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CISA KEV · Known exploitedHigh

CVE-2020-3259

Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)

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 th...

CVSS
7.5
EPSS
69.3%
99.3% percentile
CISA KEV
Listed
Published
2020.05.07
PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV
Exploit probability69.3%
Technical severityCVSS 7.5

Vulnerability overview

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 th...

Affected product and versions

Product
Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)
Affected versions
6.2.3, 6.3.0, 6.4.0, 6.5.0, 9.8, 9.9, 9.10, 9.12, 9.13, >= 6.2.3 < 6.2.3.16, >= 6.3.0 < 6.3.0.6, >= 6.4.0 < 6.4.0.9, >= 6.5.0 < 6.5.0.5, >= 9.8 < 9.8.4.20, >= 9.9 < 9.9.2.67, >= 9.10 < 9.10.1.40, >= 9.12 < 9.12.3.9, >= 9.13 < 9.13.1.10
Fixed versions
6.2.3.16, 6.3.0.6, 6.4.0.9, 6.5.0.5, 9.8.4.20, 9.9.2.67, 9.10.1.40, 9.12.3.9, 9.13.1.10

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
CISA required action

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

Due date: 2024.03.07
  1. 1
    Identify

    Confirm that Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE
CWE-200
KEV added
2024.02.15
Ransomware use
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CVE-2020-3259 — Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) | SECUFOCUS NOW