CVE-2018-0296
Cisco — Cisco Adaptive Security Appliance (ASA) Denial-of-Service Vulnerability
Cisco · CWE-20 — Improper input validation | CWE-22 — Path traversal · in CISA KEV since 2021-11-03
EVRS 84 of 100 Urgent
Patch This Cycle
Rank 463 of 2,960 tracked
Why it scores 84
Evidence available: 6 of 7 signalsListed in the CISA KEV catalog, and an EPSS probability of 0.999.
- CISA KEVApplied
- RansomwareDid not apply
- Vendor exploitationDid not apply
- EPSSApplied
- Microsoft Exploitability IndexNot applicable
- Pre-patch disclosureNo data
- KEV recencyDid not apply
- CVSSApplied
The band answers “how soon”, not “how bad”. No data for: Pre-patch disclosure. Why some signals show no data
Fix
Patch or fixed version identifiedCISA required action
Fixed in
adaptive security appliance software: update to 9.1.7.29 or later | adaptive security appliance software: update to 9.2.4.33 or later | adaptive security appliance software: update to 9.4.4.18 or later | adaptive security appliance software: update to 9.6.4.8 or later | adaptive security appliance software: update to 9.7.1.24 or later | adaptive security appliance software: update to 9.8.2.28 or later
Affected versions
- firepower threat defense
6.2.3-85.026.2.3-851 - secure firewall threat defense
>= 6.0 < 6.1.0>= 6.2.1 < 6.2.2.36.2.36.2.3.1 - adaptive security appliance software
>= 9.1 < 9.1.7.29>= 9.2 < 9.2.4.33>= 9.3 < 9.4.4.18>= 9.5 < 9.6.4.8>= 9.7 < 9.7.1.24>= 9.8 < 9.8.2.28>= 9.9 < 9.9.2.1
Remediation
Apply updates per vendor instructions.
Fixed versions from NVD.
Evidence
Each value with its source| Measure | Value | Source |
|---|---|---|
| CVSS base scoreHow severe the flaw is in itself. It does not say how likely an attack is. | 7.5 | NVD |
| FIRST EPSSFIRST's estimate of the chance this is exploited in the next 30 days, and how that ranks against all CVEs. | 0.999 (99.97th pctl) | FIRST EPSS |
| Actively exploitedWhether a source of record has confirmed attacks using it in the wild. | Confirmed | CISA KEV |
| Ransomware campaign useWhether CISA has seen ransomware operators use it. | Unknown or none | CISA KEV |
| CISA remediation deadlineThe date US federal agencies must have fixed or mitigated it. | 2022-05-03 · KEV since 2021 · listed over a year | CISA KEV |
| Public exploit moduleA module existing is not the same as active exploitation. | Public module exists | Metasploit |
| EUVD cross-referenceENISA's record: CVSS 7.5 (v3.1), assigned by cisco. | Listed | ENISA EUVD |
Description
NVDA vulnerability in the web interface of the Cisco Adaptive Security Appliance (ASA) could allow an unauthenticated, remote attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS) condition. It is also possible on certain software releases that the ASA will not reload, but an attacker could view sensitive system information without authentication by using directory traversal techniques. The vulnerability is due to lack of proper input validation of the HTTP URL. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected device. An exploit could allow the attacker to cause a DoS condition or unauthenticated disclosure of information. This vulnerability applies to IPv4 and IPv6 HTTP traffic. This vulnerability affects Cisco ASA Software and Cisco Firepower Threat Defense (FTD) Software that is running on the following Cisco products: 3000 Series Industrial Security Appliance (ISA), ASA 1000V Cloud Firewall, ASA 5500 Series Adaptive Security Appliances, ASA 5500-X Series Next-Generation Firewalls, ASA Services Module for Cisco Catalyst 6500 Series Switches and Cisco 7600 Series Routers, Adaptive Security Virtual Appliance (ASAv), Firepower 2100 Series Security Appliance, Firepower 4100 Series Security Appliance, Firepower 9300 ASA Security Module, FTD Virtual (FTDv). Cisco Bug IDs: CSCvi16029.
What CISA says to do
Public module
Metasploit lists a public normal-rank module for this CVE: Cisco ASA Directory Traversal (scanner/http/cisco_directory_traversal). A module existing is not the same as active exploitation; see metasploit.com.