High
Security advisory
scan.c in x11vnc 0.9.16 uses IPC_CREAT|0777 in shmget calls, which allows access by actors other than the current user.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2020-29074
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 12:36 UTC · Revision 1
Source evidence
scan.c in x11vnc 0.9.16 uses IPC_CREAT|0777 in shmget calls, which allows access by actors other than the current user.
osv:CVE-2020-29074
Complete source record
{
"id": "5aafac22c71e9b917d864ef8ca6959d25179ec9f26f65d486220f309990e4104",
"url": "https://osv.dev/vulnerability/CVE-2020-29074",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2020-29074",
"summary": "scan.c in x11vnc 0.9.16 uses IPC_CREAT|0777 in shmget calls, which allows access by actors other than the current user.",
"evidence": "osv:CVE-2020-29074",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2020-29074",
"aliases": [
"CVE-2020-29074"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/libvnc/x11vnc",
"type": "GIT",
"events": [
{
"introduced": "4ca006fed80410bd9b061a1519bd5d9366bb0bc8"
},
{
"last_affected": "4ca006fed80410bd9b061a1519bd5d9366bb0bc8"
},
{
"fixed": "69eeb9f7baa14ca03b16c9de821f9876def7a36a"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:x11vnc_project:x11vnc:0.9.16:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0.9.16"
},
{
"last_affected": "0.9.16"
}
],
"source": "CPE_STRING"
},
{
"range": [
{
"fixed": "69eeb9f7baa14ca03b16c9de821f9876def7a36a"
}
],
"source": "REFERENCES_COMMIT"
}
]
}
}
],
"versions": [
"0.9.16"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-29074.json",
"vanir_signatures": [
{
"id": "CVE-2020-29074-16496eb1",
"digest": {
"threshold": 0.9,
"line_hashes": [
"56740894291832566308400293842992874083",
"35125186519063144221375988472889355695",
"20298482367566999856091248652949110519",
"126259484339115188972053899482603857563"
]
},
"source": "https://github.com/libvnc/x11vnc/commit/69eeb9f7baa14ca03b16c9de821f9876def7a36a",
"target": {
"file": "src/scan.c"
},
"deprecated": false,
"signature_type": "Line",
"signature_version": "v1"
},
{
"id": "CVE-2020-29074-32a2291b",
"digest": {
"length": 2481,
"function_hash": "105144691058749000443747703101666032586"
},
"source": "https://github.com/libvnc/x11vnc/commit/69eeb9f7baa14ca03b16c9de821f9876def7a36a",
"target": {
"file": "src/scan.c",
"function": "shm_create"
},
"deprecated": false,
"signature_type": "Function",
"signature_version": "v1"
}
],
"vanir_signatures_modified": "2026-10-20T13:59:34Z"
}
}
],
"modified": "2026-10-20T13:59:34.586930627Z",
"provider": "osv",
"references": [
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/H2FLWSVH32O6JXLRQBYDQLP7XRSTLUPQ/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MHVXHZE3YIP4RTWGQ24IDBSW44XPRDOC/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PZL6NQTNK5PT63D2JX5YVV5OLUL76S5C/",
"https://lists.debian.org/debian-lts-announce/2020/12/msg00018.html",
"https://www.debian.org/security/2020/dsa-4799",
"https://github.com/LibVNC/x11vnc/commit/69eeb9f7baa14ca03b16c9de821f9876def7a36a"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
"cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
],
"vendor_product": "debian:debian_linux",
"extracted_events": [
{
"range": [
{
"introduced": "9.0"
},
{
"last_affected": "9.0"
},
{
"introduced": "10.0"
},
{
"last_affected": "10.0"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*",
"cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*",
"cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*"
],
"vendor_product": "fedoraproject:fedora",
"extracted_events": [
{
"range": [
{
"introduced": "32"
},
{
"last_affected": "32"
},
{
"introduced": "33"
},
{
"last_affected": "33"
},
{
"introduced": "34"
},
{
"last_affected": "34"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2020-29074",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 388485,
"published_at": "2020-11-25T23:15:11.3+00:00"
}