CVE-2021-40439

Billion Laughs

Description

Apache OpenOffice has a dependency on expat software. Versions prior to 2.1.0 were subject to CVE-2013-0340 a "Billion Laughs" entity expansion denial of service attack and exploit via crafted XML files. ODF files consist of a set of XML files. All versions of Apache OpenOffice up to 4.1.10 are subject to this issue. expat in version 4.1.11 is patched.

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.46%
Vendor Advisory apache.org
Affected: Apache Software Foundation Apache OpenOffice
Published at:
Updated at:

References

Link Tags
https://lists.apache.org/thread.html/rfb2c193360436e230b85547e85a41bea0916916f96c501f5b6fc4702%40%3Cusers.openoffice.apache.org%3E mailing list vendor advisory
https://lists.apache.org/thread.html/r41eca5f4f09e74436cbb05dec450fc2bef37b5d3e966aa7cc5fada6d%40%3Cannounce.apache.org%3E mailing list
http://www.openwall.com/lists/oss-security/2021/10/07/4 third party advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2021-40439?
CVE-2021-40439 has been scored as a medium severity vulnerability.
How to fix CVE-2021-40439?
To fix CVE-2021-40439, 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-2021-40439 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-40439 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-40439?
CVE-2021-40439 affects Apache Software Foundation Apache OpenOffice.
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