High
libcoap, libcoap2 and 1 more products — security advisory
Buffer Overflow vulnerability in coap_send function in libcoap library 4.3.1-103-g52cfd56 fixed in 4.3.1-120-ge242200 allows attackers to obtain sensitive information via malformed pdu.
- Products
- libcoap, libcoap2, libcoap3
- Affected versions
- 4.1.2-1, 4.2.0-2, 4.2.1-1, 4.2.1-1build1, 4.3.0-2, 4.3.0-2build1, 4.3.1-2, 4.3.3-1, 4.3.4-1, 4.3.4-1.1build2, 4.3.4-1.1build3, 4.3.4-1.1build4, 4.3.5-1, 4.3.5-2, 4.3.5-3, 4.3.5-4, 4.3.5-4ubuntu1
- Fixed versions
- Not specified
- CVEs
- CVE-2023-30362
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 00:50 UTC · Revision 1
Source evidence
Buffer Overflow vulnerability in coap_send function in libcoap library 4.3.1-103-g52cfd56 fixed in 4.3.1-120-ge242200 allows attackers to obtain sensitive information via malformed pdu.
osv:UBUNTU-CVE-2023-30362
libcoap
Fixed versions: Not specified
libcoap2
Fixed versions: Not specified
libcoap2
Fixed versions: Not specified
libcoap3
Fixed versions: Not specified
libcoap3
Fixed versions: Not specified
libcoap3
Fixed versions: Not specified
libcoap3
Fixed versions: Not specified
libcoap3
Fixed versions: Not specified
Complete source record
{
"id": "df4114677f66a43da4dbe6812432a6d1c0e6f1537f933bb30fffe9b3ad31a4bf",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2023-30362",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2023-30362",
"summary": "Buffer Overflow vulnerability in coap_send function in libcoap library 4.3.1-103-g52cfd56 fixed in 4.3.1-120-ge242200 allows attackers to obtain sensitive information via malformed pdu.",
"evidence": "osv:UBUNTU-CVE-2023-30362",
"products": [
{
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{
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"affected_versions": [
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{
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{
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{
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{
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{
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{
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{
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"affected_versions": [
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"evidence": "/affected/6/versions"
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"evidence": "/affected/6/versions"
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{
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{
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},
{
"name": {
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"prerequisites": [],
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"affected_versions": [
{
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{
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"evidence": "/affected/7/versions"
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{
"value": "4.3.5-2",
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],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2023-30362",
"aliases": [
"UBUNTU-CVE-2023-30362"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
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"package": {
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"versions": [
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"database_specific": {
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},
"ecosystem_specific": {
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{
"binary_name": "libcoap-1-0-bin",
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{
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"package": {
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"purl": "pkg:deb/ubuntu/libcoap2?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"4.2.0-2",
"4.2.1-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-30362.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libcoap2",
"binary_version": "4.2.1-1"
},
{
"binary_name": "libcoap2-bin",
"binary_version": "4.2.1-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
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}
]
}
],
"package": {
"name": "libcoap2",
"purl": "pkg:deb/ubuntu/libcoap2?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"4.2.1-1",
"4.2.1-1build1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-30362.json"
},
"ecosystem_specific": {
"binaries": [
{
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"package": {
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"purl": "pkg:deb/ubuntu/libcoap3?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"4.3.0-2",
"4.3.0-2build1"
],
"database_specific": {
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],
"database_specific": {
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},
"ecosystem_specific": {
"binaries": [
{
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},
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"binary_name": "libcoap3t64",
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},
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],
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},
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}
],
"modified": "2026-10-17T12:56:07.166973026Z",
"provider": "osv",
"upstream": [
"CVE-2023-30362"
],
"references": [
"https://ubuntu.com/security/CVE-2023-30362",
"https://github.com/obgm/libcoap/pull/1065",
"https://github.com/obgm/libcoap/issues/1063",
"https://www.cve.org/CVERecord?id=CVE-2023-30362"
]
},
"related_cves": [
{
"value": "CVE-2023-30362",
"evidence": "/upstream"
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],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 354849,
"published_at": "2023-06-23T12:15:00+00:00"
}