Weakness (CWE)
CWE-120: Buffer Copy without Checking Size of Input
The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.
How to prevent it (8 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 your buffer is as large as you specify.
- 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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Implementation
Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, "boat" may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as "red" or "blue."
Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code's environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.
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Architecture and Design
For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server.
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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].
Source: MITRE CWE-120
1,826 results · Clear filters · Feed
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High 8.8
Tenda CH22 exeCommand formexeCommand buffer overflow
A vulnerability was determined in Tenda CH22 1.0.0.1. This vulnerability affects the function formexeCommand of the file /goform/exeCommand. Executing manipulation of the argument cmdinput can lead to buffer overflow. The attack may be performed from remote. …
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High 8.8
TOTOLINK A702R formParentControl sub_418030 buffer overflow
A vulnerability was determined in TOTOLINK A702R 4.0.0-B20211108.1423. This issue affects the function sub_418030 of the file /boafrm/formParentControl. Executing manipulation of the argument submit-url can lead to buffer overflow. The attack may be launched …
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High 8.8
TOTOLINK A702R formOneKeyAccessButton sub_4466F8 buffer overflow
A vulnerability was found in TOTOLINK A702R 4.0.0-B20211108.1423. This vulnerability affects the function sub_4466F8 of the file /boafrm/formOneKeyAccessButton. Performing manipulation of the argument submit-url results in buffer overflow. The attack may be i…
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High 8.8
TOTOLINK A702R formFilter sub_4162DC buffer overflow
A vulnerability has been found in TOTOLINK A702R 4.0.0-B20211108.1423. This affects the function sub_4162DC of the file /boafrm/formFilter. Such manipulation of the argument ip6addr leads to buffer overflow. The attack can be launched remotely. The exploit ha…
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High 8.8
TOTOLINK A702R formIpQoS sub_419BE0 buffer overflow
A flaw has been found in TOTOLINK A702R 4.0.0-B20211108.1423. Affected by this issue is the function sub_419BE0 of the file /boafrm/formIpQoS. This manipulation of the argument mac causes buffer overflow. The attack can be initiated remotely. The exploit has …
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High 8.8
TOTOLINK A702R formFilter sub_4162DC buffer overflow
A vulnerability was detected in TOTOLINK A702R 4.0.0-B20211108.1423. Affected by this vulnerability is the function sub_4162DC of the file /boafrm/formFilter. The manipulation of the argument ip6addr results in buffer overflow. It is possible to launch the at…
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High 8.4CVE-2010-10017 Public exploit
WM Downloader 3.1.2.2 Buffer Overflow via Malformed M3U File
WM Downloader version 3.1.2.2 is vulnerable to a buffer overflow when processing a specially crafted .m3u playlist file. The application fails to properly validate input length, allowing an attacker to overwrite structured exception handler (SEH) records and …
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High 8.8
Tenda CH22 editUserName formeditUserName buffer overflow
A flaw has been found in Tenda CH22 1.0.0.1. This vulnerability affects the function formeditUserName of the file /goform/editUserName. Executing manipulation of the argument new_account can lead to buffer overflow. It is possible to launch the attack remotel…
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High 7.0
D-Link DI-8100 16.07.26A1 is vulnerable to Buffer Overflow via the en`, `val and id parameters in the qj_asp function. …
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High 8.8
TOTOLINK A720R cstecgi.cgi setParentalRules buffer overflow
A security flaw has been discovered in TOTOLINK A720R 4.1.5cu.630_B20250509. This issue affects the function setParentalRules of the file /cgi-bin/cstecgi.cgi. Performing manipulation of the argument desc results in buffer overflow. The attack is possible to …
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High 8.5CVE-2011-10025 Public exploit
Subtitle Processor 7.7.1 .m3u SEH Unicode Buffer Overflow
Subtitle Processor 7.7.1 contains a buffer overflow vulnerability in its .m3u file parser. When a crafted playlist file is opened, the application converts input to Unicode and copies it to a fixed-size stack buffer without proper bounds checking. This allows…
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High 8.6CVE-2011-10022 Public exploit
SPlayer 3.7 Content-Type Header Buffer Overflow
SPlayer version 3.7 and earlier is vulnerable to a stack-based buffer overflow when processing HTTP responses containing an overly long Content-Type header. The vulnerability occurs due to improper bounds checking on the header value, allowing an attacker to …
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High 7.8
DGN File Parsing Memory Corruption Vulnerability
A maliciously crafted DGN file, when linked or imported into Autodesk AutoCAD, can force a Memory Corruption vulnerability. A malicious actor can leverage this vulnerability to execute arbitrary code in the context of the current process.
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High 8.8
Tenda AC7/AC18 SetLEDCfg formSetSchedLed buffer overflow
A vulnerability has been found in Tenda AC7 and AC18 15.03.05.19/15.03.06.44. Affected is the function formSetSchedLed of the file /goform/SetLEDCfg. The manipulation of the argument Time leads to buffer overflow. It is possible to launch the attack remotely.…
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High 8.8
Tenda CH22 editFileName formeditFileName buffer overflow
A vulnerability has been found in Tenda CH22 1.0.0.1. Affected by this issue is the function formeditFileName of the file /goform/editFileName. The manipulation leads to buffer overflow. The attack may be launched remotely. The exploit has been disclosed to t…
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High 8.8
Tenda CH22 delFileName formdelFileName buffer overflow
A vulnerability was identified in Tenda CH22 1.0.0.1. Affected by this vulnerability is the function formdelFileName of the file /goform/delFileName. The manipulation leads to buffer overflow. The attack can be launched remotely. The exploit has been disclose…
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High 8.6
Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Buffer Vulnerability
A vulnerability in the RADIUS proxy feature for the IPsec VPN feature of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial…
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High 8.8
Tenda AC20 saveParentControlInfo strcpy buffer overflow
A vulnerability was identified in Tenda AC20 up to 16.03.08.12. Affected by this vulnerability is the function strcpy of the file /goform/saveParentControlInfo. The manipulation of the argument Time leads to buffer overflow. The attack can be launched remotel…
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High 8.8
Tenda AC20 WifiGuestSet buffer overflow
A vulnerability was determined in Tenda AC20 up to 16.03.08.12. Affected is an unknown function of the file /goform/WifiGuestSet. The manipulation of the argument shareSpeed leads to buffer overflow. It is possible to launch the attack remotely. The exploit h…
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High 7.5
A buffer overflow vulnerability has been discovered in Netis WF2880 v2.1.40207 in the FUN_00473154 function of the cgit…
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High 7.5
A buffer overflow vulnerability has been discovered in the Netis WF2880 v2.1.40207 in the FUN_0047151c function of the …
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High 7.5
A buffer overflow vulnerability has been discovered in the Netis WF2880 v2.1.40207 in the FUN_004743f8 function of the …
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High 7.5
A buffer overflow vulnerability has been discovered in Netis WF2880 v2.1.40207 in the FUN_00471994 function of the cgit…
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High 7.5
A buffer overflow vulnerability has been discovered in Netis WF2880 v2.1.40207 in the Function_00465620 of the cgitest.…
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High 7.5
A buffer overflow vulnerability has been discovered in Netis WF2880 v2.1.40207 in the FUN_0046f984 function of the cgit…
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High 7.5
A buffer overflow vulnerability has been discovered in Netis WF2880 v2.1.40207 in the FUN_00475e1c function of the cgit…
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High 7.5
A buffer overflow vulnerability has been discovered in Netis WF2880 v2.1.40207 in the FUN_00476598 function of the cgit…
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High 8.4
bullet3 VHACD utility: stack-based buffer overflow in OFF parser (LoadOFF)
Stack-based buffer overflow in LoadOFF in bulletphysics bullet3 before 3.26 on all platforms allows remote attackers to execute arbitrary code via a crafted OFF file with an overlong initial token processed by the VHACD test utility or invoked indirectly thro…
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High 7.8
TGA File Parsing Memory Corruption Vulnerability
A maliciously crafted TGA file, when linked or imported into Autodesk 3ds Max, can force a Memory Corruption vulnerability. A malicious actor can leverage this vulnerability to execute arbitrary code in the context of the current process.
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High 7.3
Buffer Copy Without Checking Size of Input in Powerline Communication Firmware
Memory corruption while processing specific files in Powerline Communication Firmware.
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High 8.8
The issue was addressed with improved memory handling. This issue is fixed in Safari 18.6, iOS 18.6 and iPadOS 18.6, ma…
KEV Mar 20, 2026 -
High 7.8
X_T File Parsing Memory Corruption Vulnerability
A maliciously crafted X_T file, when parsed through certain Autodesk products, can force a Memory Corruption vulnerability. A malicious actor can leverage this vulnerability to execute arbitrary code in the context of the current process.
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High 8.8
TOTOLINK X15 HTTP POST Request formRoute buffer overflow
A vulnerability was found in TOTOLINK X15 1.0.0-B20230714.1105. It has been rated as critical. Affected by this issue is some unknown functionality of the file /boafrm/formRoute of the component HTTP POST Request Handler. The manipulation of the argument subm…
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High 8.8
TOTOLINK X15 HTTP POST Request formMultiAPVLAN buffer overflow
A vulnerability was found in TOTOLINK X15 1.0.0-B20230714.1105. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the file /boafrm/formMultiAPVLAN of the component HTTP POST Request Handler. The manipulation of th…
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High 8.8
TOTOLINK X15 HTTP POST Request formMapDelDevice buffer overflow
A vulnerability was found in TOTOLINK X15 1.0.0-B20230714.1105. It has been classified as critical. Affected is an unknown function of the file /boafrm/formMapDelDevice of the component HTTP POST Request Handler. The manipulation of the argument macstr leads …
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High 8.8
TOTOLINK X15 HTTP POST Request formMapDel buffer overflow
A vulnerability was found in TOTOLINK X15 1.0.0-B20230714.1105 and classified as critical. This issue affects some unknown processing of the file /boafrm/formMapDel of the component HTTP POST Request Handler. The manipulation of the argument devicemac1 leads …
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High 8.8
TOTOLINK X15 HTTP POST Request formFilter buffer overflow
A vulnerability has been found in TOTOLINK X15 1.0.0-B20230714.1105 and classified as critical. This vulnerability affects unknown code of the file /boafrm/formFilter of the component HTTP POST Request Handler. The manipulation of the argument ip6addr/url/vpn…
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High 8.8CVE-2025-8180 EPSS 12%
Tenda CH22 deleteUserName formdeleteUserName buffer overflow
A vulnerability, which was classified as critical, has been found in Tenda CH22 1.0.0.1. Affected by this issue is the function formdeleteUserName of the file /goform/deleteUserName. The manipulation of the argument old_account leads to buffer overflow. The a…
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High 8.8
TOTOLINK T6 MQTT Packet meshSlaveDlfw tcpcheck_net buffer overflow
A vulnerability classified as critical was found in TOTOLINK T6 4.1.5cu.748_B20211015. This vulnerability affects the function tcpcheck_net of the file /router/meshSlaveDlfw of the component MQTT Packet Handler. The manipulation of the argument serverIp leads…
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High 8.8
D-Link DIR-513 HTTP POST Request formSetWanPPTPpath formSetWanPPTPcallback buffer overflow
A vulnerability classified as critical has been found in D-Link DIR-513 1.10. This affects the function formSetWanPPTPcallback of the file /goform/formSetWanPPTPpath of the component HTTP POST Request Handler. The manipulation of the argument curTime leads to…