Incorrect Calculation Affecting expat package, versions <2.2.0-2+deb9u4
Threat Intelligence
EPSS
1.02% (85th
percentile)
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Test your applications- Snyk ID SNYK-DEBIAN9-EXPAT-2329084
- published 2 Jan 2022
- disclosed 1 Jan 2022
Introduced: 1 Jan 2022
CVE-2021-45960 Open this link in a new tabHow to fix?
Upgrade Debian:9 expat to version 2.2.0-2+deb9u4 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream expat package and not the expat package as distributed by Debian.
See How to fix? for Debian:9 relevant fixed versions and status.
In Expat (aka libexpat) before 2.4.3, a left shift by 29 (or more) places in the storeAtts function in xmlparse.c can lead to realloc misbehavior (e.g., allocating too few bytes, or only freeing memory).
References
- https://security-tracker.debian.org/tracker/CVE-2021-45960
- https://bugzilla.mozilla.org/show_bug.cgi?id=1217609
- https://github.com/libexpat/libexpat/issues/531
- https://github.com/libexpat/libexpat/pull/534
- http://www.openwall.com/lists/oss-security/2022/01/17/3
- https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf
- https://security.gentoo.org/glsa/202209-24
- https://security.netapp.com/advisory/ntap-20220121-0004/
- https://www.debian.org/security/2022/dsa-5073
- https://www.tenable.com/security/tns-2022-05
CVSS Scores
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