2017-10-05 09:29:00 2019-10-10 01:22:44

A vulnerability in the detection engine parsing of IPv6 packets for Cisco Firepower System Software could allow an unauthenticated, remote attacker to cause high CPU utilization or to cause a denial of service (DoS) condition because the Snort process restarts unexpectedly. The vulnerability is due to improper input validation of the fields in the IPv6 extension header packet. An attacker could exploit this vulnerability by sending a malicious IPv6 packet to the detection engine on the targeted device. An exploit could allow the attacker to cause a DoS condition if the Snort process restarts and traffic inspection is bypassed or traffic is dropped. This vulnerability is specific to IPv6 traffic only. This vulnerability affects Cisco Firepower System Software Releases 6.0 and later when the software has one or more file action policies configured and is running on any of the following Cisco products: 3000 Series Industrial Security Appliances (ISR), Adaptive Security Appliance (ASA) 5500-X Series with FirePOWER Services, Adaptive Security Appliance (ASA) 5500-X Series Next-Generation Firewalls, Advanced Malware Protection (AMP) for Networks, 7000 Series Appliances, Advanced Malware Protection (AMP) for Networks, 8000 Series Appliances, FirePOWER 7000 Series Appliances, FirePOWER 8000 Series Appliances, Firepower Threat Defense for Integrated Services Routers (ISRs), Firepower 2100 Series Security Appliances, Firepower 4100 Series Security Appliances, Firepower 9300 Series Security Appliances, Virtual Next-Generation Intrusion Prevention System (NGIPSv) for VMware. Cisco Bug IDs: CSCvd34776.

Vector

NETWORK

Complexity

LOW

Authentication

NONE

Confidentiality

NONE

Integrity

NONE

Availability

PARTIAL

Improper Input Validation (ID 20)

Related CAPEC 58 Buffer Overflow via Environment Variables (CAPEC-ID 10) Server Side Include (SSI) Injection (CAPEC-ID 101) Cross Zone Scripting (CAPEC-ID 104) Cross Site Scripting through Log Files (CAPEC-ID 106) Command Line Execution through SQL Injection (CAPEC-ID 108) Object Relational Mapping Injection (CAPEC-ID 109) SQL Injection through SOAP Parameter Tampering (CAPEC-ID 110) Subverting Environment Variable Values (CAPEC-ID 13) Format String Injection (CAPEC-ID 135) LDAP Injection (CAPEC-ID 136) Relative Path Traversal (CAPEC-ID 139) Client-side Injection-induced Buffer Overflow (CAPEC-ID 14) Variable Manipulation (CAPEC-ID 171) Embedding Scripts in Non-Script Elements (CAPEC-ID 18) Flash Injection (CAPEC-ID 182) Cross-Site Scripting Using Alternate Syntax (CAPEC-ID 199) Exploiting Trust in Client (aka Make the Client Invisible) (CAPEC-ID 22) XML Nested Payloads (CAPEC-ID 230) XML Oversized Payloads (CAPEC-ID 231) Filter Failure through Buffer Overflow (CAPEC-ID 24) Cross-Site Scripting via Encoded URI Schemes (CAPEC-ID 244) XML Injection (CAPEC-ID 250) Environment Variable Manipulation (CAPEC-ID 264) Global variable manipulation (CAPEC-ID 265) Leverage Alternate Encoding (CAPEC-ID 267) Fuzzing (CAPEC-ID 28) Using Leading 'Ghost' Character Sequences to Bypass Input Filters (CAPEC-ID 3) Accessing/Intercepting/Modifying HTTP Cookies (CAPEC-ID 31) Embedding Scripts in HTTP Query Strings (CAPEC-ID 32) MIME Conversion (CAPEC-ID 42) Exploiting Multiple Input Interpretation Layers (CAPEC-ID 43) Buffer Overflow via Symbolic Links (CAPEC-ID 45) Overflow Variables and Tags (CAPEC-ID 46) Buffer Overflow via Parameter Expansion (CAPEC-ID 47) Signature Spoof (CAPEC-ID 473) XML Client-Side Attack (CAPEC-ID 484) Embedding NULL Bytes (CAPEC-ID 52) Postfix, Null Terminate, and Backslash (CAPEC-ID 53) Simple Script Injection (CAPEC-ID 63) Using Slashes and URL Encoding Combined to Bypass Validation Logic (CAPEC-ID 64) SQL Injection (CAPEC-ID 66) String Format Overflow in syslog() (CAPEC-ID 67) Blind SQL Injection (CAPEC-ID 7) Using Unicode Encoding to Bypass Validation Logic (CAPEC-ID 71) URL Encoding (CAPEC-ID 72) User-Controlled Filename (CAPEC-ID 73) Using Escaped Slashes in Alternate Encoding (CAPEC-ID 78) Using Slashes in Alternate Encoding (CAPEC-ID 79) Buffer Overflow in an API Call (CAPEC-ID 8) Using UTF-8 Encoding to Bypass Validation Logic (CAPEC-ID 80) Web Logs Tampering (CAPEC-ID 81) XPath Injection (CAPEC-ID 83) AJAX Fingerprinting (CAPEC-ID 85) Embedding Script (XSS) in HTTP Headers (CAPEC-ID 86) OS Command Injection (CAPEC-ID 88) Buffer Overflow in Local Command-Line Utilities (CAPEC-ID 9) XSS in IMG Tags (CAPEC-ID 91) XML Parser Attack (CAPEC-ID 99)