CWE-125
AllowedOut-of-bounds Read
Abstraction: Base · Status: Draft
The product reads data past the end, or before the beginning, of the intended buffer.
12381 vulnerabilities reference this CWE, most recent first.
GHSA-XFXG-X8WP-XH52
Vulnerability from github – Published: 2022-02-19 00:01 – Updated: 2022-03-01 00:00This vulnerability allows remote attackers to disclose sensitive information on affected installations of Bentley MicroStation CONNECT 10.16.0.80. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of DGN files. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the current process. Was ZDI-CAN-15537.
{
"affected": [],
"aliases": [
"CVE-2021-46651"
],
"database_specific": {
"cwe_ids": [
"CWE-125"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-02-18T20:15:00Z",
"severity": "MODERATE"
},
"details": "This vulnerability allows remote attackers to disclose sensitive information on affected installations of Bentley MicroStation CONNECT 10.16.0.80. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of DGN files. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the current process. Was ZDI-CAN-15537.",
"id": "GHSA-xfxg-x8wp-xh52",
"modified": "2022-03-01T00:00:51Z",
"published": "2022-02-19T00:01:04Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-46651"
},
{
"type": "WEB",
"url": "https://www.bentley.com/en/common-vulnerability-exposure/BE-2021-0009"
},
{
"type": "WEB",
"url": "https://www.zerodayinitiative.com/advisories/ZDI-22-238"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-XG22-883P-M58M
Vulnerability from github – Published: 2025-02-27 03:34 – Updated: 2025-03-06 12:30In the Linux kernel, the following vulnerability has been resolved:
usbnet: ipheth: use static NDP16 location in URB
Original code allowed for the start of NDP16 to be anywhere within the
URB based on the wNdpIndex value in NTH16. Only the start position of
NDP16 was checked, so it was possible for even the fixed-length part
of NDP16 to extend past the end of URB, leading to an out-of-bounds
read.
On iOS devices, the NDP16 header always directly follows NTH16. Rely on and check for this specific format.
This, along with NCM-specific minimal URB length check that already exists, will ensure that the fixed-length part of NDP16 plus a set amount of DPEs fit within the URB.
Note that this commit alone does not fully address the OoB read. The limit on the amount of DPEs needs to be enforced separately.
{
"affected": [],
"aliases": [
"CVE-2025-21742"
],
"database_specific": {
"cwe_ids": [
"CWE-125"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-02-27T03:15:14Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nusbnet: ipheth: use static NDP16 location in URB\n\nOriginal code allowed for the start of NDP16 to be anywhere within the\nURB based on the `wNdpIndex` value in NTH16. Only the start position of\nNDP16 was checked, so it was possible for even the fixed-length part\nof NDP16 to extend past the end of URB, leading to an out-of-bounds\nread.\n\nOn iOS devices, the NDP16 header always directly follows NTH16. Rely on\nand check for this specific format.\n\nThis, along with NCM-specific minimal URB length check that already\nexists, will ensure that the fixed-length part of NDP16 plus a set\namount of DPEs fit within the URB.\n\nNote that this commit alone does not fully address the OoB read.\nThe limit on the amount of DPEs needs to be enforced separately.",
"id": "GHSA-xg22-883p-m58m",
"modified": "2025-03-06T12:30:42Z",
"published": "2025-02-27T03:34:04Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-21742"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2b619445dcb6dab97d8ed033fb57225aca1288c4"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/86586dcb75cb8fd062a518aca8ee667938b91efb"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8fb062178e1ce180e2cfdc9abc83a1b9fea381ca"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/cf1ac7f7cf601ac31d1580559c002b5e37b733b7"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-XG28-VM4V-PCGP
Vulnerability from github – Published: 2025-08-22 18:31 – Updated: 2025-11-26 18:31In the Linux kernel, the following vulnerability has been resolved:
rv: Use strings in da monitors tracepoints
Using DA monitors tracepoints with KASAN enabled triggers the following warning:
BUG: KASAN: global-out-of-bounds in do_trace_event_raw_event_event_da_monitor+0xd6/0x1a0 Read of size 32 at addr ffffffffaada8980 by task ... Call Trace: [...] do_trace_event_raw_event_event_da_monitor+0xd6/0x1a0 ? __pfx_do_trace_event_raw_event_event_da_monitor+0x10/0x10 ? trace_event_sncid+0x83/0x200 trace_event_sncid+0x163/0x200 [...] The buggy address belongs to the variable: automaton_snep+0x4e0/0x5e0
This is caused by the tracepoints reading 32 bytes __array instead of __string from the automata definition. Such strings are literals and reading 32 bytes ends up in out of bound memory accesses (e.g. the next automaton's data in this case). The error is harmless as, while printing the string, we stop at the null terminator, but it should still be fixed.
Use the __string facilities while defining the tracepoints to avoid reading out of bound memory.
{
"affected": [],
"aliases": [
"CVE-2025-38636"
],
"database_specific": {
"cwe_ids": [
"CWE-125"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-08-22T16:15:37Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nrv: Use strings in da monitors tracepoints\n\nUsing DA monitors tracepoints with KASAN enabled triggers the following\nwarning:\n\n BUG: KASAN: global-out-of-bounds in do_trace_event_raw_event_event_da_monitor+0xd6/0x1a0\n Read of size 32 at addr ffffffffaada8980 by task ...\n Call Trace:\n \u003cTASK\u003e\n [...]\n do_trace_event_raw_event_event_da_monitor+0xd6/0x1a0\n ? __pfx_do_trace_event_raw_event_event_da_monitor+0x10/0x10\n ? trace_event_sncid+0x83/0x200\n trace_event_sncid+0x163/0x200\n [...]\n The buggy address belongs to the variable:\n automaton_snep+0x4e0/0x5e0\n\nThis is caused by the tracepoints reading 32 bytes __array instead of\n__string from the automata definition. Such strings are literals and\nreading 32 bytes ends up in out of bound memory accesses (e.g. the next\nautomaton\u0027s data in this case).\nThe error is harmless as, while printing the string, we stop at the null\nterminator, but it should still be fixed.\n\nUse the __string facilities while defining the tracepoints to avoid\nreading out of bound memory.",
"id": "GHSA-xg28-vm4v-pcgp",
"modified": "2025-11-26T18:31:00Z",
"published": "2025-08-22T18:31:22Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38636"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0ebc70d973ce7a81826b5c4f55f743e07f5864d9"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/7f904ff6e58d398c4336f3c19c42b338324451f7"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-XG29-9VRX-M2QC
Vulnerability from github – Published: 2022-11-09 19:02 – Updated: 2022-11-09 19:02In WAGO I/O-Check Service in multiple products an unauthenticated remote attacker can send a specially crafted packet containing OS commands to provoke a denial of service and an limited out-of-bounds read.
{
"affected": [],
"aliases": [
"CVE-2021-34567"
],
"database_specific": {
"cwe_ids": [
"CWE-125"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-11-09T16:15:00Z",
"severity": "HIGH"
},
"details": "In WAGO I/O-Check Service in multiple products an unauthenticated remote attacker can send a specially crafted packet containing OS commands to provoke a denial of service and an limited out-of-bounds read.",
"id": "GHSA-xg29-9vrx-m2qc",
"modified": "2022-11-09T19:02:23Z",
"published": "2022-11-09T19:02:23Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-34567"
},
{
"type": "WEB",
"url": "https://cert.vde.com/en/advisories/VDE-2020-036"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-XG3F-WMMQ-XC35
Vulnerability from github – Published: 2022-05-17 02:55 – Updated: 2025-04-20 03:34The read_new_config_info function in open_utils.c in Wavpack before 5.1.0 allows remote attackers to cause a denial of service (out-of-bounds read) via a crafted WV file.
{
"affected": [],
"aliases": [
"CVE-2016-10172"
],
"database_specific": {
"cwe_ids": [
"CWE-125"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2017-03-14T14:59:00Z",
"severity": "MODERATE"
},
"details": "The read_new_config_info function in open_utils.c in Wavpack before 5.1.0 allows remote attackers to cause a denial of service (out-of-bounds read) via a crafted WV file.",
"id": "GHSA-xg3f-wmmq-xc35",
"modified": "2025-04-20T03:34:02Z",
"published": "2022-05-17T02:55:27Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2016-10172"
},
{
"type": "WEB",
"url": "https://github.com/dbry/WavPack/commit/4bc05fc490b66ef2d45b1de26abf1455b486b0dc"
},
{
"type": "WEB",
"url": "https://sourceforge.net/p/wavpack/mailman/message/35561951"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2017/01/28/9"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/95883"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-XG3H-4FFH-V7H3
Vulnerability from github – Published: 2025-07-08 12:31 – Updated: 2025-07-08 12:31A vulnerability has been identified in Solid Edge SE2025 (All versions < V225.0 Update 5). The affected applications contain an out of bounds read past the end of an allocated structure while parsing specially crafted PAR files. This could allow an attacker to execute code in the context of the current process.
{
"affected": [],
"aliases": [
"CVE-2025-40739"
],
"database_specific": {
"cwe_ids": [
"CWE-125"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-07-08T11:15:30Z",
"severity": "HIGH"
},
"details": "A vulnerability has been identified in Solid Edge SE2025 (All versions \u003c V225.0 Update 5). The affected applications contain an out of bounds read past the end of an allocated structure while parsing specially crafted PAR files.\nThis could allow an attacker to execute code in the context of the current process.",
"id": "GHSA-xg3h-4ffh-v7h3",
"modified": "2025-07-08T12:31:02Z",
"published": "2025-07-08T12:31:02Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-40739"
},
{
"type": "WEB",
"url": "https://cert-portal.siemens.com/productcert/html/ssa-091753.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-XG55-JQ33-CF6C
Vulnerability from github – Published: 2022-05-14 01:01 – Updated: 2025-04-20 03:33An issue was discovered in ytnef before 1.9.2. There is a potential out-of-bounds access with fields of Size 0 in TNEFParse() in libytnef.
{
"affected": [],
"aliases": [
"CVE-2017-6801"
],
"database_specific": {
"cwe_ids": [
"CWE-125"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2017-03-10T10:59:00Z",
"severity": "HIGH"
},
"details": "An issue was discovered in ytnef before 1.9.2. There is a potential out-of-bounds access with fields of Size 0 in TNEFParse() in libytnef.",
"id": "GHSA-xg55-jq33-cf6c",
"modified": "2025-04-20T03:33:57Z",
"published": "2022-05-14T01:01:12Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-6801"
},
{
"type": "WEB",
"url": "https://github.com/Yeraze/ytnef/commit/3cb0f914d6427073f262e1b2b5fd973e3043cdf7"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LFJWMUEUC4ILH2HEOCYVVLQT654ZMCGQ"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LFJWMUEUC4ILH2HEOCYVVLQT654ZMCGQ"
},
{
"type": "WEB",
"url": "http://www.debian.org/security/2017/dsa-3846"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-XG7F-9M4R-JH69
Vulnerability from github – Published: 2022-05-14 01:09 – Updated: 2022-05-14 01:09The matchCurrentInput function inside lou_translateString.c of Liblouis prior to 3.7 does not check the input string's length, allowing attackers to cause a denial of service (application crash via out-of-bounds read) by crafting an input file with certain translation dictionaries.
{
"affected": [],
"aliases": [
"CVE-2018-17294"
],
"database_specific": {
"cwe_ids": [
"CWE-125"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-09-21T07:29:00Z",
"severity": "MODERATE"
},
"details": "The matchCurrentInput function inside lou_translateString.c of Liblouis prior to 3.7 does not check the input string\u0027s length, allowing attackers to cause a denial of service (application crash via out-of-bounds read) by crafting an input file with certain translation dictionaries.",
"id": "GHSA-xg7f-9m4r-jh69",
"modified": "2022-05-14T01:09:23Z",
"published": "2022-05-14T01:09:23Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-17294"
},
{
"type": "WEB",
"url": "https://github.com/liblouis/liblouis/issues/635"
},
{
"type": "WEB",
"url": "https://github.com/liblouis/liblouis/commit/5e4089659bb49b3095fa541fa6387b4c40d7396e"
},
{
"type": "WEB",
"url": "https://usn.ubuntu.com/3782-1"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00038.html"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/105511"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-XG8Q-RR62-82PP
Vulnerability from github – Published: 2026-07-19 12:30 – Updated: 2026-07-24 15:32In the Linux kernel, the following vulnerability has been resolved:
ksmbd: fix out-of-bounds read in smb_check_perm_dacl()
The permission-check ACE walk in smb_check_perm_dacl() validates the ACE header size and caps sid.num_subauth at SID_MAX_SUB_AUTHORITIES, but it never checks that ace->size is actually large enough to contain num_subauth sub-authorities before compare_sids() dereferences them.
CIFS_SID_BASE_SIZE covers the SID header up to but excluding the sub_auth[] array, and offsetof(struct smb_ace, sid) is the ACE header, so the existing guards only guarantee the 8-byte SID base, i.e. zero sub-authorities. compare_sids() then reads ace->sid.sub_auth[i] for i < min(local_sid->num_subauth, ace->sid.num_subauth). The local comparison SIDs (sid_everyone, sid_unix_NFS_mode, and the id_to_sid() result) always have at least one sub-authority, and an attacker controls the ACE revision and authority bytes (which lie within the in-bounds SID base), so they can match one of those SIDs and force the sub_auth read.
A crafted ACE with size == 16 and num_subauth >= 1 placed at the tail of the security descriptor therefore causes a heap out-of-bounds read of up to SID_MAX_SUB_AUTHORITIES * sizeof(__le32) bytes past the pntsd allocation. The security descriptor is loaded by ksmbd_vfs_get_sd_xattr() into a buffer sized exactly to the on-disk data (kzalloc(sd_size) in ndr_decode_v4_ntacl()), so the read lands past the allocation. The malformed descriptor can be stored verbatim via SMB2_SET_INFO (the DACL is not normalised before being written to the security.NTACL xattr) and the read fires on a subsequent SMB2_CREATE access check, making this reachable by an authenticated client on a share that uses ACL xattrs.
Add the missing num_subauth-versus-ace_size check, mirroring the identical guards already present in the sibling parsers parse_dacl() and smb_inherit_dacl().
{
"affected": [],
"aliases": [
"CVE-2026-53390"
],
"database_specific": {
"cwe_ids": [
"CWE-125"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-19T12:16:50Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix out-of-bounds read in smb_check_perm_dacl()\n\nThe permission-check ACE walk in smb_check_perm_dacl() validates the ACE\nheader size and caps sid.num_subauth at SID_MAX_SUB_AUTHORITIES, but it\nnever checks that ace-\u003esize is actually large enough to contain\nnum_subauth sub-authorities before compare_sids() dereferences them.\n\nCIFS_SID_BASE_SIZE covers the SID header up to but excluding the\nsub_auth[] array, and offsetof(struct smb_ace, sid) is the ACE header,\nso the existing guards only guarantee the 8-byte SID base, i.e. zero\nsub-authorities. compare_sids() then reads ace-\u003esid.sub_auth[i] for\ni \u003c min(local_sid-\u003enum_subauth, ace-\u003esid.num_subauth). The local\ncomparison SIDs (sid_everyone, sid_unix_NFS_mode, and the id_to_sid()\nresult) always have at least one sub-authority, and an attacker controls\nthe ACE revision and authority bytes (which lie within the in-bounds SID\nbase), so they can match one of those SIDs and force the sub_auth read.\n\nA crafted ACE with size == 16 and num_subauth \u003e= 1 placed at the tail of\nthe security descriptor therefore causes a heap out-of-bounds read of up\nto SID_MAX_SUB_AUTHORITIES * sizeof(__le32) bytes past the pntsd\nallocation. The security descriptor is loaded by ksmbd_vfs_get_sd_xattr()\ninto a buffer sized exactly to the on-disk data (kzalloc(sd_size) in\nndr_decode_v4_ntacl()), so the read lands past the allocation. The\nmalformed descriptor can be stored verbatim via SMB2_SET_INFO (the DACL\nis not normalised before being written to the security.NTACL xattr) and\nthe read fires on a subsequent SMB2_CREATE access check, making this\nreachable by an authenticated client on a share that uses ACL xattrs.\n\nAdd the missing num_subauth-versus-ace_size check, mirroring the\nidentical guards already present in the sibling parsers parse_dacl() and\nsmb_inherit_dacl().",
"id": "GHSA-xg8q-rr62-82pp",
"modified": "2026-07-24T15:32:42Z",
"published": "2026-07-19T12:30:22Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53390"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1ef06004ed4bd6d3ed8c840d9d1a376b66d4935b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/36599894fa8536fefdf1e296c0af71b8b7226859"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/7627ff8c4f9919f14de562b0160ab4ec9d80b1f7"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/988c93d3bba066d8669143e6ec30bb2be9608d53"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c7488c85fd822959e9b5c22fbd9e7c8a21caf5e0"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d5c81a095c86fe507c032d08f3a8cfc518444927"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e36e35660adb9b8ef1435ac359151dda5f094c55"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-XG8R-6FGF-CRXR
Vulnerability from github – Published: 2022-05-24 17:49 – Updated: 2022-05-24 17:49This vulnerability allows local attackers to disclose sensitive information on affected installations of Parallels Desktop 15.1.5-47309. An attacker must first obtain the ability to execute high-privileged code on the target guest system in order to exploit this vulnerability. The specific flaw exists within the IDE virtual device. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to escalate privileges and execute arbitrary code in the context of the hypervisor. Was ZDI-CAN-13190.
{
"affected": [],
"aliases": [
"CVE-2021-31432"
],
"database_specific": {
"cwe_ids": [
"CWE-125"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-04-29T17:15:00Z",
"severity": "MODERATE"
},
"details": "This vulnerability allows local attackers to disclose sensitive information on affected installations of Parallels Desktop 15.1.5-47309. An attacker must first obtain the ability to execute high-privileged code on the target guest system in order to exploit this vulnerability. The specific flaw exists within the IDE virtual device. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to escalate privileges and execute arbitrary code in the context of the hypervisor. Was ZDI-CAN-13190.",
"id": "GHSA-xg8r-6fgf-crxr",
"modified": "2022-05-24T17:49:08Z",
"published": "2022-05-24T17:49:08Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-31432"
},
{
"type": "WEB",
"url": "https://kb.parallels.com/en/125013"
},
{
"type": "WEB",
"url": "https://www.zerodayinitiative.com/advisories/ZDI-21-440"
}
],
"schema_version": "1.4.0",
"severity": []
}
Mitigation MIT-5
Strategy: Input Validation
- Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
- When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, "boat" may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as "red" or "blue."
- Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code's environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.
- To reduce the likelihood of introducing an out-of-bounds read, ensure that you validate and ensure correct calculations for any length argument, buffer size calculation, or offset. Be especially careful of relying on a sentinel (i.e. special character such as NUL) in untrusted inputs.
Mitigation
Strategy: Language Selection
Use a language that provides appropriate memory abstractions.
CAPEC-540: Overread Buffers
An adversary attacks a target by providing input that causes an application to read beyond the boundary of a defined buffer. This typically occurs when a value influencing where to start or stop reading is set to reflect positions outside of the valid memory location of the buffer. This type of attack may result in exposure of sensitive information, a system crash, or arbitrary code execution.