XXE in Apache Openoffice
CVE-2021-40439
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.
Vulnerability class: XXE (XML External Entity)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.039 (89.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 90th percentile — 89.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.039 · newest: 0.039 · change: 0.000
Affected products
- Apache Openoffice
- Apache Software Foundation Openoffice — versions Apache OpenOffice, OpenOffice.org
Weakness classification (CWE)
References
- lists.apache.org/thread.html/rfb2c193360436e230b85547e85a41bea0916916f96c501f5b… (Mailing List, Vendor Advisory)
- lists.apache.org/thread.html/r41eca5f4f09e74436cbb05dec450fc2bef37b5d3e966aa7cc… (mailing-list)
- www.openwall.com/lists/oss-security/2021/10/07/4 (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-40439?
- CVE-2021-40439 is a medium-severity vulnerability in Apache Openoffice, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 6.5/10. Published 2021-10-07.
- How severe is CVE-2021-40439?
- Medium severity. CVSS v3 base score is 6.5 out of 10.