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
6,183 results · Feed
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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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High 8.2
Out-of-bounds write vulnerability in TA_Communication_mpos_encrypt_pin in mPOS TUI trustlet prior to SMR May-2023 Relea…
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High 7.1
A out-of-bounds write vulnerability in Fortinet FortiOS 7.2.0 through 7.2.3, FortiOS 7.0.0 through 7.0.10, FortiOS 6.4.…
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Critical 9.8
Certain HP LaserJet Pro print products are potentially vulnerable to Heap Overflow and/or Remote Code Execution.
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Critical 9.8
SmartDNS through 41 before 56d0332 allows an out-of-bounds write because of a stack-based buffer overflow in the _dns_e…
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High 7.8
qfq_change_class in net/sched/sch_qfq.c in the Linux kernel before 6.2.13 allows an out-of-bounds write because lmax ca…
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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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High 8.8CVE-2023-20872 Public exploit
VMware Workstation and Fusion contain an out-of-bounds read/write vulnerability in SCSI CD/DVD device emulation.
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High 8.2
VMware Workstation (17.x) and VMware Fusion (13.x) contain a stack-based buffer-overflow vulnerability that exists in t…
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Critical 9.8
RIOT-OS vulnerable to Packet Type Confusion during IPHC send
RIOT-OS, an operating system that supports Internet of Things devices, contains a network stack with the ability to process 6LoWPAN frames. Prior to version 2022.10, an attacker can send a crafted frame to the device resulting in a type confusion between IPv6…
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High 7.5
RIOT-OS vulnerable to Integer Underflow during defragmentation
RIOT-OS, an operating system that supports Internet of Things devices, contains a network stack with the ability to process 6LoWPAN frames. Prior to version 2022.10, an attacker can send a crafted frame to the device resulting in a large out of bounds write b…
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High 7.5
RIOT-OS vulnerable to Integer Underflow during IPHC receive
RIOT-OS, an operating system that supports Internet of Things devices, contains a network stack with the ability to process 6LoWPAN frames. An attacker can send a crafted frame to the device resulting in a large out of bounds write beyond the packet buffer. T…
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Critical 9.8
RIOT-OS vulnerable to Buffer Overflow during IPHC receive
RIOT-OS, an operating system that supports Internet of Things devices, contains a network stack with the ability to process 6LoWPAN frames. Prior to version 2022.10, an attacker can send a crafted frame to the device resulting in an out of bounds write in the…
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High 8.8
mp4v2 v2.0.0 was discovered to contain a heap buffer overflow via the mp4v2::impl::MP4StringProperty::~MP4StringPropert…
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Critical 9.8
Tenda AC15 V15.03.05.19 is vulnerable to Buffer Overflow.
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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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Critical 9.8
In Tenda AC15 V15.03.05.19, The function "xkjs_ver32" contains a stack-based buffer overflow vulnerability.
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Critical 9.8
Tenda AC5 V15.03.06.28 is vulnerable to Buffer Overflow via the initWebs function.
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Critical 9.8
In Tenda AC15 V15.03.05.19, the function "sub_ED14" contains a stack-based buffer overflow vulnerability.
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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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Critical 9.8
In Tenda AC15 V15.03.05.19, the function "henan_pppoe_user" contains a stack-based buffer overflow vulnerability.
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Critical 9.8
In Tenda AC15 V15.03.05.19, the function "sub_8EE8" contains a stack-based buffer overflow vulnerability.
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Critical 9.8
In Tenda AC15 V15.03.05.19, the function "xian_pppoe_user" contains a stack-based buffer overflow vulnerability.
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Critical 9.8
In Tenda AC15 V15.03.05.19, the function "getIfIp" contains a stack-based buffer overflow vulnerability.
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Critical 9.8
In Tenda AC15 V15.03.05.19, the function GetValue contains a stack-based buffer overflow vulnerability.
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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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High 7.8
Datakit CrossCAD/Ware
Datakit CrossCadWare_x64.dll contains an out-of-bounds write past the end of an allocated buffer while parsing a specially crafted SLDPRT file. This could allow an attacker to execute code in the context of the current process.