What is the CVSS score of CVE-2021-3516?

CVE-2021-3516 has a CVSS 3.1 base score of 7.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. EPSS exploitation probability: 2.0%.

Is there a public PoC exploit available for CVE-2021-3516?

Yes, a public proof-of-concept exploit is available for CVE-2021-3516. Prioritise patching immediately. EPSS: 2.0%.

Is there a patch available for CVE-2021-3516?

Yes, a patch is available for CVE-2021-3516. Update the affected software to the latest version immediately.

Xmllint CVE-2021-3516

HIGH

Use After Free (CWE-416)

2021-06-01 secalert@redhat.com

Use After Free Memory Corruption Information Disclosure Xmllint Debian Linux Fedora Jboss Core Services Enterprise Linux Clustered Data Ontap Clustered Data Ontap Antivirus Connector Ontap Select Deploy Administration Utility Zfs Storage Appliance Kit

7.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.8 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

CVE Published

Jun 01, 2021 - 14:15 nvd

HIGH 7.8

DescriptionNVD

There's a flaw in libxml2's xmllint in versions before 2.9.11. An attacker who is able to submit a crafted file to be processed by xmllint could trigger a use-after-free. The greatest impact of this flaw is to confidentiality, integrity, and availability.

AnalysisAI

There's a flaw in libxml2's xmllint in versions before 2.9.11. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity. Public exploit code available.

Technical ContextAI

This vulnerability is classified as Use After Free (CWE-416), which allows attackers to access freed memory to execute arbitrary code or crash the application. There's a flaw in libxml2's xmllint in versions before 2.9.11. An attacker who is able to submit a crafted file to be processed by xmllint could trigger a use-after-free. The greatest impact of this flaw is to confidentiality, integrity, and availability. Affected products include: Xmlsoft Xmllint, Debian Debian Linux, Fedoraproject Fedora, Redhat Jboss Core Services, Redhat Enterprise Linux. Version information: before 2.9.11..

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Use smart pointers or garbage-collected languages. Set pointers to NULL after freeing. Enable memory sanitizers.