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CWE-119 (内存缓冲区边界内操作的限制不恰当) — Vulnerability Class 1064

1064 vulnerabilities classified as CWE-119 (内存缓冲区边界内操作的限制不恰当). AI Chinese analysis included.

CWE-119 represents a critical memory safety weakness where software performs read or write operations beyond the intended boundaries of a memory buffer. This flaw typically arises from insufficient validation of input lengths or loop counters, allowing attackers to manipulate program execution flow. By crafting malicious inputs that exceed buffer limits, adversaries can overwrite adjacent memory, corrupt data structures, or inject executable code, often leading to remote code execution or system crashes. Developers mitigate this risk by implementing rigorous bounds checking before any memory access, utilizing safe string handling functions that enforce length limits, and adopting modern programming languages with automatic memory management. Additionally, employing static analysis tools and fuzzing techniques during development helps identify out-of-bounds accesses early, ensuring that all buffer operations remain strictly within allocated memory regions to prevent exploitation.

MITRE CWE Description
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
Common Consequences (3)
Integrity, Confidentiality, AvailabilityExecute Unauthorized Code or Commands, Modify Memory
If the memory accessible by the attacker can be effectively controlled, it may be possible to execute arbitrary code, as with a standard buffer overflow. If the attacker can overwrite a pointer's worth of memory (usually 32 or 64 bits), they can alter the intended control flow by redirecting a funct…
Availability, ConfidentialityRead Memory, DoS: Crash, Exit, or Restart, DoS: Resource Consumption (CPU), DoS: Resource Consumption (Memory)
Out of bounds memory access will very likely result in the corruption of relevant memory, and perhaps instructions, possibly leading to a crash. Other attacks leading to lack of availability are possible, including putting the program into an infinite loop.
ConfidentialityRead Memory
In the case of an out-of-bounds read, the attacker may have access to sensitive information. If the sensitive information contains system details, such as the current buffer's position in memory, this knowledge can be used to craft further attacks, possibly with more severe consequences.
Mitigations (5)
RequirementsUse 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 lan…
Architecture and DesignUse 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.
Operation, Build and CompilationUse 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…
Effectiveness: Defense in Depth
ImplementationConsider 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…
Operation, Build and CompilationRun 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…
Effectiveness: Defense in Depth
Examples (2)
This example takes an IP address from a user, verifies that it is well formed and then looks up the hostname and copies it into a buffer.
void host_lookup(char *user_supplied_addr){ struct hostent *hp; in_addr_t *addr; char hostname[64]; in_addr_t inet_addr(const char *cp); /*routine that ensures user_supplied_addr is in the right format for conversion */ validate_addr_form(user_supplied_addr); addr = inet_addr(user_supplied_addr); hp = gethostbyaddr( addr, sizeof(struct in_addr), AF_INET); strcpy(hostname, hp->h_name); }
Bad · C
This example applies an encoding procedure to an input string and stores it into a buffer.
char * copy_input(char *user_supplied_string){ int i, dst_index; char *dst_buf = (char*)malloc(4*sizeof(char) * MAX_SIZE); if ( MAX_SIZE <= strlen(user_supplied_string) ){ die("user string too long, die evil hacker!"); } dst_index = 0; for ( i = 0; i < strlen(user_supplied_string); i++ ){ if( '&' == user_supplied_string[i] ){ dst_buf[dst_index++] = '&'; dst_buf[dst_index++] = 'a'; dst_buf[dst_index++] = 'm'; dst_buf[dst_index++] = 'p'; dst_buf[dst_index++] = ';'; } else if ('<' == user_supplied_string[i] ){ /* encode to &lt; */ } else dst_buf[dst_index++] = user_supplied_string[i]; } return ds
Bad · C
CVE IDTitleCVSSSeverityPublished
CVE-2017-12370 多款Cisco产品WebEx Recording Format Player和Advanced Recording Format Player 安全漏洞 — Cisco WebEx Recording Format and Advanced Recording Format Players 9.6 -2017-11-30
CVE-2017-12371 多款Cisco产品WebEx Recording Format Player和Advanced Recording Format Player 安全漏洞 — Cisco WebEx Recording Format and Advanced Recording Format Players 9.6 -2017-11-30
CVE-2017-12372 多款Cisco产品WebEx Recording Format Player和Advanced Recording Format Player 安全漏洞 — Cisco WebEx Recording Format and Advanced Recording Format Players 9.6 -2017-11-30
CVE-2017-12278 Cisco Wireless LAN Controller Simple Network Management Protocol子系统安全漏洞 — Cisco Wireless LAN Controller 6.3 -2017-11-02
CVE-2017-12280 Cisco Wireless LAN Controller 安全漏洞 — Cisco Wireless LAN Controller 7.5 -2017-11-02
CVE-2017-12282 Cisco Wireless LAN Controller 安全漏洞 — Cisco Wireless LAN Controller 6.1 -2017-11-02
CVE-2017-12283 Cisco Aironet 3800 Series Access Points 安全漏洞 — Cisco Aironet 3800 Series Access Points 5.3 -2017-11-02
CVE-2017-12259 Cisco Small Business SPA51x Series IP Phones 安全漏洞 — Cisco Small Business SPA51x Series IP Phones 7.5 -2017-10-19
CVE-2017-12260 Cisco Small Business SPA50x、SPA51x和SPA52x Series IP Phones 安全漏洞 — Cisco Small Business SPA50x, SPA51x, and SPA52x Series IP Phones 7.5 -2017-10-19
CVE-2017-12293 Cisco WebEx Meetings Server 安全漏洞 — Cisco WebEx Meetings Server 8.6 -2017-10-19
CVE-2017-12267 Cisco Wide Area Application Services 安全漏洞 — Cisco Wide Area Application Services 5.3 -2017-10-05
CVE-2017-12270 Cisco Network Convergence System 5500 Series Routers IOS XR Software 安全漏洞 — Cisco IOS XR 7.5 -2017-10-05
CVE-2017-6720 多款Cisco产品SSH子系统缓冲区错误漏洞 — Cisco Small Business Managed Switches 6.5 -2017-09-21
CVE-2017-6791 Cisco Unified Communications Manager 安全漏洞 — Cisco Unified Communications Manager 7.5 -2017-09-07
CVE-2017-12708 Advantech WebAccess 安全漏洞 — Advantech WebAccess 9.8 -2017-08-30
CVE-2017-9633 Continental AG Infineon S-Gold 2 (PMB 8876) chipset 安全漏洞 — Continental AG Infineon S-Gold 2 (PMB 8876) 8.8 -2017-08-07
CVE-2017-6745 Cisco Videoscape Distribution Suite for Television cache server 安全漏洞 — Cisco Videoscape Distribution Suite Cache Server 7.5 -2017-08-07
CVE-2017-6753 Google Chrome和Mozilla firefox for Windows Cisco WebEx Browser Extension 安全漏洞 — Cisco WebEx Browser Extension 8.8 -2017-07-25
CVE-2017-7506 spice 缓冲区错误漏洞 — spice 8.8 -2017-07-18
CVE-2017-6736 Cisco IOS和IOS XE Simple Network Management Protocol子系统缓冲区错误漏洞 — IOS 8.8 -2017-07-17
CVE-2017-6737 Cisco IOS和IOS XE Simple Network Management Protocol子系统缓冲区错误漏洞 — IOS 8.8 -2017-07-17
CVE-2017-6738 Cisco IOS和IOS XE Simple Network Management Protocol子系统缓冲区错误漏洞 — IOS 8.8 -2017-07-17
CVE-2017-6739 Cisco IOS和IOS XE Simple Network Management Protocol子系统缓冲区错误漏洞 — Universal Product 8.8 -2017-07-17
CVE-2017-6740 Cisco IOS和IOS XE Simple Network Management Protocol子系统缓冲区错误漏洞 — IOS 8.8 -2017-07-17
CVE-2017-6741 Cisco IOS和IOS XE Simple Network Management Protocol子系统缓冲区错误漏洞 — Cisco IOS XE Software 8.8 -2017-07-17
CVE-2017-6743 Cisco IOS和IOS XE Simple Network Management Protocol子系统缓冲区错误漏洞 — IOS 8.8 -2017-07-17
CVE-2017-6744 Cisco IOS和IOS XE Simple Network Management Protocol子系统缓冲区错误漏洞 — IOS 8.8 -2017-07-17
CVE-2017-9639 Fuji Electric V-Server 安全漏洞 — Fuji Electric V-Server 9.8 -2017-07-17
CVE-2017-6669 Cisco Webex Business Suite WebEx ARF Player 缓冲区错误漏洞 — Cisco WebEx Network Recording Player 8.6 -2017-06-26
CVE-2017-6633 Cisco UCS C-Series Rack Servers 安全漏洞 — Cisco UCS C-Series Rack Servers 7.5 -2017-05-22

Vulnerabilities classified as CWE-119 (内存缓冲区边界内操作的限制不恰当) represent 1064 CVEs. The CWE taxonomy describes the weakness; review individual CVEs for product-specific impact.