CVE-2020-3259: Cisco ASA and FTD Information Disclosure Vulnerability

Published May 6, 2020
·
Updated

A vulnerability in the web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to retrieve memory contents on an affected device, which could lead to the disclosure of confidential information. The vulnerability is due to a buffer tracking issue when the software parses invalid URLs that are requested from the web services interface. An attacker could exploit this vulnerability by sending a crafted GET request to the web services interface. A successful exploit could allow the attacker to retrieve memory contents, which could lead to the disclosure of confidential information. Note: This vulnerability affects only specific AnyConnect and WebVPN configurations. For more information, see the Vulnerable Products section.

Other sources

Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) contain an information disclosure vulnerability. An attacker could retrieve memory contents on an affected device, which could lead to the disclosure of confidential information due to a buffer tracking issue when the software parses invalid URLs that are requested from the web services interface. This vulnerability affects only specific AnyConnect and WebVPN configurations.

CISA

Affected Software

17 affected components
Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)
Cisco AnyConnect SSL VPN=CVE-2020-3259
Cisco Adaptive Security Appliance (ASA) software
Cisco Firepower Threat Defense (FTD) software
Cisco Firepower Threat Defense>=6.2.3<6.2.3.16
Cisco Firepower Threat Defense>=6.3.0<6.3.0.6
Cisco Firepower Threat Defense>=6.4.0<6.4.0.9
Cisco Firepower Threat Defense>=6.5.0<6.5.0.5
Cisco Adaptive Security Appliance Software>=9.8<9.8.4.20
Cisco Adaptive Security Appliance Software>=9.9<9.9.2.67
Cisco Adaptive Security Appliance Software>=9.10<9.10.1.40
Cisco Adaptive Security Appliance Software>=9.12<9.12.3.9
Cisco Adaptive Security Appliance Software>=9.13<9.13.1.10
Cisco Secure Firewall Threat Defense>=6.2.3<6.2.3.16
Cisco Secure Firewall Threat Defense>=6.3.0<6.3.0.6
Cisco Secure Firewall Threat Defense>=6.4.0<6.4.0.9
Cisco Secure Firewall Threat Defense>=6.5.0<6.5.0.5

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Compensating control

    Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Event History

May 6, 2020
CVE Published
via MITRE·04:41 PM
Data Sourced
via MITRE·04:41 PM
DescriptionSeverityWeakness
Data Sourced
via NVD·05:15 PM
DescriptionSeverityWeaknessAffected Software
Jan 31, 2024
News Published
via The Register·05:45 PM
News Published
via The Register·05:47 PM
Feb 2, 2024
News Published
via BleepingComputer·11:33 PM
News Published
via BleepingComputer·11:34 PM
Feb 15, 2024
Known Exploited
via CISA·12:00 AM
Known Ransomware
via CISA·12:00 AM
May 20, 2024
News Published
via The Register·02:28 AM
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Frequently Asked Questions

1

What is CVE-2020-3259?

CVE-2020-3259 is a vulnerability in the web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software.

2

What is the severity of CVE-2020-3259?

CVE-2020-3259 has a severity rating of 7.5 (high).

3

How does CVE-2020-3259 affect Cisco Firepower Threat Defense?

CVE-2020-3259 affects Cisco Firepower Threat Defense versions 6.2.3 to 6.2.3.16, 6.3.0 to 6.3.0.6, 6.4.0 to 6.4.0.9, and 6.5.0 to 6.5.0.5.

4

How does CVE-2020-3259 affect Cisco Adaptive Security Appliance Software?

CVE-2020-3259 affects Cisco Adaptive Security Appliance Software versions 9.8 to 9.8.4.20, 9.9 to 9.9.2.67, 9.10 to 9.10.1.40, 9.12 to 9.12.3.9, and 9.13 to 9.13.1.10.

5

How can I fix CVE-2020-3259?

To fix CVE-2020-3259, it is recommended to apply the necessary security updates provided by Cisco.

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