CVEvulnerability

CVE-2020-3259

7.5 HIGH Known exploited Published 2020-05-06 Modified 2026-08-12 Official page ↗

CISA Known Exploited Vulnerability

Cisco ASA and FTD Information Disclosure Vulnerability — Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)

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.

Added to KEV
2024-02-15
Remediation due
2024-03-07
Ransomware use
Known
Required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Notes
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-info-disclose-9eJtycMB; https://nvd.nist.gov/vuln/detail/CVE-2020-3259
Status
Analyzed
Published
2020-05-06
Last modified
2026-08-12
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS 3.0 ([email protected])
7.5 HIGH — CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS 2.0 ([email protected])
5.0 MEDIUM — AV:N/AC:L/Au:N/C:P/I:N/A:N
Weaknesses
CWE-200

Description

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.

Affected configurations

• 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) • 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)

Related

Weakness · CWE (1)

  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor weakness

References