Cisco ASA/Firepower Threat Defense Network Address Translation security check

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.
5.3$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in Cisco ASA and Firepower Threat Defense. This impacts an unknown function of the component Network Address Translation. The manipulation leads to security check. This vulnerability is traded as CVE-2021-34791. It is possible to initiate the attack remotely. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Cisco ASA and Firepower Threat Defense (Firewall Software) (affected version not known). It has been rated as critical. This issue affects some unknown functionality of the component Network Address Translation. The manipulation with an unknown input leads to a security check vulnerability. Using CWE to declare the problem leads to CWE-358. The product does not implement or incorrectly implements one or more security-relevant checks as specified by the design of a standardized algorithm, protocol, or technique. Impacted is confidentiality, integrity, and availability.

The weakness was shared 10/28/2021 as cisco-sa-natalg-bypass-cpKGqkng. It is possible to read the advisory at tools.cisco.com. The identification of this vulnerability is CVE-2021-34791 since 06/15/2021. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/28/2023). The attack technique deployed by this issue is T1211 according to MITRE ATT&CK.

Upgrading eliminates this vulnerability.

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

Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔍

CNA Base Score: 4.7
CNA Vector (Cisco Systems, Inc.): 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Security check
CWE: CWE-358
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

06/15/2021 🔍
10/28/2021 +135 days 🔍
10/28/2021 +0 days 🔍
07/28/2023 +638 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-natalg-bypass-cpKGqkng
Status: Confirmed

CVE: CVE-2021-34791 (🔍)
GCVE (CVE): GCVE-0-2021-34791
GCVE (VulDB): GCVE-100-185579

Entryinfo

Created: 10/28/2021 06:25
Updated: 07/28/2023 15:09
Changes: 10/28/2021 06:25 (48), 11/01/2021 08:25 (1), 11/01/2021 08:29 (18), 07/28/2023 15:09 (2)
Complete: 🔍
Cache ID: 216::103

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