High
Security advisory
In Wireshark 2.6.0 to 2.6.4 and 2.4.0 to 2.4.10, the LBMPDM dissector could crash. In addition, a remote attacker could write arbitrary data to any memory locations before the packet-scoped memory. This was addressed in epan/dissectors/packet-lbmpdm.c by disallowing certain negative values.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2018-19623
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 04:27 UTC · Revision 1
Source evidence
In Wireshark 2.6.0 to 2.6.4 and 2.4.0 to 2.4.10, the LBMPDM dissector could crash. In addition, a remote attacker could write arbitrary data to any memory locations before the packet-scoped memory. This was addressed in epan/dissectors/packet-lbmpdm.c by disallowing certain negative values.
osv:CVE-2018-19623
Complete source record
{
"id": "a8a8415fca1905fefeeeba0020a7141d25fdd101fce68f350671586c2f396c48",
"url": "https://osv.dev/vulnerability/CVE-2018-19623",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2018-19623",
"summary": "In Wireshark 2.6.0 to 2.6.4 and 2.4.0 to 2.4.10, the LBMPDM dissector could crash. In addition, a remote attacker could write arbitrary data to any memory locations before the packet-scoped memory. This was addressed in epan/dissectors/packet-lbmpdm.c by disallowing certain negative values.",
"evidence": "osv:CVE-2018-19623",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2018-19623",
"aliases": [
"CVE-2018-19623"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/wireshark/wireshark",
"type": "GIT",
"events": [
{
"introduced": "9be0fa500da594ed01baf3214642838d22811c90"
},
{
"last_affected": "513f170dc8e610a206f278eae41acf6c007b234c"
},
{
"introduced": "c7239f0201292253817c7c4c9a394a47113ca55c"
},
{
"last_affected": "29d48ec873e8a17280b9295159f7a946cf5ad558"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:wireshark:wireshark:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.0"
},
{
"last_affected": "2.4.10"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:wireshark:wireshark:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.6.0"
},
{
"last_affected": "2.6.4"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"wireshark-2.4.10",
"v2.4.10",
"wireshark-2.6.4",
"v2.6.4",
"v2.4.10rc0",
"v2.6.4rc0",
"wireshark-2.4.9",
"v2.4.9",
"wireshark-2.6.3",
"v2.6.3",
"v2.4.9rc0",
"v2.6.3rc0",
"wireshark-2.4.8",
"v2.4.8",
"wireshark-2.6.2",
"v2.6.2",
"v2.4.8rc0",
"v2.6.2rc0",
"wireshark-2.4.7",
"v2.4.7",
"wireshark-2.6.1",
"v2.6.1",
"v2.6.1rc0",
"wireshark-2.6.0",
"v2.6.0",
"v2.4.7rc0",
"wireshark-2.4.6",
"v2.4.6",
"v2.4.6rc0",
"wireshark-2.4.5",
"v2.4.5",
"v2.4.5rc0",
"wireshark-2.4.4",
"v2.4.4",
"v2.4.4rc0",
"wireshark-2.4.3",
"v2.4.3",
"v2.4.3rc0",
"wireshark-2.4.2",
"v2.4.2",
"v2.4.2rc0",
"wireshark-2.4.1",
"v2.4.1",
"v2.4.1rc0",
"wireshark-2.4.0",
"v2.4.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-19623.json"
}
},
{
"ranges": [
{
"repo": "https://gitlab.com/wireshark/wireshark",
"type": "GIT",
"events": [
{
"introduced": "9be0fa500da594ed01baf3214642838d22811c90"
},
{
"last_affected": "513f170dc8e610a206f278eae41acf6c007b234c"
},
{
"introduced": "c7239f0201292253817c7c4c9a394a47113ca55c"
},
{
"last_affected": "29d48ec873e8a17280b9295159f7a946cf5ad558"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:wireshark:wireshark:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.4.0"
},
{
"last_affected": "2.4.10"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:wireshark:wireshark:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.6.0"
},
{
"last_affected": "2.6.4"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"wireshark-2.4.10",
"v2.4.10",
"wireshark-2.6.4",
"v2.6.4",
"v2.4.10rc0",
"v2.6.4rc0",
"wireshark-2.4.9",
"v2.4.9",
"wireshark-2.6.3",
"v2.6.3",
"v2.4.9rc0",
"v2.6.3rc0",
"wireshark-2.4.8",
"v2.4.8",
"wireshark-2.6.2",
"v2.6.2",
"v2.4.8rc0",
"v2.6.2rc0",
"wireshark-2.4.7",
"v2.4.7",
"wireshark-2.6.1",
"v2.6.1",
"v2.6.1rc0",
"wireshark-2.6.0",
"v2.6.0",
"v2.4.7rc0",
"wireshark-2.4.6",
"v2.4.6",
"v2.4.6rc0",
"wireshark-2.4.5",
"v2.4.5",
"v2.4.5rc0",
"wireshark-2.4.4",
"v2.4.4",
"v2.4.4rc0",
"wireshark-2.4.3",
"v2.4.3",
"v2.4.3rc0",
"wireshark-2.4.2",
"v2.4.2",
"v2.4.2rc0",
"wireshark-2.4.1",
"v2.4.1",
"v2.4.1rc0",
"wireshark-2.4.0",
"v2.4.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-19623.json"
}
}
],
"modified": "2026-10-24T10:30:18.586374993Z",
"provider": "osv",
"references": [
"https://code.wireshark.org/review/gitweb?p=wireshark.git%3Ba=commit%3Bh=9c8645ec7b28e4d7193962ecd2a418613bf6a84f",
"https://www.oracle.com/security-alerts/cpuapr2020.html",
"https://lists.debian.org/debian-lts-announce/2019/01/msg00010.html",
"https://www.debian.org/security/2018/dsa-4359",
"https://www.wireshark.org/security/wnpa-sec-2018-53.html",
"https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=15132"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*",
"cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
],
"vendor_product": "debian:debian_linux",
"extracted_events": [
{
"range": [
{
"introduced": "8.0"
},
{
"last_affected": "8.0"
},
{
"introduced": "9.0"
},
{
"last_affected": "9.0"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2018-19623",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 429810,
"published_at": "2018-11-29T04:29:00.327+00:00"
}