Cisco Integrated Services Router Snort Application Detection Engine control flow

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.4$0-$5k0.00

Summaryinfo

A vulnerability has been found in Cisco Integrated Services Router, Industrial Security Appliance, Services Router 1000V, Firepower Threat Defense and Integrated Services Virtual Router and classified as problematic. The impacted element is an unknown function of the component Snort Application Detection Engine. The manipulation leads to control flow. This vulnerability is listed as CVE-2021-1236. The attack may be initiated remotely. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Cisco Integrated Services Router, Industrial Security Appliance, Services Router 1000V, Firepower Threat Defense and Integrated Services Virtual Router (Firewall Software). This issue affects an unknown part of the component Snort Application Detection Engine. The manipulation with an unknown input leads to a control flow vulnerability. Using CWE to declare the problem leads to CWE-670. The code contains a control flow path that does not reflect the algorithm that the path is intended to implement, leading to incorrect behavior any time this path is navigated. Impacted is integrity.

The weakness was presented 01/14/2021 as cisco-sa-snort-app-bypass-cSBYCATq. The advisory is shared at tools.cisco.com. The identification of this vulnerability is CVE-2021-1236. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 02/14/2021).

Upgrading eliminates this vulnerability.

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Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.6
VulDB Meta Temp Score: 4.5

VulDB Base Score: 4.0
VulDB Temp Score: 3.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.3
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: Control flow
CWE: CWE-670
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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

11/13/2020 🔍
01/14/2021 +62 days 🔍
01/14/2021 +0 days 🔍
02/14/2021 +31 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-snort-app-bypass-cSBYCATq
Status: Confirmed

CVE: CVE-2021-1236 (🔍)
GCVE (CVE): GCVE-0-2021-1236
GCVE (VulDB): GCVE-100-167933

Entryinfo

Created: 01/14/2021 12:30
Updated: 02/14/2021 07:57
Changes: 01/14/2021 12:30 (37), 02/14/2021 07:52 (5), 02/14/2021 07:57 (19)
Complete: 🔍
Cache ID: 216::103

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