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
17015 vulnerabilities reference this CWE, most recent first.
GHSA-PW3J-7FMH-8VPR
Vulnerability from github – Published: 2022-01-19 00:01 – Updated: 2022-01-26 00:03There is a Out-of-Bound Write in the Allwinner R818 SoC Android Q SDK V1.0 camera driver "/dev/cedar_dev" through iotcl cmd IOCTL_SET_PROC_INFO and IOCTL_COPY_PROC_INFO, which could cause a system crash or EoP.
{
"affected": [],
"aliases": [
"CVE-2021-38783"
],
"database_specific": {
"cwe_ids": [
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-01-18T13:15:00Z",
"severity": "HIGH"
},
"details": "There is a Out-of-Bound Write in the Allwinner R818 SoC Android Q SDK V1.0 camera driver \"/dev/cedar_dev\" through iotcl cmd IOCTL_SET_PROC_INFO and IOCTL_COPY_PROC_INFO, which could cause a system crash or EoP.",
"id": "GHSA-pw3j-7fmh-8vpr",
"modified": "2022-01-26T00:03:33Z",
"published": "2022-01-19T00:01:23Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-38783"
},
{
"type": "WEB",
"url": "https://github.com/pokerfacett/MY_CVE_CREDIT/blob/master/Allwinner%20R818%20SoC%EF%BC%9ACamera%20Driver%20has%20Out-Of-Bound%20Write%20Vulnerability.md"
},
{
"type": "WEB",
"url": "https://vul.wangan.com/a/CNVD-2021-49168"
},
{
"type": "WEB",
"url": "https://www.allwinnertech.com/index.php?c=product\u0026a=index\u0026id=92"
},
{
"type": "WEB",
"url": "https://www.cnvd.org.cn/flaw/show/CNVD-2021-49168"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-PW3W-WHQ9-H2WW
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-2021-1163"
],
"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-pw3w-whq9-h2ww",
"modified": "2022-05-24T17:39:04Z",
"published": "2022-05-24T17:39:04Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-1163"
},
{
"type": "WEB",
"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-rv-overflow-WUnUgv4U"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-PW46-4VMG-5HRG
Vulnerability from github – Published: 2023-11-23 06:30 – Updated: 2023-11-30 03:30A maliciously crafted PRT file when parsed through Autodesk AutoCAD 2024 and 2023 can be used to cause an Out-Of-Bounds Write. A malicious actor can leverage this vulnerability to cause a crash, read sensitive data, or execute arbitrary code in the context of the current process.
{
"affected": [],
"aliases": [
"CVE-2023-29075"
],
"database_specific": {
"cwe_ids": [
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-11-23T04:15:07Z",
"severity": "CRITICAL"
},
"details": "A maliciously crafted PRT file when parsed through Autodesk AutoCAD 2024 and 2023 can be used to cause an Out-Of-Bounds Write. A malicious actor can leverage this vulnerability to cause a crash, read sensitive data, or execute arbitrary code in the context of the current process.\n",
"id": "GHSA-pw46-4vmg-5hrg",
"modified": "2023-11-30T03:30:30Z",
"published": "2023-11-23T06:30:29Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-29075"
},
{
"type": "WEB",
"url": "https://www.autodesk.com/trust/security-advisories/adsk-sa-2023-0018"
}
],
"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-PW46-7QRX-4MC7
Vulnerability from github – Published: 2025-03-03 18:31 – Updated: 2025-03-03 18:31A vulnerability, which was classified as critical, has been found in D-Link DAP-1562 1.10. Affected by this issue is the function http_request_parse of the component HTTP Header Handler. The manipulation of the argument Authorization leads to stack-based buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. This vulnerability only affects products that are no longer supported by the maintainer.
{
"affected": [],
"aliases": [
"CVE-2025-1876"
],
"database_specific": {
"cwe_ids": [
"CWE-119",
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-03-03T17:15:14Z",
"severity": "MODERATE"
},
"details": "A vulnerability, which was classified as critical, has been found in D-Link DAP-1562 1.10. Affected by this issue is the function http_request_parse of the component HTTP Header Handler. The manipulation of the argument Authorization leads to stack-based buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. This vulnerability only affects products that are no longer supported by the maintainer.",
"id": "GHSA-pw46-7qrx-4mc7",
"modified": "2025-03-03T18:31:29Z",
"published": "2025-03-03T18:31:29Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-1876"
},
{
"type": "WEB",
"url": "https://vuldb.com/?ctiid.298190"
},
{
"type": "WEB",
"url": "https://vuldb.com/?id.298190"
},
{
"type": "WEB",
"url": "https://vuldb.com/?submit.506106"
},
{
"type": "WEB",
"url": "https://witty-maiasaura-083.notion.site/D-link-DAP-1562-http_request_parse-Vulnerability-1a4b2f2a636180a2a67de271ad5fe6d7"
},
{
"type": "WEB",
"url": "https://www.dlink.com"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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-PW49-CJR4-3PQR
Vulnerability from github – Published: 2022-07-19 00:00 – Updated: 2022-07-28 00:00HTMLDoc v1.9.12 and below was discovered to contain a heap overflow via e_node htmldoc/htmldoc/html.cxx:588.
{
"affected": [],
"aliases": [
"CVE-2022-34035"
],
"database_specific": {
"cwe_ids": [
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-07-18T21:15:00Z",
"severity": "HIGH"
},
"details": "HTMLDoc v1.9.12 and below was discovered to contain a heap overflow via e_node htmldoc/htmldoc/html.cxx:588.",
"id": "GHSA-pw49-cjr4-3pqr",
"modified": "2022-07-28T00:00:43Z",
"published": "2022-07-19T00:00:23Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-34035"
},
{
"type": "WEB",
"url": "https://github.com/michaelrsweet/htmldoc/issues/426"
},
{
"type": "WEB",
"url": "https://github.com/michaelrsweet/htmldoc/commit/a0014be47d614220db111b360fb6170ef6f3937e"
},
{
"type": "WEB",
"url": "https://github.com/michaelrsweet/htmldoc/commit/ee778252faebb721afba5a081dd6ad7eaf20eef3"
}
],
"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-PW59-9RV7-8JCX
Vulnerability from github – Published: 2022-09-20 00:00 – Updated: 2022-09-23 00:00OTFCC commit 617837b was discovered to contain a heap buffer overflow via /release-x64/otfccdump+0x6e41a8.
{
"affected": [],
"aliases": [
"CVE-2022-35063"
],
"database_specific": {
"cwe_ids": [
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-09-19T22:15:00Z",
"severity": "MODERATE"
},
"details": "OTFCC commit 617837b was discovered to contain a heap buffer overflow via /release-x64/otfccdump+0x6e41a8.",
"id": "GHSA-pw59-9rv7-8jcx",
"modified": "2022-09-23T00:00:44Z",
"published": "2022-09-20T00:00:21Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-35063"
},
{
"type": "WEB",
"url": "https://drive.google.com/file/d/1VW_6SXTGWABHMqW6m-hpfpbedaJFFG5b/view?usp=sharing"
},
{
"type": "WEB",
"url": "https://github.com/Cvjark/Poc/blob/main/otfcc/CVE-2022-35063.md"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-PW59-XGG6-XJQH
Vulnerability from github – Published: 2022-01-15 00:01 – Updated: 2022-01-21 00:00In mgm_alloc_page of memory_group_manager.c, there is a possible out of bounds write due to an incorrect bounds check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-201677538References: N/A
{
"affected": [],
"aliases": [
"CVE-2021-39682"
],
"database_specific": {
"cwe_ids": [
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-01-14T20:15:00Z",
"severity": "HIGH"
},
"details": "In mgm_alloc_page of memory_group_manager.c, there is a possible out of bounds write due to an incorrect bounds check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-201677538References: N/A",
"id": "GHSA-pw59-xgg6-xjqh",
"modified": "2022-01-21T00:00:55Z",
"published": "2022-01-15T00:01:19Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-39682"
},
{
"type": "WEB",
"url": "https://source.android.com/security/bulletin/pixel/2022-01-01"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-PW5C-WQWH-87WP
Vulnerability from github – Published: 2026-11-10 03:30 – Updated: 2026-11-10 03:30An out-of-bounds write in certain ASUS Router firmware allows an unauthenticated nearby user to send an HTTP request containing parameters that exceed the buffer length, potentially overwriting other memory regions or causing the system to crash. Refer to the ' Security Update for ASUS Router Firmware ' section on the ASUS Security Advisory for more information.
{
"affected": [],
"aliases": [
"CVE-2026-88707"
],
"database_specific": {
"cwe_ids": [
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-11-10T02:16:45Z",
"severity": "HIGH"
},
"details": "An\nout-of-bounds write in certain ASUS Router firmware\nallows an unauthenticated nearby user to send an HTTP request containing\nparameters that exceed the buffer length, potentially overwriting other memory\nregions or causing the system to crash.\nRefer to the \u0027 Security Update for ASUS Router Firmware\u00a0\u0027 section on the ASUS Security Advisory for more information.",
"id": "GHSA-pw5c-wqwh-87wp",
"modified": "2026-11-10T03:30:34Z",
"published": "2026-11-10T03:30:34Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-88707"
},
{
"type": "WEB",
"url": "https://www.asus.com/security-advisory"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/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-PW5Q-WQ5P-C427
Vulnerability from github – Published: 2022-05-24 16:58 – Updated: 2024-04-04 02:10IrfanView 4.53 allows Data from a Faulting Address to control a subsequent Write Address starting at FORMATS!Read_BadPNG+0x0000000000000101.
{
"affected": [],
"aliases": [
"CVE-2019-17254"
],
"database_specific": {
"cwe_ids": [
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2019-10-08T12:15:00Z",
"severity": "HIGH"
},
"details": "IrfanView 4.53 allows Data from a Faulting Address to control a subsequent Write Address starting at FORMATS!Read_BadPNG+0x0000000000000101.",
"id": "GHSA-pw5q-wq5p-c427",
"modified": "2024-04-04T02:10:29Z",
"published": "2022-05-24T16:58:04Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-17254"
},
{
"type": "WEB",
"url": "https://github.com/linhlhq/research/blob/master/README.md"
},
{
"type": "WEB",
"url": "https://www.irfanview.com/main_history.htm"
}
],
"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"
}
]
}
GHSA-PW65-258F-V77H
Vulnerability from github – Published: 2024-03-08 03:31 – Updated: 2026-04-02 21:31A memory corruption vulnerability was addressed with improved locking. This issue is fixed in macOS Monterey 12.7.4, macOS Ventura 13.6.5, macOS Sonoma 14.4, visionOS 1.1, iOS 17.4 and iPadOS 17.4, watchOS 10.4, iOS 16.7.6 and iPadOS 16.7.6, tvOS 17.4. An app may be able to cause unexpected system termination or write kernel memory.
{
"affected": [],
"aliases": [
"CVE-2024-23265"
],
"database_specific": {
"cwe_ids": [
"CWE-400",
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-03-08T02:15:49Z",
"severity": "CRITICAL"
},
"details": "A memory corruption vulnerability was addressed with improved locking. This issue is fixed in macOS Monterey 12.7.4, macOS Ventura 13.6.5, macOS Sonoma 14.4, visionOS 1.1, iOS 17.4 and iPadOS 17.4, watchOS 10.4, iOS 16.7.6 and iPadOS 16.7.6, tvOS 17.4. An app may be able to cause unexpected system termination or write kernel memory.",
"id": "GHSA-pw65-258f-v77h",
"modified": "2026-04-02T21:31:38Z",
"published": "2024-03-08T03:31:25Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-23265"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/120880"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/120881"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/120882"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/120883"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/120884"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/120886"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/120893"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/120895"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/HT214081"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/HT214082"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/HT214083"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/HT214084"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/HT214085"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/HT214086"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/HT214087"
},
{
"type": "WEB",
"url": "https://support.apple.com/en-us/HT214088"
},
{
"type": "WEB",
"url": "https://support.apple.com/kb/HT214081"
},
{
"type": "WEB",
"url": "https://support.apple.com/kb/HT214082"
},
{
"type": "WEB",
"url": "https://support.apple.com/kb/HT214083"
},
{
"type": "WEB",
"url": "https://support.apple.com/kb/HT214084"
},
{
"type": "WEB",
"url": "https://support.apple.com/kb/HT214085"
},
{
"type": "WEB",
"url": "https://support.apple.com/kb/HT214087"
},
{
"type": "WEB",
"url": "https://support.apple.com/kb/HT214088"
},
{
"type": "WEB",
"url": "http://seclists.org/fulldisclosure/2024/Mar/21"
},
{
"type": "WEB",
"url": "http://seclists.org/fulldisclosure/2024/Mar/22"
},
{
"type": "WEB",
"url": "http://seclists.org/fulldisclosure/2024/Mar/23"
},
{
"type": "WEB",
"url": "http://seclists.org/fulldisclosure/2024/Mar/24"
},
{
"type": "WEB",
"url": "http://seclists.org/fulldisclosure/2024/Mar/25"
},
{
"type": "WEB",
"url": "http://seclists.org/fulldisclosure/2024/Mar/26"
}
],
"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"
}
]
}
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.