133 lines
5.9 KiB
JSON
133 lines
5.9 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-29774",
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"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"state": "PUBLISHED",
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"assignerShortName": "GitHub_M",
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"dateReserved": "2026-03-04T16:26:02.897Z",
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"datePublished": "2026-03-13T17:26:58.208Z",
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"dateUpdated": "2026-03-16T17:05:01.346Z"
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},
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"containers": {
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"cna": {
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"title": "FreeRDP has a heap-buffer-overflow in avc420_yuv_to_rgb via OOB regionRects",
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-787",
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"lang": "en",
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"description": "CWE-787: Out-of-bounds Write",
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"type": "CWE"
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}
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]
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"attackComplexity": "LOW",
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"attackVector": "NETWORK",
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"availabilityImpact": "LOW",
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"baseScore": 5.3,
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"baseSeverity": "MEDIUM",
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"confidentialityImpact": "NONE",
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"integrityImpact": "NONE",
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"privilegesRequired": "NONE",
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"scope": "UNCHANGED",
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"userInteraction": "NONE",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
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"version": "3.1"
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}
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}
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],
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"references": [
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{
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"name": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-5q35-hv9x-7794",
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"tags": [
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"x_refsource_CONFIRM"
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],
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"url": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-5q35-hv9x-7794"
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},
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{
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"name": "https://github.com/FreeRDP/FreeRDP/commit/6482b7a92fff3959582cef052d1967ad6bde3738",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/FreeRDP/FreeRDP/commit/6482b7a92fff3959582cef052d1967ad6bde3738"
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}
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],
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"affected": [
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{
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"vendor": "FreeRDP",
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"product": "FreeRDP",
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"versions": [
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{
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"version": "< 3.24.0",
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"status": "affected"
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}
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]
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}
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],
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"providerMetadata": {
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"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"shortName": "GitHub_M",
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"dateUpdated": "2026-03-13T17:26:58.208Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.24.0, a client-side heap buffer overflow occurs in the FreeRDP client's AVC420/AVC444 YUV-to-RGB conversion path due to missing horizontal bounds validation of H.264 metablock regionRects coordinates. In yuv.c, the clamp() function (line 347) only validates top/bottom against the surface/YUV height, but never checks left/right against the surface width. When avc420_yuv_to_rgb (line 67) computes destination and source pointers using rect->left, it performs unchecked pointer arithmetic that can reach far beyond the allocated surface buffer. A malicious server sends a WIRE_TO_SURFACE_PDU_1 with AVC420 codec containing a regionRects entry where left greatly exceeds the surface width (e.g., left=60000 on a 128px surface). The H.264 bitstream decodes successfully, then yuv420_process_work_callback calls avc420_yuv_to_rgb which computes pDstPoint = pDstData + rect->top * nDstStep + rect->left * 4, writing 16-byte SSE vectors 1888+ bytes past the allocated heap region. This vulnerability is fixed in 3.24.0."
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}
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],
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"source": {
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"advisory": "GHSA-5q35-hv9x-7794",
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"discovery": "UNKNOWN"
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}
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},
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"adp": [
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{
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"references": [
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{
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"url": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-5q35-hv9x-7794",
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"tags": [
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"exploit"
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]
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}
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],
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2026-03-16T17:04:57.793786Z",
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"id": "CVE-2026-29774",
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"options": [
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{
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"Exploitation": "poc"
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},
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{
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"Automatable": "yes"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-03-16T17:05:01.346Z"
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}
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}
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]
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}
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} |