CWE-787
Weakness 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.
Dimensions
- Behavior-Type: Write
- Resource-Type: Memory Buffer
- Resource-Property: Out-of-bounds
Mapping guidance
This CWE entry is at the Base level of abstraction, which is a preferred level of abstraction for mapping to the root causes of vulnerabilities. However, closer examination is required.
While this CWE is allowed for mapping, it has more specific children that might be a better fit. Carefully read both the name and description to ensure that this mapping is appropriate. Consider the root cause errors that have led to the out-of-bounds write by examining "CanFollow" relationships for this entry.
Relationships and members
Modes of introduction
Detection methods
Automated Static Analysis
This weakness can often be detected using automated static analysis tools. Many modern tools use data flow analysis or constraint-based techniques to minimize the number of false positives.
Automated static analysis generally does not account for environmental considerations when reporting out-of-bounds memory operations. This can make it difficult for users to determine which warnings should be investigated first. For example, an analysis tool might report buffer overflows that originate from command line arguments in a program that is not expected to run with setuid or other special privileges.
Effectiveness: High
Detection techniques for buffer-related errors are more mature than for most other weakness types.
Automated Dynamic Analysis
This weakness can be detected using dynamic tools and techniques that interact with the software using large test suites with many diverse inputs, such as fuzz testing (fuzzing), robustness testing, and fault injection. The software's operation may slow down, but it should not become unstable, crash, or generate incorrect results.
Automated Dynamic Analysis
Use tools that are integrated during compilation to insert runtime error-checking mechanisms related to memory safety errors, such as AddressSanitizer (ASan) for C/C++ [REF-1518].
Effectiveness: Moderate
Crafted inputs are necessary to reach the code containing the error, such as generated by fuzzers. Also, these tools may reduce performance, and they only report the error condition - not the original mistake that led to the error.
Content history
Suggested mappings to ISA/IEC 62443.
Provided diagram to improve CWE usability
updated Demonstrative_Examples
updated Relationships
updated Common_Consequences
updated Demonstrative_Examples
updated Relationships
updated Description
updated Applicable_Platforms, Demonstrative_Examples, Detection_Factors, Likelihood_of_Exploit, Observed_Examples, Potential_Mitigations, References, Relationships, Time_of_Introduction
updated Observed_Examples, Relationships
updated Observed_Examples
updated Alternate_Terms, Demonstrative_Examples, Observed_Examples, Relationships
updated Relationships
updated Demonstrative_Examples
updated Demonstrative_Examples, Potential_Mitigations, Relationships
updated Observed_Examples, Relationships
updated Applicable_Platforms
updated Alternate_Terms, Demonstrative_Examples, Description
updated Potential_Mitigations, References, Relationships, Taxonomy_Mappings
updated Mapping_Notes, Relationships, Taxonomy_Mappings
updated Demonstrative_Examples
updated Alternate_Terms, Common_Consequences, Description, Diagram, Weakness_Ordinalities
updated Observed_Examples, Relationships
updated Observed_Examples, Relationships
updated Affected_Resources, Functional_Areas, References
updated Applicable_Platforms, Detection_Factors, References, Relationships
updated Mapping_Notes
updated Dimensions, Observed_Examples, References, Relationships, Taxonomy_Mappings
17075 vulnerabilities reference this CWE, most recent first.
GHSA-W256-997X-8W3F
Vulnerability from github – Published: 2025-10-14 15:31 – Updated: 2025-10-22 15:31APTIOV contains a vulnerability in BIOS where an attacker may cause an Out-of-bounds Write by local. Successful exploitation of this vulnerability may lead to data corruption and loss of availability.
{
"affected": [],
"aliases": [
"CVE-2025-22832"
],
"database_specific": {
"cwe_ids": [
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-10-14T14:15:49Z",
"severity": "MODERATE"
},
"details": "APTIOV contains a vulnerability in BIOS where an attacker may cause an Out-of-bounds Write by local. Successful exploitation of this vulnerability may lead to data corruption and loss of availability.",
"id": "GHSA-w256-997x-8w3f",
"modified": "2025-10-22T15:31:06Z",
"published": "2025-10-14T15:31:27Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-22832"
},
{
"type": "WEB",
"url": "https://go.ami.com/hubfs/Security%20Advisories/2025/AMI-SA-2025008.pdf"
}
],
"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"
},
{
"score": "CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/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-W28F-V4HJ-9FXG
Vulnerability from github – Published: 2024-06-25 06:30 – Updated: 2024-07-03 18:46A maliciously crafted 3DM file, when parsed in opennurbs.dll through Autodesk applications, can force an Out-of-Bounds Write. A malicious actor can leverage this vulnerability to cause a crash, write sensitive data, or execute arbitrary code in the context of the current process.
{
"affected": [],
"aliases": [
"CVE-2024-36999"
],
"database_specific": {
"cwe_ids": [
"CWE-125",
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-06-25T04:15:15Z",
"severity": "HIGH"
},
"details": "A maliciously crafted 3DM file, when parsed in opennurbs.dll through Autodesk applications, can force an Out-of-Bounds Write. A malicious actor can leverage this vulnerability to cause a crash, write sensitive data, or execute arbitrary code in the context of the current process.",
"id": "GHSA-w28f-v4hj-9fxg",
"modified": "2024-07-03T18:46:52Z",
"published": "2024-06-25T06:30:39Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-36999"
},
{
"type": "WEB",
"url": "https://www.autodesk.com/trust/security-advisories/adsk-sa-2024-0010"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-W29R-974P-F67J
Vulnerability from github – Published: 2022-05-13 01:01 – Updated: 2022-05-13 01:01An exploitable out-of-bounds write exists in the Microsoft Word document conversion functionality of the Antenna House Office Server Document Converter version V6.1 Pro MR2 for Linux64 (6,1,2018,0312). A crafted Microsoft Word (DOC) document can lead to an out-of-bounds write, resulting in remote code execution. This vulnerability occurs in the vbputanld method.
{
"affected": [],
"aliases": [
"CVE-2018-3933"
],
"database_specific": {
"cwe_ids": [
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-07-11T16:29:00Z",
"severity": "HIGH"
},
"details": "An exploitable out-of-bounds write exists in the Microsoft Word document conversion functionality of the Antenna House Office Server Document Converter version V6.1 Pro MR2 for Linux64 (6,1,2018,0312). A crafted Microsoft Word (DOC) document can lead to an out-of-bounds write, resulting in remote code execution. This vulnerability occurs in the `vbputanld` method.",
"id": "GHSA-w29r-974p-f67j",
"modified": "2022-05-13T01:01:55Z",
"published": "2022-05-13T01:01:55Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-3933"
},
{
"type": "WEB",
"url": "https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0600"
}
],
"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-W2C5-VJQ8-V8HC
Vulnerability from github – Published: 2026-06-25 15:32 – Updated: 2026-06-25 21:31In EmberZNet v9.0.2 and earlier, malformed IAS Zone enrollment messages can trigger an out-of-bounds state-table write and terminate the process. The size and location of this write is limited. These messages must come from a device that has already joined the network. Only devices supporting the IAS Zone cluster may be impacted.
{
"affected": [],
"aliases": [
"CVE-2026-47150"
],
"database_specific": {
"cwe_ids": [
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-06-25T14:16:41Z",
"severity": "HIGH"
},
"details": "In EmberZNet v9.0.2 and earlier, malformed IAS Zone enrollment messages can trigger an out-of-bounds state-table write and terminate the process. The size and location of this write is limited. These messages must come from a device that has already joined the network. Only devices supporting the IAS Zone cluster may be impacted.",
"id": "GHSA-w2c5-vjq8-v8hc",
"modified": "2026-06-25T21:31:28Z",
"published": "2026-06-25T15:32:00Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-47150"
},
{
"type": "WEB",
"url": "https://github.com/SiliconLabsSoftware/sisdk-release"
},
{
"type": "WEB",
"url": "https://siliconlabs.lightning.force.com/sfc/servlet.shepherd/document/download/069Vm00000pEGPQIA4?operationContext=S1"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/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-W2G4-5X4V-RVP3
Vulnerability from github – Published: 2023-09-28 15:30 – Updated: 2024-04-04 07:57D-Link DIR-619L B1 2.02 is vulnerable to Buffer Overflow via formSetWAN_Wizard55 function.
{
"affected": [],
"aliases": [
"CVE-2023-43864"
],
"database_specific": {
"cwe_ids": [
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-09-28T14:15:22Z",
"severity": "HIGH"
},
"details": "D-Link DIR-619L B1 2.02 is vulnerable to Buffer Overflow via formSetWAN_Wizard55 function.",
"id": "GHSA-w2g4-5x4v-rvp3",
"modified": "2024-04-04T07:57:17Z",
"published": "2023-09-28T15:30:17Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-43864"
},
{
"type": "WEB",
"url": "https://github.com/YTrick/vuln/blob/main/DIR-619L%20Buffer%20Overflow_1.md"
},
{
"type": "WEB",
"url": "https://www.dlink.com/en/security-bulletin"
}
],
"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-W2GX-JRW9-W3HF
Vulnerability from github – Published: 2025-04-28 21:30 – Updated: 2025-04-28 21:30A vulnerability was found in code-projects Train Ticket Reservation System 1.0. It has been declared as critical. Affected by this vulnerability is the function Reservation of the component Ticket Reservation. The manipulation of the argument Name leads to stack-based buffer overflow. Attacking locally is a requirement. The exploit has been disclosed to the public and may be used.
{
"affected": [],
"aliases": [
"CVE-2025-4038"
],
"database_specific": {
"cwe_ids": [
"CWE-119",
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-04-28T21:15:57Z",
"severity": "MODERATE"
},
"details": "A vulnerability was found in code-projects Train Ticket Reservation System 1.0. It has been declared as critical. Affected by this vulnerability is the function Reservation of the component Ticket Reservation. The manipulation of the argument Name leads to stack-based buffer overflow. Attacking locally is a requirement. The exploit has been disclosed to the public and may be used.",
"id": "GHSA-w2gx-jrw9-w3hf",
"modified": "2025-04-28T21:30:44Z",
"published": "2025-04-28T21:30:44Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-4038"
},
{
"type": "WEB",
"url": "https://code-projects.org"
},
{
"type": "WEB",
"url": "https://github.com/zzzxc643/cve/blob/main/Buffer%20Overflow%20Vulnerability%20in%20Train%20Reservation%20System.md"
},
{
"type": "WEB",
"url": "https://vuldb.com/?ctiid.306403"
},
{
"type": "WEB",
"url": "https://vuldb.com/?id.306403"
},
{
"type": "WEB",
"url": "https://vuldb.com/?submit.559344"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/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-W2GX-PFC5-RWP8
Vulnerability from github – Published: 2022-05-13 01:09 – Updated: 2022-05-13 01:09A stack-based buffer overflow (Remote Code Execution) issue was discovered in Design Science MathType 6.9c. This occurs in a function call in which the first argument is a corrupted offset value and the second argument is a stack buffer. This is fixed in 6.9d.
{
"affected": [],
"aliases": [
"CVE-2018-6638"
],
"database_specific": {
"cwe_ids": [
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-02-28T05:29:00Z",
"severity": "CRITICAL"
},
"details": "A stack-based buffer overflow (Remote Code Execution) issue was discovered in Design Science MathType 6.9c. This occurs in a function call in which the first argument is a corrupted offset value and the second argument is a stack buffer. This is fixed in 6.9d.",
"id": "GHSA-w2gx-pfc5-rwp8",
"modified": "2022-05-13T01:09:57Z",
"published": "2022-05-13T01:09:57Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-6638"
},
{
"type": "WEB",
"url": "https://drive.google.com/open?id=1V-AA1InXBPhgJviabilttkaP4DYay9f6"
},
{
"type": "WEB",
"url": "http://www.dessci.com/en/dl"
}
],
"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"
}
]
}
GHSA-W2HM-JJ7V-QVJX
Vulnerability from github – Published: 2024-11-08 06:30 – Updated: 2024-11-13 18:31In the Linux kernel, the following vulnerability has been resolved:
net: ethernet: mtk_eth_soc: fix memory corruption during fq dma init
The loop responsible for allocating up to MTK_FQ_DMA_LENGTH buffers must only touch as many descriptors, otherwise it ends up corrupting unrelated memory. Fix the loop iteration count accordingly.
{
"affected": [],
"aliases": [
"CVE-2024-50206"
],
"database_specific": {
"cwe_ids": [
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-11-08T06:15:16Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ethernet: mtk_eth_soc: fix memory corruption during fq dma init\n\nThe loop responsible for allocating up to MTK_FQ_DMA_LENGTH buffers must\nonly touch as many descriptors, otherwise it ends up corrupting unrelated\nmemory. Fix the loop iteration count accordingly.",
"id": "GHSA-w2hm-jj7v-qvjx",
"modified": "2024-11-13T18:31:53Z",
"published": "2024-11-08T06:30:49Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-50206"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/68cd084e3ec1512cd383cb3e9cf0ab7ab413724c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/88806efc034a9830f483963326b99930ad519af1"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-W2J5-7V7J-3J8R
Vulnerability from github – Published: 2022-05-24 17:39 – Updated: 2022-05-24 17:39Multiple vulnerabilities in the web-based management interface of Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers could allow an authenticated, remote attacker to execute arbitrary code or cause an affected device to restart unexpectedly. The vulnerabilities are due to improper validation of user-supplied input in the web-based management interface. An attacker could exploit these vulnerabilities by sending crafted HTTP requests to an affected device. A successful exploit could allow the attacker to execute arbitrary code as the root user on the underlying operating system or cause the device to reload, resulting in a denial of service (DoS) condition. To exploit these vulnerabilities, an attacker would need to have valid administrator credentials on the affected device. Cisco has not released software updates that address these vulnerabilities.
{
"affected": [],
"aliases": [
"CVE-2021-1172"
],
"database_specific": {
"cwe_ids": [
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-01-13T22:15:00Z",
"severity": "HIGH"
},
"details": "Multiple vulnerabilities in the web-based management interface of Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers could allow an authenticated, remote attacker to execute arbitrary code or cause an affected device to restart unexpectedly. The vulnerabilities are due to improper validation of user-supplied input in the web-based management interface. An attacker could exploit these vulnerabilities by sending crafted HTTP requests to an affected device. A successful exploit could allow the attacker to execute arbitrary code as the root user on the underlying operating system or cause the device to reload, resulting in a denial of service (DoS) condition. To exploit these vulnerabilities, an attacker would need to have valid administrator credentials on the affected device. Cisco has not released software updates that address these vulnerabilities.",
"id": "GHSA-w2j5-7v7j-3j8r",
"modified": "2022-05-24T17:39:05Z",
"published": "2022-05-24T17:39:05Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-1172"
},
{
"type": "WEB",
"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-rv-overflow-WUnUgv4U"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-W2PJ-9CGH-MQ2C
Vulnerability from github – Published: 2024-08-30 23:37 – Updated: 2024-08-30 23:37opencv-contrib-python-headless versions before v4.8.1.78 bundled libwebp binaries in wheels that are vulnerable to CVE-2023-4863. opencv-contrib-python-headless v4.8.1.78 upgrades the bundled libwebp binary to v1.3.2.
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "opencv-contrib-python-headless"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "4.8.1.78"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [],
"database_specific": {
"cwe_ids": [
"CWE-787"
],
"github_reviewed": true,
"github_reviewed_at": "2024-08-30T23:37:14Z",
"nvd_published_at": null,
"severity": "HIGH"
},
"details": "opencv-contrib-python-headless versions before v4.8.1.78 bundled libwebp binaries in wheels that are vulnerable to CVE-2023-4863. opencv-contrib-python-headless v4.8.1.78 upgrades the bundled libwebp binary to v1.3.2.",
"id": "GHSA-w2pj-9cgh-mq2c",
"modified": "2024-08-30T23:37:14Z",
"published": "2024-08-30T23:37:14Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-4863"
},
{
"type": "WEB",
"url": "https://github.com/opencv/opencv/pull/24274"
},
{
"type": "WEB",
"url": "https://github.com/opencv/opencv/commit/687fc11626901cff09d2b3b5f331fd59190ad4c7"
},
{
"type": "ADVISORY",
"url": "https://github.com/advisories/GHSA-j7hp-h8jx-5ppr"
},
{
"type": "PACKAGE",
"url": "https://github.com/opencv/opencv-python"
},
{
"type": "WEB",
"url": "https://github.com/opencv/opencv/wiki/ChangeLog#version481"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/opencv-contrib-python-headless/PYSEC-2023-182.yaml"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "opencv-contrib-python-headless bundled libwebp binaries in wheels that are vulnerable to CVE-2023-4863"
}
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.