What is the CVSS score of CVE-2021-3520?

CVE-2021-3520 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 3.2%.

Is there a patch available for CVE-2021-3520?

Yes, a patch is available for CVE-2021-3520. Update the affected software to the latest version immediately.

Lz4 CVE-2021-3520

CRITICAL

Integer Overflow or Wraparound (CWE-190)

2021-06-02 secalert@redhat.com

Buffer Overflow Integer Overflow Lz4 Active Iq Unified Manager Cloud Backup Ontap Select Deploy Administration Utility Communications Cloud Native Core Policy Zfs Storage Appliance Kit Universal Forwarder

9.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

CVE Published

Jun 02, 2021 - 13:15 nvd

CRITICAL 9.8

DescriptionNVD

There's a flaw in lz4. An attacker who submits a crafted file to an application linked with lz4 may be able to trigger an integer overflow, leading to calling of memmove() on a negative size argument, causing an out-of-bounds write and/or a crash. The greatest impact of this flaw is to availability, with some potential impact to confidentiality and integrity as well.

AnalysisAI

There's a flaw in lz4. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Integer Overflow vulnerability could allow attackers to cause unexpected behavior through arithmetic overflow.

Technical ContextAI

This vulnerability is classified as Integer Overflow (CWE-190), which allows attackers to cause unexpected behavior through arithmetic overflow. There's a flaw in lz4. An attacker who submits a crafted file to an application linked with lz4 may be able to trigger an integer overflow, leading to calling of memmove() on a negative size argument, causing an out-of-bounds write and/or a crash. The greatest impact of this flaw is to availability, with some potential impact to confidentiality and integrity as well. Affected products include: Lz4 Project Lz4, Netapp Active Iq Unified Manager, Netapp Cloud Backup, Netapp Ontap Select Deploy Administration Utility, Oracle Communications Cloud Native Core Policy.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Validate arithmetic operations, use safe integer libraries, check bounds before allocation.