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
6,159 results · Feed
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Medium 5.9
Security Advisory 0180
The VeloCloud Edge and Gateway exhibit an out-of-bounds write vulnerability when processing tunneled IP fragments between authenticated overlay neighbors. This vulnerability impacts the VeloCloud VCMP tunnel protocol only. A successful exploit can cause the a…
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High 8.8
Out of bounds write in ServiceWorker in Google Chrome prior to 153.0.8010.47 allowed a remote attacker to execute arbit…
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Medium 6.7
In link_load_gnss_image of link_device.c, there is a possible out-of-bounds write due to a missing bounds check. This c…
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High 7.0
In google_mba_recv_msg of google_mba_poll.c, there is a possible out-of-bounds write due to a race condition. This coul…
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High 7.0
In trusty_dputc of generic-arm64-smcall.c, there is a possible out-of-bounds write due to a race condition. This could …
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High 8.8
In IP Multimedia Subsystem, there is a possible out-of-bounds write due to improper input validation. This could lead t…
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Medium 6.7
In multiple locations, there is a possible out-of-bounds write due to a missing bounds check. This could lead to local …
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High 7.8
In phNxpNciHal_ext_process_nfc_init_rsp of phNxpNciHal_ext.cc, there is a possible out-of-bounds write due to a missing…
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High 8.8
In Av1DecodeFrameTag of vp9hwd_headers.cc, there is a possible out-of-bounds write due to a missing bounds check. This …
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Medium 6.7
In multiple locations, there is a possible out-of-bounds write due to a missing bounds check. This could lead to local …
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High 8.8
In Start of AudioRtpPayloadEncoderNode.cpp, there is a possible out-of-bounds write due to improper input validation. T…
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Medium 6.7
In multiple locations, there is a possible out-of-bounds write due to an incorrect bounds check. This could lead to loc…
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High 7.8
In VPU, there is a possible out-of-bounds write due to a confused deputy. This could lead to local escalation of privil…
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High 8.8
In ReadTileInfo of vp9hwd_headers.cc, there is a possible out-of-bounds write due to a missing bounds check. This could…
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High 8.8
In s_decode_vui_param of fw_hevc_dec_header.c, there is a possible out-of-bounds write due to a logic error in the code…
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Medium 6.7
In multiple functions of remap.c, there is a possible out-of-bounds write due to an incorrect bounds check. This could …
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High 7.8
In VPU, there is a possible out-of-bounds write due to an integer overflow. This could lead to local escalation of priv…
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Medium 6.7
In multiple locations, there is a possible out-of-bounds write due to improper input validation. This could lead to loc…
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High 7.8
In gf_base_update_finger_base of gf_base.c, there is a possible out-of-bounds write due to a heap buffer overflow. This…
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Medium 6.7
In printf of printf.c, there is a possible out-of-bounds write due to improper input validation. This could lead to loc…
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High 8.4
In Wave6VpuDecFlush of wave6.c, there is a possible out-of-bounds write due to a missing bounds check. This could lead …
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High 8.8
In Cellular Modem, there is a possible out-of-bounds write due to a heap buffer overflow. This could lead to remote esc…
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High 7.8
In gf_ta_test_set_config of gf_ta_test.c, there is a possible out-of-bounds write due to improper input validation. Thi…
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High 8.8
In multiple locations, there is a possible out-of-bounds write due to a logic error in the code. This could lead to rem…
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High 8.8
In Vp9DecodeFrameTag of vp9hwd_headers.cc, there is a possible out-of-bounds write due to a missing bounds check. This …
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High 8.8
In Cellular Modem, there is a possible out-of-bounds write due to a missing bounds check. This could lead to remote cod…
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High 7.8
pdfforge PDF Architect PDF File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability
pdfforge PDF Architect PDF File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of pdfforge PDF Architect. User interaction is required to exploit …
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High 7.8
pdfforge PDF Architect PDF File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability
pdfforge PDF Architect PDF File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of pdfforge PDF Architect. User interaction is required to exploit …
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High 7.8
OriginLab Origin Viewer OGWU File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability
OriginLab Origin Viewer OGWU File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of OriginLab Origin Viewer. User interaction is required to explo…
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Critical 9.8
libwebsockets HTTP/2 HPACK Path Header Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability
libwebsockets HTTP/2 HPACK Path Header Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of libwebsockets. Authentication is not required to exploit …
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High 8.1
IBM MQ .NET client is vulnerable to remote code execution
IBM MQ 9.1.0.0 through 9.1.0.37 LTS, 9.2.0.0 through 9.2.0.43 LTS, 9.3.0.0 through 9.3.0.41 LTS, 9.3.0.0 through 9.3.5.1 CD, 9.4.0.0 through 9.4.0.25 LTS, 9.4.0.0 through 9.4.5.1 CD, and 10.0.0.0 could allow a remote attacker to cause a denial of service or p…
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Critical 9.8
Security vulnerabilities have been addressed in IBM Verify Identity Access and IBM Security Verify Access
IBM Verify Identity Access is vulnerable to a buffer overflow attack.
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Medium 6.8
Out-of-bounds write in it51xxx I2C target FIFO ISR on oversized write transaction
The ITE it51xxx I2C driver, when operating as an I2C target (slave) in buffer mode (CONFIG_I2C_TARGET + CONFIG_I2C_TARGET_BUFFER_MODE), copies host-supplied write data into the fixed-size data->target_in_buffer inside its target FIFO interrupt handler target_…
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Medium 5.2
IBM i is Affected By Multiple Vulnerabilities in PASE [, ]
IBM i 7.6, 7.5, 7.4, and 7.3 could allow a denial of service as a result of a buffer overflow in a PASE process. An authenticated attacker could leverage this to terminate their own process.
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Medium 5.2
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 26.7 and iPadOS 26…
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High 7.8
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 27 and iPadOS 27, …
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Medium 6.5
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.7.8, …
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High 7.3
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 26.7 and iPadOS 26…
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High 7.8
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in macOS Golden Gate 27, …
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Medium 6.5
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 26.7 and iPadOS 26…