coturn — security advisory
Coturn 4.10.0 contains an uninitialized memory disclosure vulnerability that allows remote unauthenticated attackers to leak stack memory contents by sending a TURN Allocate request without credentials. Attackers can exploit the stun_init_error_response_common_str() function in src/client/ns_turn_msg.c, which fails to zero-initialize the avalue buffer before computing its length with strlen() and copying leaked stack bytes into the ERROR-CODE reason phrase, exposing pointer fragments that weaken ASLR and enable precise version fingerprinting.
- Products
- coturn
- Affected versions
- 4.12.0-1, 4.14.0-1, 4.15.0-1, 4.18.0-1, 4.6.1-1, 4.6.1-2
- Fixed versions
- 4.12.0-1
- CVEs
- CVE-2026-104074
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 29 Oct 2026, 13:52 UTC · Revision 1
Source evidence
Coturn 4.10.0 contains an uninitialized memory disclosure vulnerability that allows remote unauthenticated attackers to leak stack memory contents by sending a TURN Allocate request without credentials. Attackers can exploit the stun_init_error_response_common_str() function in src/client/ns_turn_msg.c, which fails to zero-initialize the avalue buffer before computing its length with strlen() and copying leaked stack bytes into the ERROR-CODE reason phrase, exposing pointer fragments that weaken ASLR and enable precise version fingerprinting.
osv:DEBIAN-CVE-2026-104074
coturn
Fixed versions: Not specified
coturn
Fixed versions: Not specified
coturn
Fixed versions: 4.12.0-1
Complete source record
{
"id": "d70e51a9f6901bdcf9817052e4c82a8819e663b9ee0eabcc0770bf44160f5820",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-104074",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-104074",
"summary": "Coturn 4.10.0 contains an uninitialized memory disclosure vulnerability that allows remote unauthenticated attackers to leak stack memory contents by sending a TURN Allocate request without credentials. Attackers can exploit the stun_init_error_response_common_str() function in src/client/ns_turn_msg.c, which fails to zero-initialize the avalue buffer before computing its length with strlen() and copying leaked stack bytes into the ERROR-CODE reason phrase, exposing pointer fragments that weaken ASLR and enable precise version fingerprinting.",
"evidence": "osv:DEBIAN-CVE-2026-104074",
"products": [
{
"name": {
"value": "coturn",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.12.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "4.14.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "4.15.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "4.18.0-1",
"evidence": "/affected/0/versions"
},
{
"value": "4.6.1-1",
"evidence": "/affected/0/versions"
},
{
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"evidence": "/affected/0/versions"
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{
"name": {
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{
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{
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"severity": "medium",
"structured": {
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"aliases": [
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],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
}
],
"affected": [
{
"ranges": [
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"type": "ECOSYSTEM",
"events": [
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"package": {
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"purl": "pkg:deb/debian/coturn?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
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"versions": [
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"4.14.0-1",
"4.15.0-1",
"4.18.0-1",
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],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-104074.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
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"events": [
{
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}
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}
],
"package": {
"name": "coturn",
"purl": "pkg:deb/debian/coturn?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"4.12.0-1",
"4.14.0-1",
"4.15.0-1",
"4.18.0-1",
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],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-104074.json"
},
"ecosystem_specific": {
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{
"ranges": [
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"package": {
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"ecosystem": "Debian:14"
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"versions": [
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],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-104074.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-10T16:00:05.882827949Z",
"provider": "osv",
"upstream": [
"CVE-2026-104074"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-104074"
]
},
"related_cves": [
{
"value": "CVE-2026-104074",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 250464,
"published_at": "2026-10-07T15:17:02.76+00:00"
}