MediumFix available
cabextract, libmspack — security advisory
In mspack/cab.h in libmspack before 0.8alpha and cabextract before 1.8, the CAB block input buffer is one byte too small for the maximal Quantum block, leading to an out-of-bounds write.
- Products
- cabextract, libmspack
- Affected versions
- Not specified
- Fixed versions
- 0.8-1, 1.4-5
- CVEs
- CVE-2018-18584
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 01:33 UTC · Revision 1
Source evidence
In mspack/cab.h in libmspack before 0.8alpha and cabextract before 1.8, the CAB block input buffer is one byte too small for the maximal Quantum block, leading to an out-of-bounds write.
osv:DEBIAN-CVE-2018-18584
cabextract
Fixed versions: 1.4-5
cabextract
Fixed versions: 1.4-5
cabextract
Fixed versions: 1.4-5
libmspack
Fixed versions: 0.8-1
libmspack
Fixed versions: 0.8-1
libmspack
Fixed versions: 0.8-1
Complete source record
{
"id": "1bf5b64f64d89bab810c18221ee1829dfbee6768be9824e29c333965942a0988",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2018-18584",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2018-18584",
"summary": "In mspack/cab.h in libmspack before 0.8alpha and cabextract before 1.8, the CAB block input buffer is one byte too small for the maximal Quantum block, leading to an out-of-bounds write.",
"evidence": "osv:DEBIAN-CVE-2018-18584",
"products": [
{
"name": {
"value": "cabextract",
"evidence": "/affected/0/package/name"
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"evidence": "/affected/0/ranges"
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],
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},
{
"name": {
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},
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}
],
"affected_versions": []
},
{
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{
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],
"severity": "medium",
"structured": {
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"aliases": [
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"metrics": [
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],
"affected": [
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"package": {
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{
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"package": {
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"ecosystem": "Debian:13"
},
"database_specific": {
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{
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],
"package": {
"name": "cabextract",
"purl": "pkg:deb/debian/cabextract?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2018-18584.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
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},
{
"ranges": [
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"events": [
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],
"package": {
"name": "libmspack",
"purl": "pkg:deb/debian/libmspack?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2018-18584.json"
},
"ecosystem_specific": {
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},
{
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{
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],
"package": {
"name": "libmspack",
"purl": "pkg:deb/debian/libmspack?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2018-18584.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
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{
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]
}
],
"package": {
"name": "libmspack",
"purl": "pkg:deb/debian/libmspack?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2018-18584.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-23T18:04:47.361190050Z",
"provider": "osv",
"upstream": [
"CVE-2018-18584"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2018-18584"
]
},
"related_cves": [
{
"value": "CVE-2018-18584",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 423771,
"published_at": "2018-10-23T02:29:00.263+00:00"
}