Buffer Copy without Checking Size of Input
CWE-120
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.
We track 2,043 vulnerabilities of this type. 100% are rated high or critical, and the average CVSS score is 8.6. 24 have been exploited in real attacks.
How this weakness is prevented
- 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.
- 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, and the Strsafe.h library from Microsoft. These libraries provide safer versions of overflow-prone string-handling functions.
- 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 discusses canary-based detection in detail.
- 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.
- 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. 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.
Latest Buffer Copy without Checking Size of Input vulnerabilities
- 8.8 High severity
A3002R: Improper Restriction of Operations within the Bounds of a Memory Buffer
A vulnerability classified as critical was found in TOTOLINK A3002R and A3002RU 3.0.0-B20230809.1615. This vulnerability affects unknown code of the file /boafrm/formFilter of the component HTTP POST Request Handler. The manipulation of the argument ip6addr le
- 8.8 High severity
A3002R: Improper Restriction of Operations within the Bounds of a Memory Buffer
A vulnerability classified as critical has been found in TOTOLINK A3002R and A3002RU 3.0.0-B20230809.1615. This affects an unknown part of the file /boafrm/formPortFw of the component HTTP POST Request Handler. The manipulation of the argument service_type/ip_
- 8.8 High severity
A3002R: Improper Restriction of Operations within the Bounds of a Memory Buffer
A vulnerability was found in TOTOLINK A3002R and A3002RU 3.0.0-B20230809.1615. It has been rated as critical. Affected by this issue is some unknown functionality of the file /boafrm/formMapDel of the component HTTP POST Request Handler. The manipulation of th
- 8.8 High severity
Safari: Improper Restriction of Operations within the Bounds of a Memory Buffer
The issue was addressed with improved checks. This issue is fixed in Safari 18.5, iOS 18.5 and iPadOS 18.5, macOS Sequoia 15.5, tvOS 18.5, visionOS 2.5, watchOS 11.5. Processing maliciously crafted web content may lead to memory corruption.
- 7.8 High severity
Simple Banking System: Buffer Copy without Checking Size of Input
A vulnerability was found in code-projects Simple Banking System up to 1.0. It has been rated as critical. This issue affects some unknown processing of the component Sign In. The manipulation of the argument password2 leads to buffer overflow. Attacking local
- 9.8 Critical severity
T10: Buffer Copy without Checking Size of Input
A vulnerability was found in TOTOLINK T10, A3100R, A950RG, A800R, N600R, A3000RU and A810R 4.1.8cu.5241_B20210927. It has been declared as critical. This vulnerability affects the function CloudACMunualUpdate of the file /cgi-bin/cstecgi.cgi. The manipulation
- 8.8 High severity
N150RT: Buffer Copy without Checking Size of Input
A vulnerability, which was classified as critical, has been found in TOTOLINK N150RT 3.4.0-B20190525. This issue affects some unknown processing of the file /boafrm/formWsc. The manipulation of the argument localPin leads to buffer overflow. The attack may be
- 9.8 Critical severity
DIR-619L: Buffer Copy without Checking Size of Input
A vulnerability was found in D-Link DIR-619L 2.04B04 and classified as critical. Affected by this issue is the function formSetWizard2. The manipulation of the argument curTime leads to buffer overflow. The attack may be launched remotely. The vendor was conta
- 9.8 Critical severity
DIR-619L: Buffer Copy without Checking Size of Input
A vulnerability has been found in D-Link DIR-619L 2.04B04 and classified as critical. Affected by this vulnerability is the function formSetWAN_Wizard52. The manipulation of the argument curTime leads to buffer overflow. The attack can be launched remotely. Th
- 9.8 Critical severity
DIR-619L: Buffer Copy without Checking Size of Input
A vulnerability, which was classified as critical, was found in D-Link DIR-619L 2.04B04. Affected is the function formSetEasy_Wizard. The manipulation of the argument curTime leads to buffer overflow. It is possible to launch the attack remotely. The vendor wa
- 9.8 Critical severity
DIR-619L: Buffer Copy without Checking Size of Input
A vulnerability, which was classified as critical, has been found in D-Link DIR-619L 2.04B04. This issue affects the function formEasySetupWizard3. The manipulation of the argument wan_connected leads to buffer overflow. The attack may be initiated remotely. T
- 9.8 Critical severity
DIR-619L: Buffer Copy without Checking Size of Input
A vulnerability classified as critical was found in D-Link DIR-619L 2.04B04. This vulnerability affects the function formEasySetupWizard. The manipulation of the argument curTime leads to buffer overflow. The attack can be initiated remotely. The vendor was co
- 8.0 High severity
GR-5400AX: Improper Restriction of Operations within the Bounds of a Memory Buffer
A vulnerability has been found in H3C GR-5400AX up to 100R008 and classified as critical. This vulnerability affects the function Edit_List_SSID of the file /goform/aspForm. The manipulation of the argument param leads to buffer overflow. The attack needs to b
- 9.8 Critical severity
DIR-605L: Buffer Copy without Checking Size of Input
A vulnerability was found in D-Link DIR-605L 2.13B01. It has been declared as critical. This vulnerability affects the function formSetWAN_Wizard55. The manipulation of the argument curTime leads to buffer overflow. The attack can be initiated remotely. The ve
- 9.8 Critical severity
DIR-605L: Buffer Copy without Checking Size of Input
A vulnerability was found in D-Link DIR-605L 2.13B01. It has been classified as critical. This affects the function formSetWAN_Wizard534. The manipulation of the argument curTime leads to buffer overflow. It is possible to initiate the attack remotely. The ven
- 8.0 High severity
GR-1800AX: Improper Restriction of Operations within the Bounds of a Memory Buffer
A vulnerability was found in H3C GR-1800AX up to 100R008 and classified as critical. Affected by this issue is the function EnableIpv6 of the file /goform/aspForm. The manipulation of the argument param leads to buffer overflow. Access to the local network is
- 7.8 High severity
Connext Professional: Buffer Copy without Checking Size of Input
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow'), Stack-based Buffer Overflow vulnerability in RTI Connext Professional (Core Libraries) allows Overflow Variables and Tags. This issue affects Connext Professional: from 7.4.0 before 7.5.0,
- 7.8 High severity
Linux: Buffer Copy without Checking Size of Input
In the Linux kernel, the following vulnerability has been resolved: udmabuf: fix a buf size overflow issue during udmabuf creation by casting size_limit_mb to u64 when calculate pglimit.
- 7.5 High severity
BIG-IP: Buffer Copy without Checking Size of Input
When an HTTP profile with the Enforce RFC Compliance option is configured on a virtual server, undisclosed requests can cause the Traffic Management Microkernel (TMM) to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are
- 7.5 High severity
BIG-IP: Buffer Copy without Checking Size of Input
When a BIG-IP APM virtual server is configured to use a PingAccess profile, undisclosed requests can cause TMM to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
- 9.8 Critical severity
AC8: Buffer Copy without Checking Size of Input
A vulnerability, which was classified as critical, was found in Tenda AC8 16.03.34.06. Affected is the function formGetRouterStatus of the file /goform/MtuSetMacWan. The manipulation of the argument shareSpeed leads to buffer overflow. It is possible to launch
- 9.8 Critical severity
DIR-600L: Buffer Copy without Checking Size of Input
A vulnerability was found in D-Link DIR-600L up to 2.07B01. It has been rated as critical. Affected by this issue is the function formSetWanL2TP. The manipulation of the argument host leads to buffer overflow. The attack may be launched remotely. This vulnerab
- 9.8 Critical severity
DIR-600L: Buffer Copy without Checking Size of Input
A vulnerability was found in D-Link DIR-600L up to 2.07B01. It has been declared as critical. Affected by this vulnerability is the function formWlSiteSurvey. The manipulation of the argument host leads to buffer overflow. The attack can be launched remotely.
- 9.8 Critical severity
DIR-600L: Buffer Copy without Checking Size of Input
A vulnerability was found in D-Link DIR-600L up to 2.07B01. It has been classified as critical. Affected is the function formSetWAN_Wizard534. The manipulation of the argument host leads to buffer overflow. It is possible to launch the attack remotely. This vu
- 9.8 Critical severity
DIR-600L: Buffer Copy without Checking Size of Input
A vulnerability was found in D-Link DIR-600L up to 2.07B01 and classified as critical. This issue affects the function formSetLog. The manipulation of the argument host leads to buffer overflow. The attack may be initiated remotely. This vulnerability only aff
- 9.8 Critical severity
DIR-600L: Buffer Copy without Checking Size of Input
A vulnerability, which was classified as critical, was found in D-Link DIR-600L up to 2.07B01. This affects the function formLogin. The manipulation of the argument host leads to buffer overflow. It is possible to initiate the attack remotely. This vulnerabili
- 9.8 Critical severity
DIR-600L: Buffer Copy without Checking Size of Input
A vulnerability has been found in D-Link DIR-600L up to 2.07B01 and classified as critical. This vulnerability affects the function formEasySetupWizard. The manipulation of the argument host leads to buffer overflow. The attack can be initiated remotely. This
- 9.8 Critical severity
DIR-600L: Buffer Copy without Checking Size of Input
A vulnerability, which was classified as critical, has been found in D-Link DIR-600L up to 2.07B01. Affected by this issue is the function formEasySetupWizard3. The manipulation of the argument host leads to buffer overflow. The attack may be launched remotely
- 9.8 Critical severity
AC1206: Buffer Copy without Checking Size of Input
A vulnerability was found in Tenda AC1206 up to 15.03.06.23. It has been rated as critical. This issue affects the function setSchedWifi of the file /goform/openSchedWifi. The manipulation leads to buffer overflow. The attack may be initiated remotely. The exp
- 9.8 Critical severity
AC1206: Buffer Copy without Checking Size of Input
A vulnerability was found in Tenda AC1206 up to 15.03.06.23. It has been declared as critical. This vulnerability affects the function formSetCfm of the file /goform/setcfm. The manipulation leads to buffer overflow. The attack can be initiated remotely. The e
- 9.8 Critical severity
FTP Server: Buffer Copy without Checking Size of Input
A vulnerability, which was classified as critical, has been found in PCMan FTP Server 2.0.7. This issue affects some unknown processing of the component SMNT Command Handler. The manipulation leads to buffer overflow. The attack may be initiated remotely. The
- 9.8 Critical severity
FTP Server: Buffer Copy without Checking Size of Input
A vulnerability classified as critical was found in PCMan FTP Server 2.0.7. This vulnerability affects unknown code of the component RNTO Command Handler. The manipulation leads to buffer overflow. The attack can be initiated remotely. The exploit has been dis
- 9.8 Critical severity
FTP Server: Buffer Copy without Checking Size of Input
A vulnerability classified as critical has been found in PCMan FTP Server 2.0.7. This affects an unknown part of the component RNFR Command Handler. The manipulation leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been
- 9.8 Critical severity
FTP Server: Buffer Copy without Checking Size of Input
A vulnerability classified as critical has been found in PCMan FTP Server 2.0.7. This affects an unknown part of the component RMD Command Handler. The manipulation leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been
- 9.8 Critical severity
FTP Server: Buffer Copy without Checking Size of Input
A vulnerability was found in PCMan FTP Server 2.0.7. It has been rated as critical. Affected by this issue is some unknown functionality of the component LIST Command Handler. The manipulation leads to buffer overflow. The attack may be launched remotely. The
- 9.8 Critical severity
FTP Server: Buffer Copy without Checking Size of Input
A vulnerability was found in PCMan FTP Server 2.0.7. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the component HASH Command Handler. The manipulation leads to buffer overflow. The attack can be launched remot
- 9.8 Critical severity
FTP Server: Buffer Copy without Checking Size of Input
A vulnerability was found in PCMan FTP Server 2.0.7. It has been classified as critical. Affected is an unknown function of the component APPEND Command Handler. The manipulation leads to buffer overflow. It is possible to launch the attack remotely. The explo
- 9.8 Critical severity
FTP Server: Buffer Copy without Checking Size of Input
A vulnerability was found in PCMan FTP Server 2.0.7 and classified as critical. This issue affects some unknown processing of the component RMDIR Command Handler. The manipulation leads to buffer overflow. The attack may be initiated remotely. The exploit has
- 9.8 Critical severity
FTP Server: Buffer Copy without Checking Size of Input
A vulnerability was found in PCMan FTP Server 2.0.7. It has been rated as critical. This issue affects some unknown processing of the component LCD Command Handler. The manipulation leads to buffer overflow. The attack may be initiated remotely. The exploit ha
- 9.8 Critical severity
FTP Server: Buffer Copy without Checking Size of Input
A vulnerability was found in PCMan FTP Server 2.0.7. It has been declared as critical. This vulnerability affects unknown code of the component TYPE Command Handler. The manipulation leads to buffer overflow. The attack can be initiated remotely. The exploit h