CVE-2021-46143

moderate-risk
Published 2022-01-06

In doProlog in xmlparse.c in Expat (aka libexpat) before 2.4.3, an integer overflow exists for m_groupSize.

Do I need to act?

~
4.1% chance of exploitation in next 30 days
EPSS score — moderate 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
8
CVSS 8.1/10 High
NETWORK / HIGH complexity

Affected Products (10)

Affected Vendors

Siemens Netapp Libexpat Project Tenable

References (16)

Mailing List http://www.openwall.com/lists/oss-security/2022/01/17/3
Patch https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf
Exploit https://github.com/libexpat/libexpat/issues/532
Patch https://github.com/libexpat/libexpat/pull/538
Third Party Advisory https://security.gentoo.org/glsa/202209-24
Third Party Advisory https://security.netapp.com/advisory/ntap-20220121-0006/
Third Party Advisory https://www.debian.org/security/2022/dsa-5073
Third Party Advisory https://www.tenable.com/security/tns-2022-05
Mailing List http://www.openwall.com/lists/oss-security/2022/01/17/3
Patch https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf
Exploit https://github.com/libexpat/libexpat/issues/532
Patch https://github.com/libexpat/libexpat/pull/538
Third Party Advisory https://security.gentoo.org/glsa/202209-24
Third Party Advisory https://security.netapp.com/advisory/ntap-20220121-0006/
Third Party Advisory https://www.debian.org/security/2022/dsa-5073
Third Party Advisory https://www.tenable.com/security/tns-2022-05
47
/ 100
moderate-risk
Severity 24/34 · High
Exploitability 7/34 · Low
Exposure 16/34 · Moderate