⚠ Actively exploited in ransomware campaigns
This vulnerability is on the CISA Known Exploited Vulnerabilities list and has been used in known ransomware attacks. CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.. Due date: 2024-03-07.

CVE-2020-3259Sensitive Information Exposure in Cisco Adaptive Security Appliance Software

Severity
7.5HIGHNVD
EPSS
69.7%
top 1.33%
CISA KEV
KEVRansomware
Added 2024-02-15
Due 2024-03-07
Exploit
Exploited in wild
Active exploitation observed
Timeline
PublishedMay 6
KEV addedFeb 15
KEV dueMar 7
Latest updateMar 7
CISA Required Action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

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

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NExploitability: 3.9 | Impact: 3.6

Affected Packages3 packages

🔴Vulnerability Details

3
GHSA
GHSA-vw99-pf8w-g3cw: A vulnerability in the web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software co2022-05-24
CVEList
Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Services Information Disclosure Vulnerability2020-05-06
VulnCheck
Cisco ASA and FTD Information Disclosure Vulnerability2020

🔍Detection Rules

1
Suricata
ET WEB_SPECIFIC_APPS Cisco ASA/FTD Memory Leak Attempt (CVE-2020-3259)2025-03-07

📋Vendor Advisories

2
CISA
Cisco ASA and FTD Information Disclosure Vulnerability2024-02-15
Cisco
Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Services Information Disclosure Vulnerability2020-05-06

🕵️Threat Intelligence

2
Unit42
Threat Assessment: Howling Scorpius (Akira Ransomware)2024-12-02
Huntress
CVE-2020-3259 Vulnerability: Analysis, Impact, Mitigation | Huntress
CVE-2020-3259 — Sensitive Information Exposure in Cisco | cvebase