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 7.1
NGINX ngx_http_mp4_module vulnerability CVE-2022-41742
NGINX Open Source before versions 1.23.2 and 1.22.1, NGINX Open Source Subscription before versions R2 P1 and R1 P1, and NGINX Plus before versions R27 P1 and R26 P1 have a vulnerability in the module ngx_http_mp4_module that might allow a local attacker to c…
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High 7.0CVE-2022-41741 Public exploit
NGINX ngx_http_mp4_module vulnerability CVE-2022-41741
NGINX Open Source before versions 1.23.2 and 1.22.1, NGINX Open Source Subscription before versions R2 P1 and R1 P1, and NGINX Plus before versions R27 P1 and R26 P1 have a vulnerability in the module ngx_http_mp4_module that might allow a local attacker to c…
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High 8.5
Git vulnerable to Remote Code Execution via Heap overflow in `git shell`
Git is an open source, scalable, distributed revision control system. `git shell` is a restricted login shell that can be used to implement Git's push/pull functionality via SSH. In versions prior to 2.30.6, 2.31.5, 2.32.4, 2.33.5, 2.34.5, 2.35.5, 2.36.3, and…
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High 7.5
jsonlint 1.0 is vulnerable to heap-buffer-overflow via /home/hjsz/jsonlint/src/lexer.
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High 7.8
GPAC 2.1-DEV-rev368-gfd054169b-master was discovered to contain a heap buffer overflow via the function gf_isom_box_dum…
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High 7.8
GPAC 2.1-DEV-rev368-gfd054169b-master was discovered to contain a heap buffer overflow via the function FixSDTPInTRAF a…
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High 7.5
Tenda AC15 V15.03.05.18 was discovered to contain a stack overflow via the timeZone parameter in the form_fast_setting_…
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High 7.5
The HwAirlink module has a heap overflow vulnerability.Successful exploitation of this vulnerability may cause out-of-b…
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High 7.8
A maliciously crafted PCT file when consumed through DesignReview.exe application could lead to memory corruption vulne…
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High 7.8
A maliciously crafted PKT file when consumed through SubassemblyComposer.exe application could lead to memory corruptio…
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High 7.8
An Out-Of-Bounds Write Vulnerability in Autodesk FBX SDK 2020 version and prior may lead to code execution through mali…
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High 7.8
A maliciously crafted PKT file when consumed through SubassemblyComposer.exe application could lead to memory corruptio…
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High 7.8
A maliciously crafted PKT file when consumed through SubassemblyComposer.exe application could lead to memory corruptio…
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High 7.8
In SitRilClient_OnResponse of SitRilSe.cpp, there is a possible out of bounds write due to a missing bounds check. This…
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High 7.8
In HTBLogKM of TBD, there is a possible out of bounds write due to a missing bounds check. This could lead to local esc…
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High 8.1
An issue was discovered in the Linux kernel before 5.19.16. Attackers able to inject WLAN frames could cause a buffer o…
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High 7.8
Bentley MicroStation and MicroStation-based applications may be affected by out-of-bounds and stack overflow issues whe…
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High 7.5
Tenda AC1206 US_AC1206V1.0RTL_V15.03.06.23_multi_TD01 was discovered to contain a heap overflow via sched_start_time pa…
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High 7.5
Tenda AC1206 US_AC1206V1.0RTL_V15.03.06.23_multi_TD01 was discovered to contain a stack overflow via sched_end_time par…
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High 7.5
Tenda AC1206 US_AC1206V1.0RTL_V15.03.06.23_multi_TD01 was discovered to contain a stack overflow via the function formW…
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High 7.8
Due to lack of proper memory management, when a victim opens a manipulated AutoCAD (.dwg, TeighaTranslator.exe) file re…
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High 7.8
Due to lack of proper memory management, when a victim opens a manipulated Jupiter Tesselation (.jt, JTReader.x3d) file…
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High 7.8
Due to lack of proper memory management, when a victim opens a manipulated Open Inventor File (.iv, vrml.x3d) file rece…
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High 7.8
Due to lack of proper memory management, when a victim opens a manipulated Right Hemisphere Binary (.rh, rh.x3d) file r…
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High 7.8
Due to lack of proper memory management, when a victim opens a manipulated Visual Design Stream (.vds, vds.x3d) file re…
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High 7.8
OMRON CX-Programmer Out-of-bounds Write
OMRON CX-Programmer 9.78 and prior is vulnerable to an Out-of-Bounds Write, which may allow an attacker to execute arbitrary code.
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High 7.8
OMRON CX-Programmer Out-of-bounds Write
OMRON CX-Programmer 9.78 and prior is vulnerable to an Out-of-Bounds Write, which may allow an attacker to execute arbitrary code.
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High 7.8
OMRON CX-Programmer Out-of-bounds Write
OMRON CX-Programmer 9.78 and prior is vulnerable to an Out-of-Bounds Write, which may allow an attacker to execute arbitrary code.
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High 7.8
A malicious crafted Dwg2Spd file when processed through Autodesk DWG application could lead to memory corruption vulner…
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High 7.4
Cisco Wireless LAN Controller AireOS Software FIPS Mode Denial of Service Vulnerability
A vulnerability in the authentication functionality of Cisco Wireless LAN Controller (WLC) AireOS Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insuf…
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High 7.5
In wolfSSL before 5.5.1, malicious clients can cause a buffer overflow during a TLS 1.3 handshake. This occurs when an …
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High 7.5
Networking OS10, versions 10.5.1.x, 10.5.2.x, and 10.5.3.x contain a vulnerability that could allow an attacker to caus…
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High 8.4
readelf in ToaruOS 2.0.1 has a global overflow allowing RCE when parsing a crafted ELF file.
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High 8.8
Heap buffer overflow in Window Manager in Google Chrome on Chrome OS, Lacros prior to 105.0.5195.52 allowed a remote at…
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High 8.8
Heap buffer overflow in Exosphere in Google Chrome on Chrome OS, Lacros prior to 105.0.5195.52 allowed a remote attacke…
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High 8.8
Heap buffer overflow in WebUI in Google Chrome on Chrome OS prior to 105.0.5195.52 allowed a remote attacker who convin…
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High 8.8
Insufficient validation of untrusted input in V8 in Google Chrome prior to 105.0.5195.52 allowed a remote attacker to p…
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High 8.8
Heap buffer overflow in Screen Capture in Google Chrome on Chrome OS prior to 105.0.5195.52 allowed a remote attacker w…
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High 8.8
Use after free in Layout in Google Chrome prior to 105.0.5195.52 allowed a remote attacker to potentially exploit heap …
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High 8.8
Unlimited strcpy on user input when setting a locale file leads to stack buffer overflow in mIPC camera firmware 5.3.1.…