Vulnerability · Published Oct 7, 2021 · Assigned by apache
CVE-2021-40439Billion Laughs
Medium 6.5
In plain English
A medium-severity XML external entity in Apache OpenOffice from Apache Software Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 3.9% (higher than 90% of all known vulnerabilities).
Severity (CVSS NVD)6.5Medium
Exploit odds (30 days)3.9%top 9.8% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Apache Software Foundation | Apache OpenOffice | Apache OpenOffice – through 4.1.10OpenOffice.org – through 3.4 |
Weakness: CWE-611
References
- https://lists.apache.org/thread.html/rfb2c193360436e230b85547e85a41bea0916916f96c501f5b6fc4702%40%3Cusers.openoffice.apache.org%3E x_refsource_MISC
- [announce] 20211007 CVE-2021-40439: Apache OpenOffice: Billion Laughs mailing-list, x_refsource_MLIST
- [oss-security] 20211007 CVE-2021-40439: Apache OpenOffice: Billion Laughs mailing-list, x_refsource_MLIST