Is CVE-2021-28040 actively exploited?

CVE-2021-28040 has no public evidence of in-the-wild exploitation as of 2024-11-21.

What is the CVSS score for CVE-2021-28040?

CVE-2021-28040 has a CVSS score of 7.5 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

How do I patch CVE-2021-28040?

Patch guidance is available from ossec security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2021-28040.

Fix CVE-2021-28040 - HIGH ossec ossec

Description

An issue was discovered in OSSEC 3.6.0. An uncontrolled recursion vulnerability in os_xml.c occurs when a large number of opening and closing XML tags is used. Because recursion is used in _ReadElem without restriction, an attacker can trigger a segmentation fault once unmapped memory is reached.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: high
Weaknesses: CWE-674

Metadata

Primary Vendor: OSSEC
Published: 3/5/2021
Last Modified: 11/21/2024
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2021-28040

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary