CVE-2021-40439

Billion Laughs

EPSS 3.4%CWE-611

Vexday Risk Score

3Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS —EPSS 3.4%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

07 Oct 2021Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

Affected products

Apache Software Foundation · Apache OpenOffice

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References

https://lists.apache.org/thread.html/r41eca5f4f09e74436cbb05dec450fc2bef37b5d3e966aa7cc5fada6d%40%3Cannounce.apache.org%3E https://lists.apache.org/thread.html/rfb2c193360436e230b85547e85a41bea0916916f96c501f5b6fc4702%40%3Cusers.openoffice.apache.org%3E http://www.openwall.com/lists/oss-security/2021/10/07/4