Cisco ASA/Firepower Threat Defense SSL/TLS memory corruption

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.
7.8$5k-$25k0.00

Summaryinfo

A vulnerability labeled as critical has been found in Cisco ASA and Firepower Threat Defense. Affected is an unknown function of the component SSL/TLS. The manipulation results in memory corruption. This vulnerability is known as CVE-2021-40117. It is possible to launch the attack remotely. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as critical has been found in Cisco ASA and Firepower Threat Defense (Firewall Software) (the affected version unknown). Affected is an unknown part of the component SSL/TLS. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on availability.

The weakness was published 10/28/2021 as cisco-sa-asaftd-dos-4ygzLKU9. The advisory is shared for download at tools.cisco.com. This vulnerability is traded as CVE-2021-40117 since 08/25/2021. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 07/28/2023).

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: 7.9
VulDB Meta Temp Score: 7.8

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 8.6
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: Memory corruption
CWE: CWE-119
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

08/25/2021 🔍
10/28/2021 +64 days 🔍
10/28/2021 +0 days 🔍
07/28/2023 +638 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-asaftd-dos-4ygzLKU9
Status: Confirmed

CVE: CVE-2021-40117 (🔍)
GCVE (CVE): GCVE-0-2021-40117
GCVE (VulDB): GCVE-100-185580

Entryinfo

Created: 10/28/2021 06:26
Updated: 07/28/2023 15:09
Changes: 10/28/2021 06:26 (49), 11/01/2021 08:29 (1), 11/01/2021 08:34 (18), 07/28/2023 15:09 (2)
Complete: 🔍
Cache ID: 216::103

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