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 7.5
pbjson vulnerable to stack exhaustion
An issue was discovered pbjson thru 0.4.0 allows attackers to cause a denial of service or other unspecified impacts via crafted object that uses cyclic dependencies.
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High 7.5
JSONUtil vulnerable to stack exhaustion
An issue was discovered JSONUtil thru 5.0 allows attackers to cause a denial of service or other unspecified impacts via crafted object that uses cyclic dependencies.
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High 7.5
hjson stack exhaustion vulnerability
An issue was discovered hjson thru 3.0.0 allows attackers to cause a denial of service or other unspecified impacts via crafted object that uses cyclic dependencies.
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High 7.5
jjson vulnerable to stack exhaustion
An issue was discovered jjson thru 0.1.7 allows attackers to cause a denial of service or other unspecified impacts via crafted object that uses cyclic dependencies.
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High 7.8
Stack-based buffer overflow vulnerability exists in FRENIC RHC Loader v1.1.0.3. If a user opens a specially crafted FNE…
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High 7.5
Asus RT-N10LX Router v2.0.0.39 was discovered to contain a stack overflow via the url parameter at /start-apply.html. N…
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High 8.8
TP-Link EC-70 devices through 2.3.4 Build 20220902 rel.69498 have a Buffer Overflow.
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High 7.5
A heap buffer overflow vulnerability exists in NanoMQ 0.17.2. The vulnerability can be triggered by calling the functio…
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High 7.5
A heap buffer overflow vulnerability exists in NanoMQ 0.17.2. The vulnerability can be triggered by calling the functio…
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High 7.8
Horner Automation Cscape Out-of-bounds Write
Horner Automation Cscape lacks proper validation of user-supplied data when parsing project files (e.g., HMI). This could lead to an out-of-bounds write at CScape_EnvisionRV+0x2e374b. An attacker could leverage this vulnerability to execute arbitrary code in …
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High 7.8
Horner Automation Cscape Out-of-bounds Write
Horner Automation Cscape lacks proper validation of user-supplied data when parsing project files (e.g., HMI). This could lead to an out-of-bounds write at CScape_EnvisionRV+0x2e3c04. An attacker could leverage this vulnerability to potentially execute arbitr…
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High 7.3
In cp_dump driver, there is a possible out of bounds write due to a missing bounds check. This could lead to local deni…
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High 7.5
A heap buffer overflow vulnerability exists in NanoMQ 0.17.2. The vulnerability can be triggered by calling the functio…
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High 7.8
A buffer overflow in EasyPlayerPro-Win v3.2.19.0106 to v3.6.19.0823 allows attackers to cause a Denial of Service (DoS)…
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High 7.5
Tenda AC8V4.0-V16.03.34.06 was discovered to contain a stack overflow via the shareSpeed parameter in the fromSetWifiGu…
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High 8.8
Memory safety bugs present in Firefox 110 and Firefox ESR 102.8. Some of these bugs showed evidence of memory corruptio…
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High 8.8
Memory safety bugs present in Firefox 110. Some of these bugs showed evidence of memory corruption and we presume that …
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High 8.8
Memory safety bugs present in Firefox 111. Some of these bugs showed evidence of memory corruption and we presume that …
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High 8.8
Memory safety bugs fixed in Firefox 109
Mozilla developers and the Mozilla Fuzzing Team reported memory safety bugs present in Firefox 108. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. T…
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High 8.8
Memory safety bugs fixed in Firefox 109 and Firefox ESR 102.7
Mozilla developers and the Mozilla Fuzzing Team reported memory safety bugs present in Firefox 108 and Firefox ESR 102.6. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to…
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High 8.8
When encoding data from an <code>inputStream</code> in <code>xpcom</code> the size of the input being encoded was not c…
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High 8.8
Memory safety bugs present in Firefox 109. Some of these bugs showed evidence of memory corruption and we presume that …
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High 8.8
Memory safety bugs present in Firefox ESR 102.7. Some of these bugs showed evidence of memory corruption and we presume…
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High 7.5
OpenPrinting CUPS vulnerable to heap buffer overflow
OpenPrinting CUPS is an open source printing system. In versions 2.4.2 and prior, a heap buffer overflow vulnerability would allow a remote attacker to launch a denial of service (DoS) attack. A buffer overflow vulnerability in the function `format_log_line` …
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High 7.8
Heap Buffer Overflow in the erofsfsck_dirent_iter function in fsck/main.c in erofs-utils v1.6 allows remote attackers t…
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High 7.8
Heap Buffer Overflow in the erofs_read_one_data function at data.c in erofs-utils v1.6 allows remote attackers to execu…
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High 7.2
H3C Magic R300 version R300-2100MV100R004 was discovered to contain a stack overflow via the AddWlanMacList interface a…
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High 7.2
H3C Magic R300 version R300-2100MV100R004 was discovered to contain a stack overflow via the UpdateWanParams interface …
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High 7.2
H3C Magic R300 version R300-2100MV100R004 was discovered to contain a stack overflow via the DelSTList interface at /go…
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High 7.2
H3C Magic R300 version R300-2100MV100R004 was discovered to contain a stack overflow via the Edit_BasicSSID interface a…
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High 8.8
TOTOLINK X5000R V9.1.0u.6118_B20201102 and V9.1.0u.6369_B20230113 contains a post-authentication buffer overflow via pa…
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High 7.2
H3C Magic R300 version R300-2100MV100R004 was discovered to contain a stack overflow via the Edit_BasicSSID_5G interfac…
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High 7.2
H3C Magic R300 version R300-2100MV100R004 was discovered to contain a stack overflow via the DelDNSHnList interface at …
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High 7.2
H3C Magic R300 version R300-2100MV100R004 was discovered to contain a stack overflow via the AddMacList interface at /g…
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High 7.2CVE-2023-33629 Scanner template
H3C Magic R300 version R300-2100MV100R004 was discovered to contain a stack overflow via the DeltriggerList interface a…
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High 7.2
H3C Magic R300 version R300-2100MV100R004 was discovered to contain a stack overflow via the ipqos_lanip_editlist inter…
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High 7.2
H3C Magic R300 version R300-2100MV100R004 was discovered to contain a stack overflow via the UpdateMacClone interface a…
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High 7.2
H3C Magic R300 version R300-2100MV100R004 was discovered to contain a stack overflow via the DelvsList interface at /go…
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High 7.2
H3C Magic R300 version R300-2100MV100R004 was discovered to contain a stack overflow via the SetMobileAPInfoById interf…
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High 7.2
H3C Magic R300 version R300-2100MV100R004 was discovered to contain a stack overflow via the SetAPWifiorLedInfoById int…