cve.bz

CWE-20: Improper Input Validation, page 200

Filter

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

What the weakness is: CWE-20 at MITRE. OWASP Top 10: A05:2025 Injection

Related attack patterns (CAPEC): 51
  • CAPEC-3 Using Leading 'Ghost' Character Sequences to Bypass Input Filters Likelihood: Medium · Severity: Medium
  • CAPEC-7 Blind SQL Injection Likelihood: High · Severity: High
  • CAPEC-8 Buffer Overflow in an API Call Likelihood: High · Severity: High
  • CAPEC-9 Buffer Overflow in Local Command-Line Utilities Likelihood: High · Severity: High
  • CAPEC-10 Buffer Overflow via Environment Variables Likelihood: High · Severity: High
  • CAPEC-13 Subverting Environment Variable Values Likelihood: High · Severity: Very High
  • CAPEC-14 Client-side Injection-induced Buffer Overflow Likelihood: Medium · Severity: High
  • CAPEC-22 Exploiting Trust in Client Likelihood: High · Severity: High
  • CAPEC-23 File Content Injection Likelihood: High · Severity: Very High
  • CAPEC-24 Filter Failure through Buffer Overflow Likelihood: High · Severity: High
  • CAPEC-28 Fuzzing Likelihood: High · Severity: Medium
  • CAPEC-31 Accessing/Intercepting/Modifying HTTP Cookies Likelihood: High · Severity: High
  • CAPEC-42 MIME Conversion Likelihood: High · Severity: High
  • CAPEC-43 Exploiting Multiple Input Interpretation Layers Likelihood: Medium · Severity: High
  • CAPEC-45 Buffer Overflow via Symbolic Links Likelihood: High · Severity: High
  • CAPEC-46 Overflow Variables and Tags Likelihood: High · Severity: High
  • CAPEC-47 Buffer Overflow via Parameter Expansion Likelihood: Medium · Severity: High
  • CAPEC-52 Embedding NULL Bytes Likelihood: High · Severity: High
  • CAPEC-53 Postfix, Null Terminate, and Backslash Likelihood: High · Severity: High
  • CAPEC-63 Cross-Site Scripting (XSS) Likelihood: High · Severity: Very High
  • CAPEC-64 Using Slashes and URL Encoding Combined to Bypass Validation Logic Likelihood: High · Severity: High
  • CAPEC-67 String Format Overflow in syslog() Likelihood: High · Severity: Very High
  • CAPEC-71 Using Unicode Encoding to Bypass Validation Logic Likelihood: Medium · Severity: High
  • CAPEC-72 URL Encoding Likelihood: High · Severity: High
  • CAPEC-73 User-Controlled Filename Likelihood: High · Severity: High
  • CAPEC-78 Using Escaped Slashes in Alternate Encoding Likelihood: High · Severity: High
  • CAPEC-79 Using Slashes in Alternate Encoding Likelihood: High · Severity: High
  • CAPEC-80 Using UTF-8 Encoding to Bypass Validation Logic Likelihood: High · Severity: High
  • CAPEC-81 Web Server Logs Tampering Likelihood: Medium · Severity: High
  • CAPEC-83 XPath Injection Likelihood: High · Severity: High
  • CAPEC-85 AJAX Footprinting Likelihood: High · Severity: Low
  • CAPEC-88 OS Command Injection Likelihood: High · Severity: High
  • CAPEC-101 Server Side Include (SSI) Injection Likelihood: High · Severity: High
  • CAPEC-104 Cross Zone Scripting Likelihood: Medium · Severity: High
  • CAPEC-108 Command Line Execution through SQL Injection Likelihood: Low · Severity: Very High
  • CAPEC-109 Object Relational Mapping Injection Likelihood: Low · Severity: High
  • CAPEC-110 SQL Injection through SOAP Parameter Tampering Likelihood: High · Severity: Very High
  • CAPEC-120 Double Encoding Likelihood: Low · Severity: Medium
  • CAPEC-135 Format String Injection Likelihood: High · Severity: High
  • CAPEC-136 LDAP Injection Likelihood: High · Severity: High
  • CAPEC-153 Input Data Manipulation Severity: Medium
  • CAPEC-182 Flash Injection Likelihood: High · Severity: Medium
  • CAPEC-209 XSS Using MIME Type Mismatch Severity: Medium
  • CAPEC-230 Serialized Data with Nested Payloads Likelihood: Medium · Severity: High
  • CAPEC-231 Oversized Serialized Data Payloads Likelihood: Medium · Severity: High
  • CAPEC-250 XML Injection Likelihood: High
  • CAPEC-261 Fuzzing for garnering other adjacent user/sensitive data Severity: Medium
  • CAPEC-267 Leverage Alternate Encoding Likelihood: High · Severity: High
  • CAPEC-473 Signature Spoof
  • CAPEC-588 DOM-Based XSS Likelihood: High · Severity: Very High
  • CAPEC-664 Server Side Request Forgery Likelihood: High · Severity: High

The attack patterns MITRE's CAPEC relates to CWE-20, as MITRE names them. Credits.

Ask an AI about CWE-20

ChatGPTClaudeGoogle AI Mode

Show the promptExplain CWE-20: Improper Input Validation and how to prevent and detect it in code. Use https://cwe.mitre.org/data/definitions/20.html and https://cve.bz/cve/cwe/20?via=ask-ai-copy for recent CVEs with this weakness. Cite the sources.

Opens a third-party assistant; its answer is its own, not cve.bz's. The prompt holds only this weakness's id and public links.

  1. 7.5CVE-2016-1328ExploitEPSS 9.3%

    goform/WClientMACList on Cisco EPC3928 devices allows remote attackers to cause a denial of service (device crash) via a long h_sortWireless parameter, related to a "Gateway Client List Denial of Service" issue, aka Bug ID CSCux24948.

  2. 8.2CVE-2016-1441EPSS 1.1%

    Cisco Cloud Network Automation Provisioner (CNAP) 1.0(0) in Cisco Configuration Assistant (CCA) allows remote attackers to bypass intended filesystem and administrative-endpoint restrictions via GET API calls, aka Bug ID CSCuy77145.

  3. 8.8CVE-2016-1408EPSS 2.5%

    Cisco Prime Infrastructure 1.2 through 3.1 and Evolved Programmable Network Manager (EPNM) 1.2 and 2.0 allow remote authenticated users to execute arbitrary commands or upload files via a crafted HTTP request, aka Bug ID CSCuz01488.

  4. 4.3CVE-2016-0398EPSS 1.2%

    IBM Cognos Analytics (CA) 11.0 before 11.0.2 allows remote attackers to conduct content-spoofing attacks via a crafted URL.

  5. 8.4CVE-2016-3646ExploitEPSS 18%

    The AntiVirus Decomposer engine in Symantec Advanced Threat Protection (ATP); Symantec Data Center Security:Server (SDCS:S) 6.x through 6.6 MP1; Symantec Web Gateway; Symantec Endpoint Protection (SEP) before 12.1 RU6 MP5; Symantec Endpoin…

  6. 8.4CVE-2016-3644ExploitEPSS 18%

    The AntiVirus Decomposer engine in Symantec Advanced Threat Protection (ATP); Symantec Data Center Security:Server (SDCS:S) 6.x through 6.6 MP1; Symantec Web Gateway; Symantec Endpoint Protection (SEP) before 12.1 RU6 MP5; Symantec Endpoin…

  7. 8.4CVE-2016-2207ExploitEPSS 18%

    The AntiVirus Decomposer engine in Symantec Advanced Threat Protection (ATP); Symantec Data Center Security:Server (SDCS:S) 6.x through 6.6 MP1; Symantec Web Gateway; Symantec Endpoint Protection (SEP) before 12.1 RU6 MP5; Symantec Endpoin…

  8. 7.5CVE-2016-5301EPSS 2.8%

    The parse_chunk_header function in libtorrent before 1.1.1 allows remote attackers to cause a denial of service (crash) via a crafted (1) HTTP response or possibly a (2) UPnP broadcast.

  9. 7.5CVE-2015-8899EPSS 2.5%

    Dnsmasq before 2.76 allows remote servers to cause a denial of service (crash) via a reply with an empty DNS address that has an (1) A or (2) AAAA record defined locally.

  10. 7.2CVE-2016-5840ExploitEPSS 7.8%

    hotfix_upload.cgi in Trend Micro Deep Discovery Inspector (DDI) 3.7, 3.8 SP1 (3.81), and 3.8 SP2 (3.82) allows remote administrators to execute arbitrary code via shell metacharacters in the filename parameter of the Content-Disposition he…

  11. 7.8CVE-2016-5828EPSS 0.4%

    The start_thread function in arch/powerpc/kernel/process.c in the Linux kernel through 4.6.3 on powerpc platforms mishandles transactional state, which allows local users to cause a denial of service (invalid process state or TM Bad Thing …

  12. 5.6CVE-2016-4825EPSS 2.9%

    The Collne Welcart e-Commerce plugin before 1.8.3 for WordPress allows remote attackers to conduct PHP object injection attacks and execute arbitrary PHP code via crafted serialized data.

  13. 7.5CVE-2016-1438EPSS 1.2%

    Cisco AsyncOS 9.7.0-125 on Email Security Appliance (ESA) devices allows remote attackers to bypass intended spam filtering via crafted executable content in a ZIP archive, aka Bug ID CSCuy39210.

  14. 6.5CVE-2016-1434EPSS 0.8%

    The license-certificate upload functionality on Cisco 8800 phones with software 11.0(1) allows remote authenticated users to delete arbitrary files via an invalid file, aka Bug ID CSCuz03010.

  15. 6.5CVE-2016-4530EPSS 1.4%

    OSIsoft PI SQL Data Access Server (aka OLE DB) 2016 1.5 allows remote authenticated users to cause a denial of service (service outage and data loss) via a message.

  16. 6.5CVE-2016-4518EPSS 1.2%

    OSIsoft PI AF Server before 2016 2.8.0 allows remote authenticated users to cause a denial of service (service outage) via a message.

  17. 9.8CVE-2016-1395EPSS 4.8%

    The web-based management interface on Cisco RV110W devices with firmware before 1.2.1.7, RV130W devices with firmware before 1.0.3.16, and RV215W devices with firmware before 1.3.0.8 allows remote attackers to execute arbitrary code as roo…

  18. 6.1CVE-2016-5433EPSS 0.4%

    Citrix iOS Receiver before 7.0 allows attackers to cause TLS certificates to be incorrectly validated via unspecified vectors.

  19. 6.0CVE-2016-2841EPSS 0.4%

    The ne2000_receive function in the NE2000 NIC emulation support (hw/net/ne2000.c) in QEMU before 2.5.1 allows local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) via crafted values for the PSTA…

  20. 7.5CVE-2016-5361EPSS 2.7%

    programs/pluto/ikev1.c in libreswan before 3.17 retransmits in initial-responder states, which allows remote attackers to cause a denial of service (traffic amplification) via a spoofed UDP packet. NOTE: the original behavior complies with…

  21. 9.8CVE-2016-4165EPSS 3.8%

    The extension manager in Adobe Brackets before 1.7 allows attackers to have an unspecified impact via invalid input.

  22. 5.0CVE-2016-3230EPSS 2.7%

    The Search component in Microsoft Windows 7, Windows Server 2008 R2 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, and Windows 10 Gold and 1511 allows local users to cause a denial of service (performance degradation) v…

  23. 8.8CVE-2016-3228EPSS 13%

    Microsoft Windows Server 2008 SP2 and R2 SP1 and Windows Server 2012 Gold and R2 allow remote authenticated users to execute arbitrary code via a crafted NetLogon request, aka "Windows Netlogon Memory Corruption Remote Code Execution Vulne…

  24. 7.5CVE-2016-3207EPSS 17%

    The Microsoft (1) JScript 5.8 and (2) VBScript 5.7 and 5.8 engines, as used in Internet Explorer 9 through 11 and other products, allow remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a craft…

  25. 7.5CVE-2016-3206EPSS 15%

    The Microsoft (1) JScript 5.8 and (2) VBScript 5.7 and 5.8 engines, as used in Internet Explorer 9 through 11 and other products, allow remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a craft…

  26. 7.5CVE-2016-3205EPSS 15%

    The Microsoft (1) JScript 5.8 and (2) VBScript 5.7 and 5.8 engines, as used in Internet Explorer 9 through 11 and other products, allow remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a craft…

  27. 7.8CVE-2016-3203EPSS 33%

    Microsoft Windows 8.1, Windows Server 2012 Gold and R2, Windows 10 Gold and 1511, and Microsoft Edge allow remote attackers to execute arbitrary code via a crafted PDF document, aka "Windows PDF Remote Code Execution Vulnerability."

  28. 7.5CVE-2016-3202EPSS 17%

    The Microsoft (1) Chakra JavaScript, (2) JScript, and (3) VBScript engines, as used in Microsoft Internet Explorer 10 and 11 and Microsoft Edge, allow remote attackers to execute arbitrary code or cause a denial of service (memory corrupti…

  29. 7.3CVE-2016-0025EPSS 17%

    Microsoft Word 2007 SP3, Office 2010 SP2, Word 2010 SP2, Word 2013 SP1, Word 2013 RT SP1, Office 2016, Word 2016, Word for Mac 2011, Word 2016 for Mac, Office Compatibility Pack SP3, Word Automation Services on SharePoint Server 2010 SP2, …

  30. 7.5CVE-2016-4579EPSS 3.3%

    Libksba before 1.3.4 allows remote attackers to cause a denial of service (out-of-bounds read and crash) via unspecified vectors, related to the "returned length of the object from _ksba_ber_parse_tl."

  31. 7.5CVE-2016-4353EPSS 2.1%

    ber-decoder.c in Libksba before 1.3.3 does not properly handle decoder stack overflows, which allows remote attackers to cause a denial of service (abort) via crafted BER data.

  32. 7.5CVE-2016-1542ExploitEPSS 75%

    The RPC API in RSCD agent in BMC BladeLogic Server Automation (BSA) 8.2.x, 8.3.x, 8.5.x, 8.6.x, and 8.7.x on Linux and UNIX allows remote attackers to bypass authorization and enumerate users by sending an action packet to xmlrpc after an …

  33. 5.5CVE-2016-2495EPSS 0.6%

    SampleTable.cpp in libstagefright in mediaserver in Android 4.x before 4.4.4, 5.0.x before 5.0.2, 5.1.x before 5.1.1, and 6.x before 2016-06-01 allows remote attackers to cause a denial of service (device hang or reboot) via a crafted file…

  34. 7.8CVE-2016-2487EPSS 0.5%

    libstagefright in mediaserver in Android 4.x before 4.4.4, 5.0.x before 5.0.2, 5.1.x before 5.1.1, and 6.x before 2016-06-01 allows attackers to gain privileges via a crafted application, as demonstrated by obtaining Signature or Signature…

  35. 7.8CVE-2016-2486EPSS 0.4%

    mp3dec/SoftMP3.cpp in libstagefright in mediaserver in Android 4.x before 4.4.4, 5.0.x before 5.0.2, 5.1.x before 5.1.1, and 6.x before 2016-06-01 does not validate the relationship between allocated memory and the frame size, which allows…

  36. 7.8CVE-2016-2480EPSS 0.4%

    The mm-video-v4l2 vidc component in mediaserver in Android 4.x before 4.4.4, 5.0.x before 5.0.2, 5.1.x before 5.1.1, and 6.x before 2016-06-01 does not validate certain OMX parameter data structures, which allows attackers to gain privileg…

  37. 7.8CVE-2016-2478EPSS 0.4%

    mm-video-v4l2/vidc/vdec/src/omx_vdec_msm8974.cpp in mediaserver in Android 4.x before 4.4.4, 5.0.x before 5.0.2, 5.1.x before 5.1.1, and 6.x before 2016-06-01 mishandles pointers, which allows attackers to gain privileges via a crafted app…

  38. 7.8CVE-2016-2477EPSS 0.5%

    mm-video-v4l2/vidc/vdec/src/omx_vdec_msm8974.cpp in mediaserver in Android 4.x before 4.4.4, 5.0.x before 5.0.2, 5.1.x before 5.1.1, and 6.x before 2016-06-01 mishandles pointers, which allows attackers to gain privileges via a crafted app…

  39. 7.8CVE-2016-2475EPSS 0.5%

    The Broadcom Wi-Fi driver in Android before 2016-06-01 on Nexus 5, Nexus 6, Nexus 6P, Nexus 7 (2013), Nexus 9, Nexus Player, and Pixel C devices allows attackers to gain privileges for certain system calls via a crafted application, aka in…

  40. 7.8CVE-2016-2464EPSS 1.8%

    libvpx in libwebm in mediaserver in Android 4.x before 4.4.4, 5.0.x before 5.0.2, 5.1.x before 5.1.1, and 6.x before 2016-06-01 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafte…

  41. 7.5CVE-2016-3706EPSS 5.9%

    Stack-based buffer overflow in the getaddrinfo function in sysdeps/posix/getaddrinfo.c in the GNU C Library (aka glibc or libc6) allows remote attackers to cause a denial of service (crash) via vectors involving hostent conversion. NOTE: t…

  42. 9.8CVE-2016-2786EPSS 1.6%

    The pxp-agent component in Puppet Enterprise 2015.3.x before 2015.3.3 and Puppet Agent 1.3.x before 1.3.6 does not properly validate server certificates, which might allow remote attackers to spoof brokers and execute arbitrary commands vi…

  43. 8.1CVE-2016-1419EPSS 0.7%

    Cisco Access Point devices with software 8.2(102.43) allow remote attackers to cause a denial of service (device reload) via crafted ARP packets, aka Bug ID CSCuy55803.

  44. 7.1CVE-2016-4449EPSS 1.7%

    XML external entity (XXE) vulnerability in the xmlStringLenDecodeEntities function in parser.c in libxml2 before 2.9.4, when not in validating mode, allows context-dependent attackers to read arbitrary files or cause a denial of service (r…

  45. 9.8CVE-2016-4368EPSS 4.7%

    HPE Universal CMDB 10.0 through 10.21, Universal CMDB Configuration Manager 10.0 through 10.21, and Universal Discovery 10.0 through 10.21 allow remote attackers to execute arbitrary commands via a crafted serialized Java object, related t…

  46. 7.8CVE-2016-1418EPSS 0.4%

    Cisco Aironet Access Point Software 8.2(100.0) on 1830e, 1830i, 1850e, 1850i, 2800, and 3800 access points allows local users to obtain Linux root access via crafted CLI command parameters, aka Bug ID CSCuy64037.

  47. 7.5CVE-2016-4545EPSS 1.8%

    Virtual servers in F5 BIG-IP 11.5.4, when SSL profiles are enabled, allow remote attackers to cause a denial of service (resource consumption and Traffic Management Microkernel restart) via an SSL alert during the handshake.

  48. 5.3CVE-2016-3093EPSS 8.4%

    Apache Struts 2.0.0 through 2.3.24.1 does not properly cache method references when used with OGNL before 3.0.12, which allows remote attackers to cause a denial of service (block access to a web site) via unspecified vectors.

  49. 9.8CVE-2016-3087ExploitEPSS 82%

    Apache Struts 2.3.19 to 2.3.20.2, 2.3.21 to 2.3.24.1, and 2.3.25 to 2.3.28, when Dynamic Method Invocation is enabled, allow remote attackers to execute arbitrary code via vectors related to an ! (exclamation mark) operator to the REST Plu…

  50. 9.8CVE-2014-9746EPSS 3.3%

    The (1) t1_parse_font_matrix function in type1/t1load.c, (2) cid_parse_font_matrix function in cid/cidload.c, (3) t42_parse_font_matrix function in type42/t42parse.c, and (4) ps_parser_load_field function in psaux/psobjs.c in FreeType befo…