525 lines
25 KiB
JSON
525 lines
25 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"cveMetadata": {
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"cveId": "CVE-2024-38587",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2024-06-18T19:36:34.929Z",
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"datePublished": "2024-06-19T13:37:42.537Z",
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"dateUpdated": "2026-10-15T00:43:31.450Z"
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nspeakup: Fix sizeof() vs ARRAY_SIZE() bug\n\nThe \"buf\" pointer is an array of u16 values. This code should be\nusing ARRAY_SIZE() (which is 256) instead of sizeof() (which is 512),\notherwise it can the still got out of bounds."
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"lang": "en",
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"value": "AV:L - The vulnerable path is reached only through the local virtual console — writing screen content to an owned VC, resizing it via VT_RESIZE, and a speakup KT_SPKUP keypress delivered through the keyboard notifier; there is no network or remote-peer input involved. CVSS 3.1 AV:L covers attacks performed by a local user of the system, including those relying on a console-local action.\nAC:L - Every precondition is under the attacker's control: the tty owner can set vc_cols>257 himself via VT_RESIZE (vgacon accepts any from_user width fitting VRAM), write the ≥257-character word with echo, place the reading cursor, and press the say-word key — a deterministic, repeatable overflow with no race and no memory-layout guessing.\nPR:L - Only an unprivileged local account with a virtual-console session is needed; VT_RESIZE and PIO_UNIMAP are granted to the tty owner without CAP_SYS_TTY_CONFIG (drivers/tty/vt/vt_ioctl.c:740), and writing to one's own /dev/ttyN requires no capability.\nUI:N - The attacker performs every step in his own console session — resize, print the long word, press the speakup key — so no second user has to be tricked into any action.\nS:U - The out-of-bounds write corrupts kernel .bss belonging to the speakup module, staying entirely within the kernel's own security authority with no crossing of a VM, IOMMU, or sandbox boundary.\nC:H - Overwriting adjacent pointer globals such as spk_characters[], spk_our_keys[], or the i18n message pointers with attacker-chosen 64-bit values turns speakup into an arbitrary kernel-memory read whose output is spoken out and readable from /dev/softsynth; the companion OOB read in spkup_write(buf, 512) also exposes adjacent kernel data.\nI:H - This is a 512-byte out-of-bounds write of fully attacker-chosen u16 values (arbitrary Unicode via a custom unimap) into a cluster of kernel pointers, including the spk_special_handler function pointer that is invoked directly on the next keypress — a direct control-flow hijack and arbitrary-write primitive.\nA:H - Corrupting neighbouring pointers such as tty, speakup_task, or speakup_console[] with garbage reliably produces an oops or panic even without a weaponized exploit, and the write can be repeated at will."
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"providerMetadata": {
|
|
"orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
|
|
"shortName": "siemens-SADP",
|
|
"dateUpdated": "2026-10-15T00:43:31.450Z"
|
|
},
|
|
"affected": [
|
|
{
|
|
"vendor": "Siemens",
|
|
"product": "RUGGEDCOM RST2428P",
|
|
"versions": [
|
|
{
|
|
"status": "affected",
|
|
"version": "0",
|
|
"lessThan": "V3.1",
|
|
"versionType": "custom"
|
|
}
|
|
],
|
|
"defaultStatus": "unknown"
|
|
},
|
|
{
|
|
"vendor": "Siemens",
|
|
"product": "SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family",
|
|
"versions": [
|
|
{
|
|
"status": "unaffected",
|
|
"version": "0",
|
|
"lessThan": "*",
|
|
"versionType": "custom"
|
|
}
|
|
],
|
|
"defaultStatus": "unknown"
|
|
},
|
|
{
|
|
"vendor": "Siemens",
|
|
"product": "SCALANCE XCM-/XRM-/XCH-/XRH-300 family",
|
|
"versions": [
|
|
{
|
|
"status": "affected",
|
|
"version": "0",
|
|
"lessThan": "V3.1",
|
|
"versionType": "custom"
|
|
}
|
|
],
|
|
"defaultStatus": "unknown"
|
|
},
|
|
{
|
|
"vendor": "Siemens",
|
|
"product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem",
|
|
"versions": [
|
|
{
|
|
"status": "affected",
|
|
"version": "0",
|
|
"lessThan": "V1.1.1",
|
|
"versionType": "custom"
|
|
}
|
|
],
|
|
"defaultStatus": "unknown"
|
|
}
|
|
],
|
|
"references": [
|
|
{
|
|
"url": "https://cert-portal.siemens.com/productcert/html/ssa-265688.html"
|
|
},
|
|
{
|
|
"url": "https://cert-portal.siemens.com/productcert/html/ssa-613116.html"
|
|
}
|
|
]
|
|
}
|
|
]
|
|
},
|
|
"dataVersion": "5.2"
|
|
} |