10-26T11:17:55.173861190Z",
"provider": "osv",
"upstream": [
"CVE-2020-35776"
],
"references": [
"https://security.alpinelinux.org/vuln/CVE-2020-35776"
]
},
"related_cves": [
{
"value": "CVE-2020-35776",
"evidence": "/upstream"
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],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 450637,
"published_at": "2021-02-18T20:15:12.447+00:00"
}