Critical
Security advisory
FreeRDP prior to version 2.0.0-rc4 contains a Heap-Based Buffer Overflow in function zgfx_decompress_segment() that results in a memory corruption and probably even a remote code execution.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2018-8784
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 12:27 UTC · Revision 1
Source evidence
FreeRDP prior to version 2.0.0-rc4 contains a Heap-Based Buffer Overflow in function zgfx_decompress_segment() that results in a memory corruption and probably even a remote code execution.
osv:CVE-2018-8784
Complete source record
{
"id": "e792fbc413130c4f3aef742f669807a6c12e6f7aa4f2ed01963c28136176009a",
"url": "https://osv.dev/vulnerability/CVE-2018-8784",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2018-8784",
"summary": "FreeRDP prior to version 2.0.0-rc4 contains a Heap-Based Buffer Overflow in function zgfx_decompress_segment() that results in a memory corruption and probably even a remote code execution.",
"evidence": "osv:CVE-2018-8784",
"products": [],
"severity": "critical",
"structured": {
"id": "CVE-2018-8784",
"aliases": [
"CVE-2018-8784"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/freerdp/freerdp",
"type": "GIT",
"events": [
{
"introduced": "84f8161897534d9263ffebe43092827d40fc7ffb"
},
{
"last_affected": "a4f147683db7aa99a6075aeaf7c698bc6ba84d11"
},
{
"fixed": "17c363a5162fd4dc77b1df54e48d7bd9bf6b3be7"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:freerdp:freerdp:2.0.0:rc1:*:*:*:*:*:*",
"range": [
{
"introduced": "2.0.0-rc1"
},
{
"last_affected": "2.0.0-rc1"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:freerdp:freerdp:2.0.0:rc2:*:*:*:*:*:*",
"range": [
{
"introduced": "2.0.0-rc2"
},
{
"last_affected": "2.0.0-rc2"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:freerdp:freerdp:2.0.0:rc3:*:*:*:*:*:*",
"range": [
{
"introduced": "2.0.0-rc3"
},
{
"last_affected": "2.0.0-rc3"
}
],
"source": "CPE_STRING"
},
{
"range": [
{
"fixed": "17c363a5162fd4dc77b1df54e48d7bd9bf6b3be7"
}
],
"source": "REFERENCES_COMMIT"
}
]
}
}
],
"versions": [
"2.0.0-rc1",
"2.0.0-rc2",
"2.0.0-rc3"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-8784.json",
"vanir_signatures": [
{
"id": "CVE-2018-8784-3ee578e2",
"digest": {
"length": 498,
"function_hash": "5425658578842756555766032532911221974"
},
"source": "https://github.com/freerdp/freerdp/commit/17c363a5162fd4dc77b1df54e48d7bd9bf6b3be7",
"target": {
"file": "libfreerdp/codec/zgfx.c",
"function": "zgfx_GetBits"
},
"deprecated": false,
"signature_type": "Function",
"signature_version": "v1"
},
{
"id": "CVE-2018-8784-99d08a87",
"digest": {
"threshold": 0.9,
"line_hashes": [
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},
"source": "https://github.com/freerdp/freerdp/commit/17c363a5162fd4dc77b1df54e48d7bd9bf6b3be7",
"target": {
"file": "libfreerdp/codec/zgfx.c"
},
"deprecated": false,
"signature_type": "Line",
"signature_version": "v1"
},
{
"id": "CVE-2018-8784-e4341463",
"digest": {
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"function_hash": "322517898482837905962037901991472629201"
},
"source": "https://github.com/freerdp/freerdp/commit/17c363a5162fd4dc77b1df54e48d7bd9bf6b3be7",
"target": {
"file": "libfreerdp/codec/zgfx.c",
"function": "zgfx_decompress_segment"
},
"deprecated": false,
"signature_type": "Function",
"signature_version": "v1"
}
],
"vanir_signatures_modified": "2026-10-20T13:35:50Z"
}
}
],
"modified": "2026-10-20T13:35:50.104680227Z",
"provider": "osv",
"references": [
"https://usn.ubuntu.com/3845-1/",
"https://github.com/FreeRDP/FreeRDP/commit/17c363a5162fd4dc77b1df54e48d7bd9bf6b3be7",
"https://research.checkpoint.com/reverse-rdp-attack-code-execution-on-rdp-clients/"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*"
],
"vendor_product": "freerdp:freerdp",
"extracted_events": [
{
"range": [
{
"last_affected": "1.2.0"
}
],
"source": "CPE_RANGE"
}
]
},
{
"cpes": [
"cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*"
],
"vendor_product": "canonical:ubuntu_linux",
"extracted_events": [
{
"range": [
{
"introduced": "18.04"
},
{
"last_affected": "18.04"
},
{
"introduced": "18.10"
},
{
"last_affected": "18.10"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2018-8784",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 387861,
"published_at": "2018-11-29T18:29:00.803+00:00"
}