Cisco Adaptive Security Appliance TLS uninitialized variable

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.9$0-$5k0.00

Summaryinfo

A vulnerability was found in Cisco Adaptive Security Appliance and classified as critical. This vulnerability affects unknown code of the component TLS Handler. Such manipulation leads to uninitialized variable. This vulnerability is uniquely identified as CVE-2020-27124. The attack can be launched remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Cisco Adaptive Security Appliance (the affected version is unknown). It has been rated as critical. Affected by this issue is an unknown code of the component TLS Handler. The manipulation with an unknown input leads to a uninitialized variable vulnerability. Using CWE to declare the problem leads to CWE-457. The code uses a variable that has not been initialized, leading to unpredictable or unintended results. Impacted is availability. CVE summarizes:

A vulnerability in the SSL/TLS handler of Cisco Adaptive Security Appliance (ASA) Software could allow an unauthenticated, remote attacker to cause the affected device to reload unexpectedly, leading to a denial of service (DoS) condition. The vulnerability is due to improper error handling on established SSL/TLS connections. An attacker could exploit this vulnerability by establishing an SSL/TLS connection with the affected device and then sending a malicious SSL/TLS message within that connection. A successful exploit could allow the attacker to cause the device to reload.Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

The advisory is available at sec.cloudapps.cisco.com. This vulnerability is handled as CVE-2020-27124 since 10/13/2020. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 08/01/2025).

Upgrading eliminates this vulnerability.

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Productinfo

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.0
VulDB Meta Temp Score: 7.9

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

CNA Base Score: 8.6
CNA Vector (cisco): 🔍

CVSSv2info

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

Exploitinginfo

Class: Uninitialized variable
CWE: CWE-457 / CWE-453
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

10/13/2020 🔍
11/18/2024 +1497 days 🔍
11/18/2024 +0 days 🔍
08/01/2025 +256 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-asa-ssl-dos-7uZWwSEy
Status: Confirmed

CVE: CVE-2020-27124 (🔍)
GCVE (CVE): GCVE-0-2020-27124
GCVE (VulDB): GCVE-100-285002

Entryinfo

Created: 11/18/2024 17:41
Updated: 08/01/2025 21:13
Changes: 11/18/2024 17:41 (62), 08/01/2025 21:13 (1)
Complete: 🔍
Cache ID: 216::103

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