CVE-2021-3516
HIGHCVSS 7.8/10EPSS 1.99%
Last modified
CVE-2021-3516 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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. EPSS estimates a 1.99% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Xmlsoft | Xmllint | < 2.9.11 |
| Debian | Debian Linux | 9.0 |
| Fedoraproject | Fedora | 33 |
| Fedoraproject | Fedora | 34 |
| Redhat | Jboss Core Services | All versions |
| Redhat | Enterprise Linux | 6.0 |
| Redhat | Enterprise Linux | 7.0 |
| Redhat | Enterprise Linux | 8.0 |
| Netapp | Clustered Data Ontap | All versions |
| Netapp | Clustered Data Ontap Antivirus Connector | All versions |
| Netapp | Ontap Select Deploy Administration Utility | All versions |
| Oracle | Zfs Storage Appliance Kit | 8.8 |
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1954225Issue Tracking, Third Party Advisory
- https://gitlab.gnome.org/GNOME/libxml2/-/commit/1358d157d0bd83be1dfe356a69213df9fac0b539Patch, Third Party Advisory
- https://gitlab.gnome.org/GNOME/libxml2/-/issues/230Exploit, Issue Tracking, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/05/msg00008.htmlMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202107-05Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210716-0005/Third Party Advisory
- https://www.oracle.com/security-alerts/cpujan2022.htmlPatch, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1954225Issue Tracking, Third Party Advisory
- https://gitlab.gnome.org/GNOME/libxml2/-/commit/1358d157d0bd83be1dfe356a69213df9fac0b539Patch, Third Party Advisory
- https://gitlab.gnome.org/GNOME/libxml2/-/issues/230Exploit, Issue Tracking, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/05/msg00008.htmlMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202107-05Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210716-0005/Third Party Advisory
- https://www.oracle.com/security-alerts/cpujan2022.htmlPatch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-3516?
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.
How severe is CVE-2021-3516?
CVE-2021-3516 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 1.99% probability of exploitation in the next 30 days.
How do I fix CVE-2021-3516?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2021-3516?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST