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
1,418 results · Clear filters · Feed
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Medium 5.5
In FM service , there is a possible missing params check. This could lead to local denial of service in FM service .
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Medium 5.5
In FM service , there is a possible missing params check. This could lead to local denial of service in FM service .
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Medium 5.5
Buffer Overflow vulnerability found in Libtiff V.4.0.7 allows a local attacker to cause a denial of service via the tif…
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Medium 5.5
Buffer Overflow vulnerability found in Cesanta MJS v.1.26 allows a local attacker to cause a denial of service via the …
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Medium 6.7
The issue was addressed with improved memory handling. This issue is fixed in macOS Ventura 13.3, iOS 16.4 and iPadOS 1…
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Medium 6.7
Out-of-bounds Write vulnerability while processing BC_TUI_CMD_UPDATE_SCREEN in bc_tui trustlet from Samsung Blockchain …
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Medium 6.7
Out-of-bounds Write vulnerability while processing BC_TUI_CMD_SEND_RESOURCE_DATA command in bc_tui trustlet from Samsun…
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Medium 6.7
Out-of-bounds Write vulnerability while processing BC_TUI_CMD_SEND_RESOURCE_DATA_ARRAY command in bc_tui trustlet from …
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Medium 5.5
swfrender v0.9.2 was discovered to contain a heap buffer overflow in the function enumerateUsedIDs_fillstyle at modules…
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Medium 5.5
Jerryscript commit 1a2c047 was discovered to contain a stack overflow via the component vm_loop at /jerry-core/vm/vm.c.
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Medium 5.5
Jerryscript commit 1a2c047 was discovered to contain a stack overflow via the component ecma_op_function_construct at /…
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Medium 6.1
NVIDIA GPU Display Driver for Windows and Linux contains a vulnerability in the kernel mode layer handler, where an out…
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Medium 4.9
H3C Magic R200 version R200V100R004 was discovered to contain a stack overflow via the UpdateMacClone interface at /gof…
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Medium 4.9
H3C Magic R200 version R200V100R004 was discovered to contain a stack overflow via the SetMobileAPInfoById interface at…
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Medium 4.9
H3C Magic R200 version R200V100R004 was discovered to contain a stack overflow via the AddMacList interface at /goform/…
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Medium 4.9
H3C Magic R200 version R200V100R004 was discovered to contain a stack overflow via the Edit_BasicSSID interface at /gof…
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Medium 4.9
H3C Magic R200 version R200V100R004 was discovered to contain a stack overflow via the Edit_BasicSSID_5G interface at /…
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Medium 4.9
H3C Magic R200 version R200V100R004 was discovered to contain a stack overflow via the UpdateWanParams interface at /go…
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Medium 4.9
H3C Magic R200 R200V100R004 was discovered to contain a stack overflow via the DelvsList interface at /goform/aspForm.
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Medium 4.9
H3C Magic R200 version R200V100R004 was discovered to contain a stack overflow via the SetAPWifiorLedInfoById interface…
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Medium 4.9
H3C Magic R200 version R200V100R004 was discovered to contain a stack overflow via the DeltriggerList interface at /gof…
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Medium 4.9
H3C Magic R200 version R200V100R004 was discovered to contain a stack overflow via the UpdateSnat interface at /goform/…
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Medium 4.9
H3C Magic R200 version R200V100R004 was discovered to contain a stack overflow via the AddWlanMacList interface at /gof…
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Medium 4.9
H3C Magic R200 version R200V100R004 was discovered to contain a stack overflow via go parameter at /goform/aspForm.
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Medium 4.9
H3C Magic R200 version R200V100R004 was discovered to contain a stack overflow via CMD parameter at /goform/aspForm.
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Medium 6.7
An out-of-bounds write vulnerability was found in the Linux kernel's SLIMpro I2C device driver. The userspace "data->bl…
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Medium 6.6
In acc_ctrlrequest_composite of f_accessory.c, there is a possible out of bounds write due to a missing bounds check. T…
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Medium 6.8
An issue was discovered in Samsung Exynos Mobile Processor, Automotive Processor and Modem for Exynos Modem 5123, Exyno…
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Medium 6.8
An issue was discovered in Samsung Exynos Mobile Processor, Automotive Processor and Modem for Exynos Modem 5123, Exyno…
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Medium 6.8
An issue was discovered in Samsung Exynos Mobile Processor, Automotive Processor and Modem for Exynos Modem 5123, Exyno…
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Medium 6.8
An issue was discovered in Samsung Exynos Mobile Processor, Automotive Processor and Modem for Exynos Modem 5123, Exyno…
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Medium 6.8
An issue was discovered in Samsung Exynos Mobile Processor, Automotive Processor and Modem for Exynos Modem 5123, Exyno…
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Medium 5.5
A heap-based buffer overflow issue was discovered in ImageMagick's ImportMultiSpectralQuantum() function in MagickCore/…
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Medium 5.5
In media service, there is a missing permission check. This could lead to local denial of service in media service.
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Medium 6.4
praecis_parse in ntpd/refclock_palisade.c in NTP 4.2.8p15 has an out-of-bounds write. Any attack method would be comple…
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Medium 5.6
mstolfp in libntp/mstolfp.c in NTP 4.2.8p15 has an out-of-bounds write in the cp<cpdec while loop. An adversary may be …
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Medium 5.6
mstolfp in libntp/mstolfp.c in NTP 4.2.8p15 has an out-of-bounds write when adding a '\0' character. An adversary may b…
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Medium 5.6
mstolfp in libntp/mstolfp.c in NTP 4.2.8p15 has an out-of-bounds write when adding a decimal point. An adversary may be…
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Medium 5.6
mstolfp in libntp/mstolfp.c in NTP 4.2.8p15 has an out-of-bounds write when copying the trailing number. An adversary m…
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Medium 4.9
H3C Magic R100 R100V100R005.bin was discovered to contain a stack overflow via the DeltriggerList interface at /goform/…