CVE-2021-45960

Public Exploit

Description

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).

Category

8.8
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.27%
Vendor Advisory debian.org Vendor Advisory gentoo.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/libexpat/libexpat/issues/531 issue tracking patch exploit third party advisory
https://github.com/libexpat/libexpat/pull/534 third party advisory patch
https://bugzilla.mozilla.org/show_bug.cgi?id=1217609 issue tracking permissions required third party advisory
http://www.openwall.com/lists/oss-security/2022/01/17/3 mailing list exploit third party advisory
https://security.netapp.com/advisory/ntap-20220121-0004/ third party advisory
https://www.tenable.com/security/tns-2022-05 third party advisory
https://www.debian.org/security/2022/dsa-5073 issue tracking third party advisory vendor advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf third party advisory patch
https://security.gentoo.org/glsa/202209-24 third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-45960?
CVE-2021-45960 has been scored as a high severity vulnerability.
How to fix CVE-2021-45960?
To fix CVE-2021-45960, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-45960 being actively exploited in the wild?
It is possible that CVE-2021-45960 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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