Cisco ASA Authentication HTTP Traffic input validation

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability has been found in Cisco ASA and classified as critical. This impacts an unknown function of the component Authentication. This manipulation as part of HTTP Traffic causes input validation. This vulnerability is tracked as CVE-2018-0296. The attack is possible to be carried out remotely. Moreover, an exploit is present. The affected component should be upgraded.

Detailsinfo

A vulnerability has been found in Cisco ASA (Firewall Software) (the affected version unknown) and classified as critical. Affected by this vulnerability is an unknown part of the component Authentication. The manipulation as part of a HTTP Traffic leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. 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. As an impact it is known to affect confidentiality, and availability. The summary by CVE is:

A 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.

The bug was discovered 06/06/2018. The weakness was disclosed 06/07/2018 by Michal Bentkowski as cisco-sa-20180606-asaftd / CSCvi16029 as confirmed advisory (Website). It is possible to read the advisory at tools.cisco.com. This vulnerability is known as CVE-2018-0296 since 11/27/2017. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are unknown but a public exploit is available.

It is possible to download the exploit at exploit-db.com. It is declared as attacked. We expect the 0-day to have been worth approximately $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 110686 (Cisco ASA Web Services DoS (cisco-sa-20180606-asaftd)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CISCO and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 316269 (Cisco Adaptive Security Appliance Web Services Denial of Service Vulnerability(cisco-sa-20180606-asaftd)). The CISA Known Exploited Vulnerabilities Catalog lists this issue since 11/03/2021 with a due date of 05/03/2022:

Apply updates per vendor instructions.

Upgrading eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Exploit-DB (44956), Tenable (110686) and SecurityFocus (BID 104612†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Attacked
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

KEV Added: 🔍
KEV Due: 🔍
KEV Remediation: 🔍
KEV Ransomware: 🔍
KEV Notice: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 110686
Nessus Name: Cisco ASA Web Services DoS (cisco-sa-20180606-asaftd)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

MetaSploit ID: cisco_directory_traversal.rb
MetaSploit Name: Cisco ASA Directory Traversal
MetaSploit File: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
Suricata ID: 2025764
Suricata Class: 🔍
Suricata Message: 🔍

Timelineinfo

11/27/2017 🔍
06/06/2018 +191 days 🔍
06/06/2018 +0 days 🔍
06/06/2018 +0 days 🔍
06/07/2018 +0 days 🔍
06/07/2018 +0 days 🔍
06/08/2018 +1 days 🔍
06/25/2018 +17 days 🔍
01/27/2025 +2408 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-20180606-asaftd / CSCvi16029
Researcher: Michal Bentkowski
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-0296 (🔍)
GCVE (CVE): GCVE-0-2018-0296
GCVE (VulDB): GCVE-100-119227
SecurityFocus: 104612 - Cisco Adaptive Security Appliance Software CVE-2018-0296 Denial of Service Vulnerability
SecurityTracker: 1041076

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 06/08/2018 08:42
Updated: 01/27/2025 22:39
Changes: 06/08/2018 08:42 (78), 02/17/2020 08:39 (10), 03/22/2023 07:24 (4), 04/19/2024 11:38 (22), 09/09/2024 22:29 (1), 01/27/2025 22:39 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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