Weakness (CWE)
CWE-787: Out-of-bounds Write
The product writes data past the end, or before the beginning, of the intended buffer.
How to prevent it (7 mitigations)
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Requirements
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.
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Architecture and Design
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.
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Operation, Build and Compilation
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.
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Implementation
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.
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Operation, Build and Compilation
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].
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Operation
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].
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Implementation
Replace unbounded copy functions with analogous functions that support length arguments, such as strcpy with strncpy. Create these if they are not available.
Source: MITRE CWE-787
3,640 results · Clear filters · Feed
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High 7.8
Out-of-bound write vulnerability exists in Screen Creator Advance 2 Ver.0.1.1.4 Build01 and earlier due to lack of erro…
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High 7.2
Tenda AC23 httpd formGetSysToolDDNS out-of-bounds write
A vulnerability was found in Tenda AC23 16.03.07.45 and classified as critical. Affected by this issue is the function formSetSysToolDDNS/formGetSysToolDDNS of the file /bin/httpd. The manipulation leads to out-of-bounds write. The attack may be launched remo…
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High 8.8
D-Link N300 WI-FI Router DIR-605L v2.13B01 was discovered to contain a stack overflow via the webpage parameter at /gof…
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High 8.8
D-Link N300 WI-FI Router DIR-605L v2.13B01 was discovered to contain a stack overflow via the webpage parameter at /gof…
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High 8.8
D-Link N300 WI-FI Router DIR-605L v2.13B01 was discovered to contain a stack overflow via the curTime parameter at /gof…
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High 8.8
D-Link N300 WI-FI Router DIR-605L v2.13B01 was discovered to contain a stack overflow via the wan_connected parameter a…
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High 8.8
D-Link N300 WI-FI Router DIR-605L v2.13B01 was discovered to contain a stack overflow via the curTime parameter at /gof…
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High 7.8
CVE-2023-0249
Delta Electronics DIAScreen versions 1.2.1.23 and prior are vulnerable to out-of-bounds write, which may allow an attacker to remotely execute arbitrary code.
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High 7.8
Buffer overflow vulnerability in function json_parse_value in sheredom json.h before commit 0825301a07cbf51653882bf2b15…
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High 8.8
Buffer overflow vulnerability in function json_parse_string in sheredom json.h before commit 0825301a07cbf51653882bf2b1…
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High 7.5
Buffer Overflow vulnerability in pdfimages in xpdf 4.03 allows attackers to crash the application via crafted command.
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High 7.5
Buffer Overflow vulnerability in HDFGroup hdf5-h5dump 1.12.0 through 1.13.0 allows attackers to cause a denial of servi…
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High 7.8
CVE-2023-0124
Delta Electronics DOPSoft versions 4.00.16.22 and prior are vulnerable to an out-of-bounds write, which could allow an attacker to remotely execute arbitrary code when a malformed file is introduced to the software.
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High 8.2
Cypress : https://www.infineon.com/ Cypress Bluetooth Mesh SDK BSA0107_05.01.00-BX8-AMESH-08 is affected by: Buffer Ove…
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High 8.2
Cypress : https://www.infineon.com/ Cypress Bluetooth Mesh SDK BSA0107_05.01.00-BX8-AMESH-08 is affected by: Buffer Ove…
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High 8.2
In Bestechnic Bluetooth Mesh SDK (BES2300) V1.0, a buffer overflow vulnerability can be triggered during provisioning, …
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High 7.8
Buffer overflow vulnerability in function json_parse_object in sheredom json.h before commit 0825301a07cbf51653882bf2b1…
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High 7.8
Netgear routers R7000P before v1.3.3.154, R6900P before v1.3.3.154, R7960P before v1.4.4.94, and R8000P before v1.4.4.9…
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High 7.8
ZDI-CAN-19515: Adobe Acrobat Reader DC AcroForm Annotation Out-Of-Bounds Write Remote Code Execution Vulnerability
Adobe Acrobat Reader versions 22.003.20282 (and earlier), 22.003.20281 (and earlier) and 20.005.30418 (and earlier) are affected by an out-of-bounds write vulnerability that could result in arbitrary code execution in the context of the current user. Exploita…
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High 7.8
ZDI-CAN-19517: Adobe Acrobat Reader DC AcroForm Annotation Out-Of-Bounds Write Remote Code Execution Vulnerability
Adobe Acrobat Reader versions 22.003.20282 (and earlier), 22.003.20281 (and earlier) and 20.005.30418 (and earlier) are affected by an out-of-bounds write vulnerability that could result in arbitrary code execution in the context of the current user. Exploita…
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High 7.8
ZDI-CAN-19516: Adobe Acrobat Reader DC AcroForm Annotation Out-Of-Bounds Write Remote Code Execution Vulnerability
Adobe Acrobat Reader versions 22.003.20282 (and earlier), 22.003.20281 (and earlier) and 20.005.30418 (and earlier) are affected by an out-of-bounds write vulnerability that could result in arbitrary code execution in the context of the current user. Exploita…
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High 7.8
This vulnerability allows remote attackers to execute arbitrary code on affected installations of PDF-XChange Editor. U…
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High 7.8
This vulnerability allows remote attackers to execute arbitrary code on affected installations of PDF-XChange Editor. U…
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High 7.8
This vulnerability allows remote attackers to execute arbitrary code on affected installations of PDF-XChange Editor. U…
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High 7.8
This vulnerability allows remote attackers to execute arbitrary code on affected installations of PDF-XChange Editor. U…
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High 7.8
This vulnerability allows remote attackers to execute arbitrary code on affected installations of PDF-XChange Editor. U…
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High 7.8
This vulnerability allows remote attackers to execute arbitrary code on affected installations of PDF-XChange Editor. U…
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High 7.8
This vulnerability allows remote attackers to execute arbitrary code on affected installations of PDF-XChange Editor. U…
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High 7.8
This vulnerability allows remote attackers to execute arbitrary code on affected installations of PDF-XChange Editor. U…
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High 7.8
This vulnerability allows remote attackers to execute arbitrary code on affected installations of PDF-XChange Editor. U…
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High 7.8
This vulnerability allows remote attackers to execute arbitrary code on affected installations of PDF-XChange Editor. U…
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High 7.8
This vulnerability allows remote attackers to execute arbitrary code on affected installations of PDF-XChange Editor. U…
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High 7.8
This vulnerability allows remote attackers to execute arbitrary code on affected installations of PDF-XChange Editor. U…
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High 7.8
This vulnerability allows remote attackers to execute arbitrary code on affected installations of PDF-XChange Editor. U…
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High 7.8
This vulnerability allows remote attackers to execute arbitrary code on affected installations of PDF-XChange Editor. U…
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High 7.8
This vulnerability allows remote attackers to execute arbitrary code on affected installations of PDF-XChange Editor. U…
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High 7.8
This vulnerability allows remote attackers to execute arbitrary code on affected installations of PDF-XChange Editor. U…
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High 7.8
This vulnerability allows remote attackers to execute arbitrary code on affected installations of PDF-XChange Editor. U…
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High 7.8
This vulnerability allows remote attackers to execute arbitrary code on affected installations of PDF-XChange Editor. U…
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High 7.8
This vulnerability allows remote attackers to execute arbitrary code on affected installations of PDF-XChange Editor. U…