Cisco ASA/Firepower Threat Defense TLS Library TLS Message input validation

CVSS Meta Temp Score
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CTI Interest Score
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6.8$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in Cisco ASA and Firepower Threat Defense. This issue affects some unknown processing of the component TLS Library. The manipulation as part of TLS Message results in input validation. This vulnerability was named CVE-2018-0231. The attack may be performed from remote. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Cisco ASA and Firepower Threat Defense (Firewall Software) (the affected version unknown). Affected is an unknown part of the component TLS Library. The manipulation as part of a TLS Message leads to a input validation vulnerability. CWE is classifying the issue as 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. This is going to have an impact on availability. CVE summarizes:

A vulnerability in the Transport Layer Security (TLS) library of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to trigger a reload of the affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a malicious TLS message to an interface enabled for Secure Layer Socket (SSL) services on an affected device. Messages using SSL Version 3 (SSLv3) or SSL Version 2 (SSLv2) cannot be be used to exploit this vulnerability. An exploit could allow the attacker to cause a buffer underflow, triggering a crash on an affected device. This vulnerability affects Cisco ASA Software and Cisco FTD Software that is running on the following Cisco products: Adaptive Security Virtual Appliance (ASAv), Firepower Threat Defense Virtual (FTDv), Firepower 2100 Series Security Appliance. Cisco Bug IDs: CSCve18902, CSCve34335, CSCve38446.

The bug was discovered 04/18/2018. The weakness was presented 04/19/2018 (Website). The advisory is shared for download at securitytracker.com. This vulnerability is traded as CVE-2018-0231 since 11/27/2017. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 109404 (Cisco ASA Multiple Vulnerabilities (cisco-sa-20180418-asa1 / cisco-sa-20180418-asa2 / cisco-sa-20180418-asa3 / cisco-sa-20180418-asaanyconnect / cisco-sa-20180418-asa_inspect)), 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 316240 (Cisco Adaptive Security Appliance TLS Denial of Service Vulnerability (cisco-sa-20180418-asa3)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 2 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (109404). See VDB-116864, VDB-116865, VDB-116866 and VDB-116873 for similar entries. Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.9
VulDB Meta Temp Score: 6.8

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

NVD Base Score: 8.6
NVD Vector: 🔍

CVSSv2info

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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: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 109404
Nessus Name: Cisco ASA Multiple Vulnerabilities (cisco-sa-20180418-asa1 / cisco-sa-20180418-asa2 / cisco-sa-20180418-asa3 / cisco-sa-20180418-asaanyconnect / cisco-sa-20180418-asa_inspect)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Timelineinfo

11/27/2017 🔍
04/18/2018 +142 days 🔍
04/19/2018 +0 days 🔍
04/19/2018 +0 days 🔍
04/21/2018 +2 days 🔍
04/27/2018 +6 days 🔍
04/27/2018 +0 days 🔍
03/03/2023 +1771 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: securitytracker.com⛔
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-0231 (🔍)
GCVE (CVE): GCVE-0-2018-0231
GCVE (VulDB): GCVE-100-116868
SecurityFocus: 103934
SecurityTracker: 1040725

See also: 🔍

Entryinfo

Created: 04/21/2018 16:12
Updated: 03/03/2023 13:59
Changes: 04/21/2018 16:12 (70), 03/30/2020 15:55 (3), 03/03/2023 13:53 (4), 03/03/2023 13:59 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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