Cisco Firepower Threat Defense Software HTTP Header Parameter protection mechanism

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Cisco Firepower Threat Defense Software and UTD SNORT IPS Engine Software. The affected element is an unknown function of the component HTTP Header Parameter Handler. This manipulation causes protection mechanism. This vulnerability is registered as CVE-2021-1494. Remote exploitation of the attack is possible. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Cisco Firepower Threat Defense Software and UTD SNORT IPS Engine Software (the affected version is unknown). It has been declared as problematic. Affected by this vulnerability is an unknown code of the component HTTP Header Parameter Handler. The manipulation with an unknown input leads to a protection mechanism vulnerability. The CWE definition for the vulnerability is CWE-693. The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product. As an impact it is known to affect integrity. The summary by CVE is:

Multiple Cisco products are affected by a vulnerability in the Snort detection engine that could allow an unauthenticated, remote attacker to bypass a configured file policy for HTTP. The vulnerability is due to incorrect handling of specific HTTP header parameters. An attacker could exploit this vulnerability by sending crafted HTTP packets through an affected device. A successful exploit could allow the attacker to bypass a configured file policy for HTTP packets and deliver a malicious payload.

The advisory is shared at sec.cloudapps.cisco.com. This vulnerability is known as CVE-2021-1494 since 11/13/2020. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. 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 11/15/2024).

Upgrading eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

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

CNA Base Score: 5.8
CNA Vector (cisco): 🔍

CVSSv2info

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

Exploitinginfo

Class: Protection mechanism
CWE: CWE-693
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 🔍
11/15/2024 +1463 days 🔍
11/15/2024 +0 days 🔍
11/15/2024 +0 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-http-fp-bp-KfDdcQhc
Status: Confirmed

CVE: CVE-2021-1494 (🔍)
GCVE (CVE): GCVE-0-2021-1494
GCVE (VulDB): GCVE-100-284785

Entryinfo

Created: 11/15/2024 19:02
Changes: 11/15/2024 19:02 (63)
Complete: 🔍
Cache ID: 216::103

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