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
In wlan driver, there is a possible out of bounds write due to improper input validation. This could lead to local esca…
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Critical 9.8
In wlan service, there is a possible out of bounds write due to improper input validation. This could lead to remote co…
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Critical 9.8
Ethercat Zeek Plugin Out-of-bounds Write
Industrial Control Systems Network Protocol Parsers (ICSNPP) - Ethercat Zeek Plugin versions d78dda6 and prior are vulnerable to out-of-bounds write while analyzing specific Ethercat datagrams. This could allow an attacker to cause arbitrary code execution.
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Critical 9.8
Ethercat Zeek Plugin Out-of-bounds Write
Industrial Control Systems Network Protocol Parsers (ICSNPP) - Ethercat Zeek Plugin versions d78dda6 and prior are vulnerable to out-of-bounds write in their primary analyses function for Ethercat communication packets. This could allow an attacker to cause a…
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Critical 9.8
An out-of-bounds write vulnerability exists in the BrainVisionMarker Parsing functionality of The Biosig Project libbio…
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Critical 9.1
Stack overflow vulnerability in the NFC module.Successful exploitation of this vulnerability may affect service availab…
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Critical 9.6
A out-of-bounds write vulnerability in Fortinet FortiOS 7.4.0 through 7.4.2, FortiOS 7.2.0 through 7.2.6, FortiOS 7.0.0…
KEV Feb 9, 2024 -
Critical 9.8
Jsish v3.5.0 was discovered to contain a heap-buffer-overflow in ./src/jsiUtils.c.
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Critical 9.8
Jsish v3.5.0 (commit 42c694c) was discovered to contain a stack-overflow via the component IterGetKeysCallback at /jsis…
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Critical 9.8
Buffer overflow in CPCA PCFAX number process of Office Multifunction Printers and Laser Printers(*) which may allow an …
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Critical 9.8
Buffer overflow in CPCA Color LUT Resource Download process of Office Multifunction Printers and Laser Printers(*) whic…
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Critical 9.8
Buffer overflow in SLP attribute request process of Office Multifunction Printers and Laser Printers(*) which may allow…
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Critical 9.8
Buffer overflow in the Address Book username process in authentication of Mobile Device Function of Office Multifunctio…
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Critical 9.8
Buffer overflow in WSD probe request process of Office Multifunction Printers and Laser Printers(*) which may allow an …
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Critical 9.8
Buffer overflow in the Address Book password process in authentication of Mobile Device Function of Office Multifunctio…
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Critical 9.8
Buffer overflow in CPCA PDL Resource Download process of Office Multifunction Printers and Laser Printers(*) which may …
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Critical 9.8
D-Link Go-RT-AC750 GORTAC750_A1_FW_v101b03 contains a stack-based buffer overflow via the function genacgi_main. This v…
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Critical 9.8
Buffer Overflow vulnerability in the function setSchedWifi in Tenda AC9 v.3.0, firmware version v.15.03.06.42_multi all…
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Critical 9.8
Artifex Ghostscript before 9.53.0 has an out-of-bounds write and use-after-free in devices/vector/gdevtxtw.c (for txtwr…
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Critical 9.8
Heap-based buffer overflow vulnerability exists in HOME SPOT CUBE2 V102 and earlier. By processing invalid values, arbi…
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Critical 9.8
Stack Overflow vulnerability in the validate() function in Mathtex v.1.05 and before allows a remote attacker to execut…
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Critical 9.8
D-Link DIR-882 DIR882A1_FW130B06 was discovered to contain a stack overflow via the sub_477AA0 function.
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Critical 9.8
TOTOLINK A3700R_V9.1.2u.6165_20211012 has a stack overflow vulnerability via setParentalRules
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Critical 9.8
TOTOLINK_A3700R_V9.1.2u.6165_20211012has a stack overflow vulnerability via setLanguageCfg
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Critical 9.8
Xorg-x11-server: heap buffer overflow in devicefocusevent and procxiquerypointer
A flaw was found in X.Org server. Both DeviceFocusEvent and the XIQueryPointer reply contain a bit for each logical button currently down. Buttons can be arbitrarily mapped to any value up to 255, but the X.Org Server was only allocating space for the device'…
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Critical 9.8
A stack-based buffer overflow vulnerability in /bin/webs binary in Edimax BR6478AC V2 firmware veraion v1.23 allows att…
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Critical 9.8
In D-LINK Go-RT-AC750 v101b03, the sprintf function in the sub_40E700 function within the cgibin is susceptible to stac…
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Critical 9.8CVE-2024-21591 EPSS 18%
Junos OS: SRX Series and EX Series: Security Vulnerability in J-web allows a preAuth Remote Code Execution
An Out-of-bounds Write vulnerability in J-Web of Juniper Networks Junos OS on SRX Series and EX Series allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS), or Remote Code Execution (RCE) and obtain root privileges on the devic…
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Critical 9.8CVE-2023-31488 Public exploit
Hyland Perceptive Filters releases before 2023-12-08 (e.g., 11.4.0.2647), as used in Cisco IronPort Email Security Appl…
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Critical 9.8
Tenda AX1803 v1.0.0.1 contains a stack overflow via the adv.iptv.stballvlans parameter in the function formGetIptv.
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Critical 9.8
Tenda AX1803 v1.0.0.1 contains a stack overflow via the adv.iptv.stbpvid parameter in the function getIptvInfo.
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Critical 9.8
Tenda AX1803 v1.0.0.1 contains a stack overflow via the iptv.city.vlan parameter in the function setIptvInfo.
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Critical 9.8
Tenda AX1803 v1.0.0.1 contains a stack overflow via the iptv.stb.port parameter in the function formSetIptv.
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Critical 9.8
Tenda AX1803 v1.0.0.1 contains a stack overflow via the iptv.stb.port parameter in the function formGetIptv.
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Critical 9.8
Tenda AX1803 v1.0.0.1 contains a stack overflow via the adv.iptv.stballvlans parameter in the function setIptvInfo.
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Critical 9.8
Tenda AX1803 v1.0.0.1 contains a stack overflow via the iptv.stb.mode parameter in the function formGetIptv.
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Critical 9.8
Tenda AX1803 v1.0.0.1 contains a stack overflow via the iptv.stb.mode parameter in the function formSetIptv.
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Critical 9.8
Tenda AX1803 v1.0.0.1 contains a stack overflow via the iptv.stb.mode parameter in the function formSetIptv.
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Critical 9.8
Tenda AX1803 v1.0.0.1 contains a stack overflow via the adv.iptv.stbpvid parameter in the function formGetIptv.
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Critical 9.8
Tenda AX1803 v1.0.0.1 contains a stack overflow via the iptv.city.vlan parameter in the function getIptvInfo.