CWE-787
Allowed-with-ReviewOut-of-bounds Write
Abstraction: Base · Status: Draft
The product writes data past the end, or before the beginning, of the intended buffer.
15201 vulnerabilities reference this CWE, most recent first.
GHSA-43PM-H7C8-JR2M
Vulnerability from github – Published: 2022-05-13 01:18 – Updated: 2022-05-13 01:18Microsoft Edge in Windows 10 1709 allows an attacker to execute arbitrary code in the context of the current user, due to how the scripting engine handles objects in memory, aka "Scripting Engine Memory Corruption Vulnerability". This CVE ID is unique from CVE-2018-0758, CVE-2018-0762, CVE-2018-0768, CVE-2018-0769, CVE-2018-0770, CVE-2018-0772, CVE-2018-0773, CVE-2018-0774, CVE-2018-0775, CVE-2018-0776, CVE-2018-0777, and CVE-2018-0781.
{
"affected": [],
"aliases": [
"CVE-2018-0778"
],
"database_specific": {
"cwe_ids": [
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-01-04T14:29:00Z",
"severity": "HIGH"
},
"details": "Microsoft Edge in Windows 10 1709 allows an attacker to execute arbitrary code in the context of the current user, due to how the scripting engine handles objects in memory, aka \"Scripting Engine Memory Corruption Vulnerability\". This CVE ID is unique from CVE-2018-0758, CVE-2018-0762, CVE-2018-0768, CVE-2018-0769, CVE-2018-0770, CVE-2018-0772, CVE-2018-0773, CVE-2018-0774, CVE-2018-0775, CVE-2018-0776, CVE-2018-0777, and CVE-2018-0781.",
"id": "GHSA-43pm-h7c8-jr2m",
"modified": "2022-05-13T01:18:28Z",
"published": "2022-05-13T01:18:28Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-0778"
},
{
"type": "WEB",
"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0778"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/102403"
},
{
"type": "WEB",
"url": "http://www.securitytracker.com/id/1040100"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-43R2-VC56-G759
Vulnerability from github – Published: 2022-05-24 16:50 – Updated: 2026-06-05 21:31Linaro/OP-TEE OP-TEE 3.3.0 and earlier is affected by: Boundary crossing. The impact is: Memory corruption of the TEE itself. The component is: optee_os. The fixed version is: 3.4.0 and later.
{
"affected": [],
"aliases": [
"CVE-2019-1010293"
],
"database_specific": {
"cwe_ids": [
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2019-07-15T18:15:00Z",
"severity": "CRITICAL"
},
"details": "Linaro/OP-TEE OP-TEE 3.3.0 and earlier is affected by: Boundary crossing. The impact is: Memory corruption of the TEE itself. The component is: optee_os. The fixed version is: 3.4.0 and later.",
"id": "GHSA-43r2-vc56-g759",
"modified": "2026-06-05T21:31:47Z",
"published": "2022-05-24T16:50:17Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-1010293"
},
{
"type": "WEB",
"url": "https://github.com/OP-TEE/optee_os/commit/95f36d661f2b75887772ea28baaad904bde96970"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-43W2-9J62-HQ99
Vulnerability from github – Published: 2022-05-24 17:40 – Updated: 2023-06-13 20:51A bug in the SmallVec::insert_many method caused it to allocate a buffer that was smaller than needed. It then wrote past the end of the buffer, causing a buffer overflow and memory corruption on the heap. This bug was only triggered if the iterator passed to insert_many yielded more items than the lower bound returned from its size_hint method.
The flaw was corrected in smallvec 0.6.14 and 1.6.1, by ensuring that additional space is always reserved for each item inserted. The fix also simplified the implementation of insert_many to use less unsafe code, so it is easier to verify its correctness.
{
"affected": [
{
"package": {
"ecosystem": "crates.io",
"name": "smallvec"
},
"ranges": [
{
"events": [
{
"introduced": "0.6.3"
},
{
"fixed": "0.6.14"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "crates.io",
"name": "smallvec"
},
"ranges": [
{
"events": [
{
"introduced": "1.0.0"
},
{
"fixed": "1.6.1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2021-25900"
],
"database_specific": {
"cwe_ids": [
"CWE-787"
],
"github_reviewed": true,
"github_reviewed_at": "2022-06-17T00:20:48Z",
"nvd_published_at": "2021-01-26T18:16:00Z",
"severity": "CRITICAL"
},
"details": "A bug in the SmallVec::insert_many method caused it to allocate a buffer that was smaller than needed. It then wrote past the end of the buffer, causing a buffer overflow and memory corruption on the heap. This bug was only triggered if the iterator passed to insert_many yielded more items than the lower bound returned from its size_hint method.\n\nThe flaw was corrected in smallvec 0.6.14 and 1.6.1, by ensuring that additional space is always reserved for each item inserted. The fix also simplified the implementation of insert_many to use less unsafe code, so it is easier to verify its correctness.",
"id": "GHSA-43w2-9j62-hq99",
"modified": "2023-06-13T20:51:42Z",
"published": "2022-05-24T17:40:21Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-25900"
},
{
"type": "WEB",
"url": "https://github.com/servo/rust-smallvec/issues/252"
},
{
"type": "WEB",
"url": "https://github.com/servo/rust-smallvec/commit/5757ac500d4e544485d796b542e4e589749c291b"
},
{
"type": "WEB",
"url": "https://github.com/servo/rust-smallvec/commit/9998ba0694a6b51aa6604748b00b6a98f0a0039e"
},
{
"type": "PACKAGE",
"url": "https://github.com/servo/rust-smallvec"
},
{
"type": "WEB",
"url": "https://rustsec.org/advisories/RUSTSEC-2021-0003.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "Buffer overflow in SmallVec::insert_many"
}
GHSA-43W7-7GWV-35RC
Vulnerability from github – Published: 2024-03-11 18:31 – Updated: 2025-02-14 18:30In the Linux kernel, the following vulnerability has been resolved:
s390/vfio-ap: always filter entire AP matrix
The vfio_ap_mdev_filter_matrix function is called whenever a new adapter or domain is assigned to the mdev. The purpose of the function is to update the guest's AP configuration by filtering the matrix of adapters and domains assigned to the mdev. When an adapter or domain is assigned, only the APQNs associated with the APID of the new adapter or APQI of the new domain are inspected. If an APQN does not reference a queue device bound to the vfio_ap device driver, then it's APID will be filtered from the mdev's matrix when updating the guest's AP configuration.
Inspecting only the APID of the new adapter or APQI of the new domain will result in passing AP queues through to a guest that are not bound to the vfio_ap device driver under certain circumstances. Consider the following:
guest's AP configuration (all also assigned to the mdev's matrix): 14.0004 14.0005 14.0006 16.0004 16.0005 16.0006
unassign domain 4 unbind queue 16.0005 assign domain 4
When domain 4 is re-assigned, since only domain 4 will be inspected, the APQNs that will be examined will be: 14.0004 16.0004
Since both of those APQNs reference queue devices that are bound to the vfio_ap device driver, nothing will get filtered from the mdev's matrix when updating the guest's AP configuration. Consequently, queue 16.0005 will get passed through despite not being bound to the driver. This violates the linux device model requirement that a guest shall only be given access to devices bound to the device driver facilitating their pass-through.
To resolve this problem, every adapter and domain assigned to the mdev will be inspected when filtering the mdev's matrix.
{
"affected": [],
"aliases": [
"CVE-2024-26620"
],
"database_specific": {
"cwe_ids": [
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-03-11T18:15:19Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/vfio-ap: always filter entire AP matrix\n\nThe vfio_ap_mdev_filter_matrix function is called whenever a new adapter or\ndomain is assigned to the mdev. The purpose of the function is to update\nthe guest\u0027s AP configuration by filtering the matrix of adapters and\ndomains assigned to the mdev. When an adapter or domain is assigned, only\nthe APQNs associated with the APID of the new adapter or APQI of the new\ndomain are inspected. If an APQN does not reference a queue device bound to\nthe vfio_ap device driver, then it\u0027s APID will be filtered from the mdev\u0027s\nmatrix when updating the guest\u0027s AP configuration.\n\nInspecting only the APID of the new adapter or APQI of the new domain will\nresult in passing AP queues through to a guest that are not bound to the\nvfio_ap device driver under certain circumstances. Consider the following:\n\nguest\u0027s AP configuration (all also assigned to the mdev\u0027s matrix):\n14.0004\n14.0005\n14.0006\n16.0004\n16.0005\n16.0006\n\nunassign domain 4\nunbind queue 16.0005\nassign domain 4\n\nWhen domain 4 is re-assigned, since only domain 4 will be inspected, the\nAPQNs that will be examined will be:\n14.0004\n16.0004\n\nSince both of those APQNs reference queue devices that are bound to the\nvfio_ap device driver, nothing will get filtered from the mdev\u0027s matrix\nwhen updating the guest\u0027s AP configuration. Consequently, queue 16.0005\nwill get passed through despite not being bound to the driver. This\nviolates the linux device model requirement that a guest shall only be\ngiven access to devices bound to the device driver facilitating their\npass-through.\n\nTo resolve this problem, every adapter and domain assigned to the mdev will\nbe inspected when filtering the mdev\u0027s matrix.",
"id": "GHSA-43w7-7gwv-35rc",
"modified": "2025-02-14T18:30:46Z",
"published": "2024-03-11T18:31:09Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-26620"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/850fb7fa8c684a4c6bf0e4b6978f4ddcc5d43d11"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c69d821197611678533fb3eb784fc823b921349a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/cdd134d56138302976685e6c7bc4755450b3880e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d6b8d034b576f406af920a7bee81606c027b24c6"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-43WF-F52V-7WQ4
Vulnerability from github – Published: 2026-03-28 12:30 – Updated: 2026-03-28 12:30Mapscrn 2.0.3 contains a stack-based buffer overflow vulnerability that allows local attackers to execute arbitrary code by supplying an oversized input buffer. Attackers can craft a malicious buffer with junk data, return address, NOP instructions, and shellcode to overflow the stack and achieve code execution or denial of service.
{
"affected": [],
"aliases": [
"CVE-2017-20226"
],
"database_specific": {
"cwe_ids": [
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-03-28T12:16:01Z",
"severity": "HIGH"
},
"details": "Mapscrn 2.0.3 contains a stack-based buffer overflow vulnerability that allows local attackers to execute arbitrary code by supplying an oversized input buffer. Attackers can craft a malicious buffer with junk data, return address, NOP instructions, and shellcode to overflow the stack and achieve code execution or denial of service.",
"id": "GHSA-43wf-f52v-7wq4",
"modified": "2026-03-28T12:30:30Z",
"published": "2026-03-28T12:30:30Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-20226"
},
{
"type": "WEB",
"url": "https://www.exploit-db.com/exploits/42144"
},
{
"type": "WEB",
"url": "https://www.vulncheck.com/advisories/mapscrn-stack-based-buffer-overflow"
},
{
"type": "WEB",
"url": "http://ccross.msk.su"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/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-43XH-Q266-JR4X
Vulnerability from github – Published: 2022-05-14 02:00 – Updated: 2022-05-14 02:00ReadCode() in decompress.c in the HDF HDF5 through 1.10.3 library allows attackers to cause a denial of service (invalid write access) via a crafted HDF5 file. This issue was triggered while converting a GIF file to an HDF file.
{
"affected": [],
"aliases": [
"CVE-2018-17436"
],
"database_specific": {
"cwe_ids": [
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-09-24T14:29:00Z",
"severity": "MODERATE"
},
"details": "ReadCode() in decompress.c in the HDF HDF5 through 1.10.3 library allows attackers to cause a denial of service (invalid write access) via a crafted HDF5 file. This issue was triggered while converting a GIF file to an HDF file.",
"id": "GHSA-43xh-q266-jr4x",
"modified": "2022-05-14T02:00:07Z",
"published": "2022-05-14T02:00:07Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-17436"
},
{
"type": "WEB",
"url": "https://github.com/SegfaultMasters/covering360/tree/master/HDF5/vuln8#invalid-write-memory-access-in-decompressc"
}
],
"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-4425-FXH6-87FR
Vulnerability from github – Published: 2022-05-24 17:14 – Updated: 2025-10-22 00:31An elevation of privilege vulnerability exists in the way that the Windows Kernel handles objects in memory, aka 'Windows Kernel Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2020-0913, CVE-2020-1000, CVE-2020-1003.
{
"affected": [],
"aliases": [
"CVE-2020-1027"
],
"database_specific": {
"cwe_ids": [
"CWE-269",
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2020-04-15T15:15:00Z",
"severity": "HIGH"
},
"details": "An elevation of privilege vulnerability exists in the way that the Windows Kernel handles objects in memory, aka \u0027Windows Kernel Elevation of Privilege Vulnerability\u0027. This CVE ID is unique from CVE-2020-0913, CVE-2020-1000, CVE-2020-1003.",
"id": "GHSA-4425-fxh6-87fr",
"modified": "2025-10-22T00:31:52Z",
"published": "2022-05-24T17:14:37Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-1027"
},
{
"type": "WEB",
"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1027"
},
{
"type": "WEB",
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-1027"
},
{
"type": "WEB",
"url": "http://packetstormsecurity.com/files/168068/Windows-sxs-CNodeFactory-XMLParser_Element_doc_assembly_assemblyIdentity-Heap-Buffer-Overflow.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-4433-XJ2Q-MVJF
Vulnerability from github – Published: 2024-11-22 21:32 – Updated: 2024-11-22 21:32Kofax Power PDF JP2 File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Kofax Power PDF. 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 JP2 files. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-22044.
{
"affected": [],
"aliases": [
"CVE-2024-5513"
],
"database_specific": {
"cwe_ids": [
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-11-22T20:15:09Z",
"severity": "HIGH"
},
"details": "Kofax Power PDF JP2 File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Kofax Power PDF. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.\n\nThe specific flaw exists within the parsing of JP2 files. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-22044.",
"id": "GHSA-4433-xj2q-mvjf",
"modified": "2024-11-22T21:32:16Z",
"published": "2024-11-22T21:32:16Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-5513"
},
{
"type": "WEB",
"url": "https://www.zerodayinitiative.com/advisories/ZDI-24-556"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-4442-GQG3-5QVM
Vulnerability from github – Published: 2025-06-18 12:30 – Updated: 2025-11-14 21:30In the Linux kernel, the following vulnerability has been resolved:
misc: fastrpc: fix memory corruption on open
The probe session-duplication overflow check incremented the session count also when there were no more available sessions so that memory beyond the fixed-size slab-allocated session array could be corrupted in fastrpc_session_alloc() on open().
{
"affected": [],
"aliases": [
"CVE-2022-49950"
],
"database_specific": {
"cwe_ids": [
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-06-18T11:15:22Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmisc: fastrpc: fix memory corruption on open\n\nThe probe session-duplication overflow check incremented the session\ncount also when there were no more available sessions so that memory\nbeyond the fixed-size slab-allocated session array could be corrupted in\nfastrpc_session_alloc() on open().",
"id": "GHSA-4442-gqg3-5qvm",
"modified": "2025-11-14T21:30:27Z",
"published": "2025-06-18T12:30:36Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49950"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5cf2a57c7a01a0d7bdecf875a63682f542891b1b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/cf20c3533efc89578ace94fa20a9e63446223c72"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d245f43aab2b61195d8ebb64cef7b5a08c590ab4"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e0578e603065f120a8759b75e0d6c216c7078a39"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f8632b8bb53ebc005d8f24a68a0c1f9678c0e908"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-4444-8MHW-C9M5
Vulnerability from github – Published: 2022-05-24 19:05 – Updated: 2022-05-24 19:05There is a heap-buffer-overflow at jmem-poolman.c:165 in jmem_pools_collect_empty in JerryScript 2.2.0.
{
"affected": [],
"aliases": [
"CVE-2020-23303"
],
"database_specific": {
"cwe_ids": [
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-06-10T23:15:00Z",
"severity": "CRITICAL"
},
"details": "There is a heap-buffer-overflow at jmem-poolman.c:165 in jmem_pools_collect_empty in JerryScript 2.2.0.",
"id": "GHSA-4444-8mhw-c9m5",
"modified": "2022-05-24T19:05:14Z",
"published": "2022-05-24T19:05:14Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-23303"
},
{
"type": "WEB",
"url": "https://github.com/jerryscript-project/jerryscript/issues/3749"
}
],
"schema_version": "1.4.0",
"severity": []
}
Mitigation MIT-3
Strategy: Language Selection
- Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
- For example, many languages that perform their own memory management, such as Java and Perl, are not subject to buffer overflows. Other languages, such as Ada and C#, typically provide overflow protection, but the protection can be disabled by the programmer.
- Be wary that a language's interface to native code may still be subject to overflows, even if the language itself is theoretically safe.
Mitigation MIT-4.1
Strategy: Libraries or Frameworks
- Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
- Examples include the Safe C String Library (SafeStr) by Messier and Viega [REF-57], and the Strsafe.h library from Microsoft [REF-56]. These libraries provide safer versions of overflow-prone string-handling functions.
Mitigation MIT-10
Strategy: Environment Hardening
- Use automatic buffer overflow detection mechanisms that are offered by certain compilers or compiler extensions. Examples include: the Microsoft Visual Studio /GS flag, Fedora/Red Hat FORTIFY_SOURCE GCC flag, StackGuard, and ProPolice, which provide various mechanisms including canary-based detection and range/index checking.
- D3-SFCV (Stack Frame Canary Validation) from D3FEND [REF-1334] discusses canary-based detection in detail.
Mitigation MIT-9
- Consider adhering to the following rules when allocating and managing an application's memory:
- Double check that the buffer is as large as specified.
- When using functions that accept a number of bytes to copy, such as strncpy(), be aware that if the destination buffer size is equal to the source buffer size, it may not NULL-terminate the string.
- Check buffer boundaries if accessing the buffer in a loop and make sure there is no danger of writing past the allocated space.
- If necessary, truncate all input strings to a reasonable length before passing them to the copy and concatenation functions.
Mitigation MIT-11
Strategy: Environment Hardening
- Run or compile the software using features or extensions that randomly arrange the positions of a program's executable and libraries in memory. Because this makes the addresses unpredictable, it can prevent an attacker from reliably jumping to exploitable code.
- Examples include Address Space Layout Randomization (ASLR) [REF-58] [REF-60] and Position-Independent Executables (PIE) [REF-64]. Imported modules may be similarly realigned if their default memory addresses conflict with other modules, in a process known as "rebasing" (for Windows) and "prelinking" (for Linux) [REF-1332] using randomly generated addresses. ASLR for libraries cannot be used in conjunction with prelink since it would require relocating the libraries at run-time, defeating the whole purpose of prelinking.
- For more information on these techniques see D3-SAOR (Segment Address Offset Randomization) from D3FEND [REF-1335].
Mitigation MIT-12
Strategy: Environment Hardening
- Use a CPU and operating system that offers Data Execution Protection (using hardware NX or XD bits) or the equivalent techniques that simulate this feature in software, such as PaX [REF-60] [REF-61]. These techniques ensure that any instruction executed is exclusively at a memory address that is part of the code segment.
- For more information on these techniques see D3-PSEP (Process Segment Execution Prevention) from D3FEND [REF-1336].
Mitigation MIT-13
Replace unbounded copy functions with analogous functions that support length arguments, such as strcpy with strncpy. Create these if they are not available.
No CAPEC attack patterns related to this CWE.