{ "dataType": "CVE_RECORD", "cveMetadata": { "cveId": "CVE-2024-35944", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-05-17T13:50:33.133Z", "datePublished": "2024-05-19T10:10:48.183Z", "dateUpdated": "2024-08-02T03:21:49.080Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-05-29T05:31:42.304Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nVMCI: Fix memcpy() run-time warning in dg_dispatch_as_host()\n\nSyzkaller hit 'WARNING in dg_dispatch_as_host' bug.\n\nmemcpy: detected field-spanning write (size 56) of single field \"&dg_info->msg\"\nat drivers/misc/vmw_vmci/vmci_datagram.c:237 (size 24)\n\nWARNING: CPU: 0 PID: 1555 at drivers/misc/vmw_vmci/vmci_datagram.c:237\ndg_dispatch_as_host+0x88e/0xa60 drivers/misc/vmw_vmci/vmci_datagram.c:237\n\nSome code commentry, based on my understanding:\n\n544 #define VMCI_DG_SIZE(_dg) (VMCI_DG_HEADERSIZE + (size_t)(_dg)->payload_size)\n/// This is 24 + payload_size\n\nmemcpy(&dg_info->msg, dg, dg_size);\n\tDestination = dg_info->msg ---> this is a 24 byte\n\t\t\t\t\tstructure(struct vmci_datagram)\n\tSource = dg --> this is a 24 byte structure (struct vmci_datagram)\n\tSize = dg_size = 24 + payload_size\n\n{payload_size = 56-24 =32} -- Syzkaller managed to set payload_size to 32.\n\n 35 struct delayed_datagram_info {\n 36 struct datagram_entry *entry;\n 37 struct work_struct work;\n 38 bool in_dg_host_queue;\n 39 /* msg and msg_payload must be together. */\n 40 struct vmci_datagram msg;\n 41 u8 msg_payload[];\n 42 };\n\nSo those extra bytes of payload are copied into msg_payload[], a run time\nwarning is seen while fuzzing with Syzkaller.\n\nOne possible way to fix the warning is to split the memcpy() into\ntwo parts -- one -- direct assignment of msg and second taking care of payload.\n\nGustavo quoted:\n\"Under FORTIFY_SOURCE we should not copy data across multiple members\nin a structure.\"" } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/misc/vmw_vmci/vmci_datagram.c" ], "versions": [ { "version": "1da177e4c3f4", "lessThan": "e87bb99d2df6", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f4", "lessThan": "f15eca95138b", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f4", "lessThan": "ad78c5047dc4", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f4", "lessThan": "130b0cd06487", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f4", "lessThan": "feacd430b42b", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f4", "lessThan": "dae70a575656", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f4", "lessThan": "491a1eb07c2b", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f4", "lessThan": "19b070fefd0d", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/misc/vmw_vmci/vmci_datagram.c" ], "versions": [ { "version": "4.19.312", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.4.274", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.10.215", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.15.155", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.1.86", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.6.27", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.8.6", "lessThanOrEqual": "6.8.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.9", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/e87bb99d2df6512d8ee37a5d63d2ca9a39a8c051" }, { "url": "https://git.kernel.org/stable/c/f15eca95138b3d4ec17b63c3c1937b0aa0d3624b" }, { "url": "https://git.kernel.org/stable/c/ad78c5047dc4076d0b3c4fad4f42ffe9c86e8100" }, { "url": "https://git.kernel.org/stable/c/130b0cd064874e0d0f58e18fb00e6f3993e90c74" }, { "url": "https://git.kernel.org/stable/c/feacd430b42bbfa9ab3ed9e4f38b86c43e348c75" }, { "url": "https://git.kernel.org/stable/c/dae70a57565686f16089737adb8ac64471570f73" }, { "url": "https://git.kernel.org/stable/c/491a1eb07c2bd8841d63cb5263455e185be5866f" }, { "url": "https://git.kernel.org/stable/c/19b070fefd0d024af3daa7329cbc0d00de5302ec" }, { "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html" }, { "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html" } ], "title": "VMCI: Fix memcpy() run-time warning in dg_dispatch_as_host()", "x_generator": { "engine": "bippy-a5840b7849dd" } }, "adp": [ { "title": "CISA ADP Vulnrichment", "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2024-35944", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-05-20T14:30:02.800597Z" } } } ], "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-04T17:34:54.146Z" } }, { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T03:21:49.080Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/e87bb99d2df6512d8ee37a5d63d2ca9a39a8c051", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/f15eca95138b3d4ec17b63c3c1937b0aa0d3624b", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/ad78c5047dc4076d0b3c4fad4f42ffe9c86e8100", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/130b0cd064874e0d0f58e18fb00e6f3993e90c74", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/feacd430b42bbfa9ab3ed9e4f38b86c43e348c75", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/dae70a57565686f16089737adb8ac64471570f73", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/491a1eb07c2bd8841d63cb5263455e185be5866f", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/19b070fefd0d024af3daa7329cbc0d00de5302ec", "tags": [ "x_transferred" ] }, { "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html", "tags": [ "x_transferred" ] }, { "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html", "tags": [ "x_transferred" ] } ] } ] }, "dataVersion": "5.1" }