CVE-2021-46143
HIGHCVSS 7.8/10EPSS 3.76%
Last modified
CVE-2021-46143 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. In doProlog in xmlparse.c in Expat (aka libexpat) before 2.4.3, an integer overflow exists for m_groupSize.. EPSS estimates a 3.76% chance of exploitation in the next 30 days.
Description
In doProlog in xmlparse.c in Expat (aka libexpat) before 2.4.3, an integer overflow exists for m_groupSize.
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 |
|---|---|---|
| Libexpat Project | Libexpat | < 2.4.3 |
| Netapp | Active Iq Unified Manager | All versions |
| Netapp | Clustered Data Ontap | All versions |
| Netapp | Hci Baseboard Management Controller | h610c |
| Netapp | Hci Baseboard Management Controller | h610s |
| Netapp | Hci Baseboard Management Controller | h615c |
| Netapp | Oncommand Workflow Automation | All versions |
| Netapp | Solidfire \& Hci Management Node | All versions |
| Tenable | Nessus | < 8.15.3 |
| Tenable | Nessus | >= 10.0.0, < 10.1.1 |
| Siemens | Sinema Remote Connect Server | < 3.1 |
References
- http://www.openwall.com/lists/oss-security/2022/01/17/3Mailing List, Patch, Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdfPatch, Third Party Advisory
- https://github.com/libexpat/libexpat/issues/532Exploit, Issue Tracking, Patch, Third Party Advisory
- https://github.com/libexpat/libexpat/pull/538Patch, Third Party Advisory
- https://security.gentoo.org/glsa/202209-24Third Party Advisory
- https://security.netapp.com/advisory/ntap-20220121-0006/Third Party Advisory
- https://www.debian.org/security/2022/dsa-5073Third Party Advisory
- https://www.tenable.com/security/tns-2022-05Third Party Advisory
- http://www.openwall.com/lists/oss-security/2022/01/17/3Mailing List, Patch, Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdfPatch, Third Party Advisory
- https://github.com/libexpat/libexpat/issues/532Exploit, Issue Tracking, Patch, Third Party Advisory
- https://github.com/libexpat/libexpat/pull/538Patch, Third Party Advisory
- https://security.gentoo.org/glsa/202209-24Third Party Advisory
- https://security.netapp.com/advisory/ntap-20220121-0006/Third Party Advisory
- https://www.debian.org/security/2022/dsa-5073Third Party Advisory
- https://www.tenable.com/security/tns-2022-05Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-46143?
In doProlog in xmlparse.c in Expat (aka libexpat) before 2.4.3, an integer overflow exists for m_groupSize.
How severe is CVE-2021-46143?
CVE-2021-46143 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 3.76% probability of exploitation in the next 30 days.
How do I fix CVE-2021-46143?
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.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-46143?
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