CVE-2021-1501: Cisco Adaptive Security Appliance Software and Cisco Firepower Threat Defense Software SIP Denial of Service Vulnerability

Published Apr 29, 2021
·
Updated

A vulnerability in the SIP inspection engine of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a crash and reload of an affected device, resulting in a denial of service (DoS) condition.The vulnerability is due to a crash that occurs during a hash lookup for a SIP pinhole connection. An attacker could exploit this vulnerability by sending crafted SIP traffic through an affected device. A successful exploit could allow the attacker to cause a crash and reload of the affected device.

Affected Software

12 affected components
Cisco Firepower Threat Defense>=6.2.2<6.4.0.12
Cisco Firepower Threat Defense>=6.5.0<6.6.4
Cisco Firepower Threat Defense>=6.7.0<6.7.0.2
Cisco Adaptive Security Appliance Software>=9.8<9.8.4.34
Cisco Adaptive Security Appliance Software>=9.9<9.9.2.85
Cisco Adaptive Security Appliance Software>=9.10<9.12.4.18
Cisco Adaptive Security Appliance Software>=9.13<9.13.1.21
Cisco Adaptive Security Appliance Software>=9.14<9.14.2.13
Cisco Adaptive Security Appliance Software>=9.15<9.15.1.15
Cisco Secure Firewall Threat Defense>=6.2.2<6.4.0.12
Cisco Secure Firewall Threat Defense>=6.5.0<6.6.4
Cisco Secure Firewall Threat Defense>=6.7.0<6.7.0.2

Event History

Apr 29, 2021
CVE Published
via MITRE·05:31 PM
Data Sourced
via MITRE·05:31 PM
DescriptionSeverityWeakness
Data Sourced
via NVD·06:15 PM
DescriptionSeverityWeaknessAffected Software
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Frequently Asked Questions

1

What is the vulnerability ID?

The vulnerability ID is CVE-2021-1501.

2

What is the severity of CVE-2021-1501?

The severity of CVE-2021-1501 is high with a score of 7.5.

3

What is the affected software?

The affected software includes Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software.

4

How does CVE-2021-1501 affect the affected software?

CVE-2021-1501 could allow an unauthenticated, remote attacker to cause a crash and reload of an affected device, resulting in a denial of service (DoS) condition.

5

Is there a fix available for CVE-2021-1501?

Yes, Cisco has released software updates to address this vulnerability. Please refer to the Cisco Security Advisory for more details.

Contact

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