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
761 results · Clear filters · Feed
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Critical 9.8
Netgear R7000P V1.3.0.8 is vulnerable to Buffer Overflow via parameter openvpn_server_ip.
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Critical 9.8
D-Link DIR-882 1.10B02 and1.20B06 is vulnerable to Buffer Overflow via the websRedirect function.
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Critical 9.8
Tenda AC1200 Router Model W15Ev2 V15.11.0.10(1576) was discovered to contain a stack overflow via the setRemoteWebManag…
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Critical 9.8
Tasmota before commit 066878da4d4762a9b6cb169fdf353e804d735cfd was discovered to contain a stack overflow via the Clien…
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Critical 9.8
WAGO I/O-Check Service prone to Out-of-bounds Write
In WAGO I/O-Check Service in multiple products an attacker can send a specially crafted packet containing OS commands to crash the diagnostic tool and write memory.
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Critical 9.6
Heap buffer overflow in Crashpad in Google Chrome on Android prior to 107.0.5304.106 allowed a remote attacker who had …
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Critical 9.8
Apache Commons BCEL prior to 6.6.0 allows producing arbitrary bytecode via out-of-bounds writing
Apache Commons BCEL has a number of APIs that would normally only allow changing specific class characteristics. However, due to an out-of-bounds writing issue, these APIs can be used to produce arbitrary bytecode. This could be abused in applications that pa…
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Critical 9.8
Tenda AC23 V16.03.07.45_cn was discovered to contain a stack overflow via the time parameter in the setSmartPowerManage…
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Critical 9.8
Tenda AC23 V16.03.07.45_cn was discovered to contain a stack overflow via the firewallEn parameter in the formSetFirewa…
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Critical 9.8
Tenda AC23 V16.03.07.45_cn was discovered to contain a stack overflow via the wpapsk_crypto parameter in the fromSetWir…
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Critical 9.8
Tenda AC23 V16.03.07.45_cn was discovered to contain a stack overflow via the shareSpeed parameter in the fromSetWifiGu…
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Critical 9.8
Tenda AC23 V16.03.07.45_cn was discovered to contain a stack overflow via the devName parameter in the formSetDeviceNam…
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Critical 9.8
Tenda AC23 V16.03.07.45_cn was discovered to contain a stack overflow via the list parameter in the formSetQosBand func…
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Critical 9.8
Tenda AC23 V16.03.07.45_cn was discovered to contain a stack overflow via the timeZone parameter in the fromSetSysTime …
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Critical 9.8
Tenda AC23 V16.03.07.45_cn was discovered to contain a stack overflow via the schedStartTime parameter in the setSchedW…
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Critical 9.8
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in tvOS 16.1, iOS 16.1 an…
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Critical 9.8
In Tenda ax1803 v1.0.0.1, the http requests handled by the fromAdvSetMacMtuWan functions, wanSpeed, cloneType, mac, can…
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Critical 9.8
D-Link DIR-816 A2 1.10 B05 was discovered to contain a stack overflow via the srcip parameter at /goform/form2IPQoSTcAd…
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Critical 9.8
D-Link DIR-816 A2 1.10 B05 was discovered to contain a stack overflow via the pskValue parameter in the setRepeaterSecu…
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Critical 9.8
D-Link DIR-816 A2 1.10 B05 was discovered to contain a stack overflow via the wizardstep54_pskpwd parameter at /goform/…
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Critical 9.8
D-Link DIR-816 A2 1.10 B05 was discovered to contain a stack overflow via the wizardstep4_pskpwd parameter at /goform/f…
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Critical 9.8
D-Link DIR-816 A2 1.10 B05 was discovered to contain a stack overflow via the pskValue parameter in the setSecurity fun…
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Critical 9.8
Stack-based buffer overflow in WTViewerE series WTViewerE 761941 from 1.31 to 1.61 and WTViewerEfree from 1.01 to 1.52 …
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Critical 9.8
Acer Altos W2000h-W570h F4 R01.03.0018 was discovered to contain a stack overflow in the RevserveMem component. This vu…
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Critical 9.8
Tenda TX3 US_TX3V1.0br_V16.03.13.11_multi_TDE01 was discovered to contain a stack overflow via the firewallEn parameter…
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Critical 9.8
Tenda TX3 US_TX3V1.0br_V16.03.13.11_multi_TDE01 was discovered to contain a stack overflow via the time parameter at /g…
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Critical 9.8
Tenda TX3 US_TX3V1.0br_V16.03.13.11_multi_TDE01 was discovered to contain a stack overflow via the list parameter at /g…
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Critical 9.8
Tenda TX3 US_TX3V1.0br_V16.03.13.11_multi_TDE01 was discovered to contain a stack overflow via the endIp parameter at /…
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Critical 9.8
Tenda TX3 US_TX3V1.0br_V16.03.13.11_multi_TDE01 was discovered to contain a stack overflow via the startIp parameter at…
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Critical 9.8
Tenda TX3 US_TX3V1.0br_V16.03.13.11_multi_TDE01 was discovered to contain a stack overflow via the timeZone parameter a…
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Critical 9.8
Tenda AC18 V15.03.05.19(6318) was discovered to contain a stack overflow via the time parameter in the fromSetSysTime f…
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Critical 9.8
Tenda AC10 V15.03.06.23 contains a Stack overflow vulnerability via /goform/addWifiMacFilter.
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Critical 9.8
Tenda AC10 V15.03.06.23 contains a Stack overflow vulnerability via /goform/formSetSpeedWan.
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Critical 9.8
Tenda AC10 V15.03.06.23 contains a Stack overflow vulnerability via /goform/formSetFirewallCfg.
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Critical 9.8
Tenda AC10 V15.03.06.23 contains a Stack overflow vulnerability via /goform/formSetClientState.
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Critical 9.8
Tenda AC10 V15.03.06.23 contains a Stack overflow vulnerability via /goform/formWifiWpsStart.
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Critical 9.8
Tenda AC10 V15.03.06.23 contains a Stack overflow vulnerability via /goform/fromNatStaticSetting.
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Critical 9.8
Tenda AC10 V15.03.06.23 contains a Stack overflow vulnerability via /goform/saveParentControlInfo.
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Critical 9.8
Tenda AC10 V15.03.06.23 contains a Stack overflow vulnerability via /goform/fromSetIpMacBind.
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Critical 9.8
Tenda AC10 V15.03.06.23 contains a Stack overflow vulnerability via /goform/formSetDeviceName.