High
belle-sip — security advisory
Belledonne Belle-sip before 4.5.20, as used in Linphone and other products, can crash via an invalid From header in a SIP message.
- Products
- belle-sip
- Affected versions
- 1.4.1-1, 1.4.1-1.1, 1.6.3-2, 1.6.3-5, 4.4.21+dfsg-1, 5.2.0+dfsg-3, 5.2.0+dfsg-3.1build1, 5.2.0+dfsg-3.1build2, 5.2.0+dfsg-3.1build3, 5.3.105+dfsg-4, 5.3.105+dfsg-4.1
- Fixed versions
- Not specified
- CVEs
- CVE-2021-33056
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 00:34 UTC · Revision 1
Source evidence
Belledonne Belle-sip before 4.5.20, as used in Linphone and other products, can crash via an invalid From header in a SIP message.
osv:UBUNTU-CVE-2021-33056
belle-sip
Fixed versions: Not specified
belle-sip
Fixed versions: Not specified
belle-sip
Fixed versions: Not specified
belle-sip
Fixed versions: Not specified
belle-sip
Fixed versions: Not specified
belle-sip
Fixed versions: Not specified
belle-sip
Fixed versions: Not specified
belle-sip
Fixed versions: Not specified
Complete source record
{
"id": "ef9e3082cbd305f7c27740b01ca403cd88bf60efe9dddd5b8b758693ecf3f9db",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2021-33056",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2021-33056",
"summary": "Belledonne Belle-sip before 4.5.20, as used in Linphone and other products, can crash via an invalid From header in a SIP message.",
"evidence": "osv:UBUNTU-CVE-2021-33056",
"products": [
{
"name": {
"value": "belle-sip",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.4.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.4.1-1.1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "belle-sip",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.4.1-1.1",
"evidence": "/affected/1/versions"
},
{
"value": "1.6.3-2",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "belle-sip",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.6.3-5",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "belle-sip",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.4.21+dfsg-1",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "belle-sip",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "5.2.0+dfsg-3",
"evidence": "/affected/4/versions"
},
{
"value": "5.2.0+dfsg-3.1build1",
"evidence": "/affected/4/versions"
},
{
"value": "5.2.0+dfsg-3.1build2",
"evidence": "/affected/4/versions"
},
{
"value": "5.2.0+dfsg-3.1build3",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "belle-sip",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "5.3.105+dfsg-4",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "belle-sip",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "5.3.105+dfsg-4.1",
"evidence": "/affected/6/versions"
}
]
},
{
"name": {
"value": "belle-sip",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "5.3.105+dfsg-4",
"evidence": "/affected/7/versions"
},
{
"value": "5.3.105+dfsg-4.1",
"evidence": "/affected/7/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2021-33056",
"aliases": [
"UBUNTU-CVE-2021-33056"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "belle-sip",
"purl": "pkg:deb/ubuntu/belle-sip?arch=source&distro=xenial",
"ecosystem": "Ubuntu:16.04:LTS"
},
"versions": [
"1.4.1-1",
"1.4.1-1.1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-33056.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libbellesip0",
"binary_version": "1.4.1-1.1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "belle-sip",
"purl": "pkg:deb/ubuntu/belle-sip?arch=source&distro=bionic",
"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
"1.4.1-1.1",
"1.6.3-2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-33056.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libbellesip0",
"binary_version": "1.6.3-2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "belle-sip",
"purl": "pkg:deb/ubuntu/belle-sip?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"1.6.3-5"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-33056.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libbellesip0",
"binary_version": "1.6.3-5"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "belle-sip",
"purl": "pkg:deb/ubuntu/belle-sip?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"4.4.21+dfsg-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-33056.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libbellesip1",
"binary_version": "4.4.21+dfsg-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "belle-sip",
"purl": "pkg:deb/ubuntu/belle-sip?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"5.2.0+dfsg-3",
"5.2.0+dfsg-3.1build1",
"5.2.0+dfsg-3.1build2",
"5.2.0+dfsg-3.1build3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-33056.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libbellesip2t64",
"binary_version": "5.2.0+dfsg-3.1build3"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "belle-sip",
"purl": "pkg:deb/ubuntu/belle-sip?arch=source&distro=questing",
"ecosystem": "Ubuntu:25.10"
},
"versions": [
"5.3.105+dfsg-4"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-33056.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "bellesip-data",
"binary_version": "5.3.105+dfsg-4"
},
{
"binary_name": "libbellesip3",
"binary_version": "5.3.105+dfsg-4"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "belle-sip",
"purl": "pkg:deb/ubuntu/belle-sip?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"5.3.105+dfsg-4.1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-33056.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "bellesip-data",
"binary_version": "5.3.105+dfsg-4.1"
},
{
"binary_name": "libbellesip3",
"binary_version": "5.3.105+dfsg-4.1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "belle-sip",
"purl": "pkg:deb/ubuntu/belle-sip?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"5.3.105+dfsg-4",
"5.3.105+dfsg-4.1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-33056.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "bellesip-data",
"binary_version": "5.3.105+dfsg-4.1"
},
{
"binary_name": "libbellesip3",
"binary_version": "5.3.105+dfsg-4.1"
}
]
}
}
],
"modified": "2026-10-17T12:55:46.724876961Z",
"provider": "osv",
"upstream": [
"CVE-2021-33056"
],
"references": [
"https://ubuntu.com/security/CVE-2021-33056",
"https://github.com/BelledonneCommunications/belle-sip/commit/116e3eb48fe43ea63eb9f3c4b4b30c48d58d6ff0",
"https://github.com/BelledonneCommunications/belle-sip/compare/4.5.15...4.5.20",
"https://www.cve.org/CVERecord?id=CVE-2021-33056"
]
},
"related_cves": [
{
"value": "CVE-2021-33056",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 354059,
"published_at": "2021-08-12T21:15:00+00:00"
}