CVE-2021-3516

moderate-risk

Published 2021-06-01

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.

Do I need to act?

0.36% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 7.8/10 High

LOCAL / LOW complexity

Affected Products (12)

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

Affected Vendors

Debian Redhat Oracle Xmlsoft Fedoraproject Netapp

References (18)

Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=1954225

Patch https://gitlab.gnome.org/GNOME/libxml2/-/commit/1358d157d0bd83be1dfe356a69213df9...

Exploit https://gitlab.gnome.org/GNOME/libxml2/-/issues/230

Mailing List https://lists.debian.org/debian-lts-announce/2021/05/msg00008.html

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro...

Third Party Advisory https://security.gentoo.org/glsa/202107-05

Third Party Advisory https://security.netapp.com/advisory/ntap-20210716-0005/

Patch https://www.oracle.com/security-alerts/cpujan2022.html

Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=1954225

Patch https://gitlab.gnome.org/GNOME/libxml2/-/commit/1358d157d0bd83be1dfe356a69213df9...

Exploit https://gitlab.gnome.org/GNOME/libxml2/-/issues/230

Mailing List https://lists.debian.org/debian-lts-announce/2021/05/msg00008.html

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro...

Third Party Advisory https://security.gentoo.org/glsa/202107-05

Third Party Advisory https://security.netapp.com/advisory/ntap-20210716-0005/

Patch https://www.oracle.com/security-alerts/cpujan2022.html

/ 100

moderate-risk

Severity 24/34 · High

Exploitability 1/34 · Minimal

Exposure 17/34 · Moderate