CVE-2021-23926 XMLBeans XML Entity Expansion
Attackers can cause denial of service via XML Entity Expansion attacks in Apache XMLBeans due to missing parser protections.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-23926?
CVE-2021-23926 is a critical denial of service vulnerability in Debian Debian Linux, published on 14 Jan 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The XML parsers used by XMLBeans up to version 2.6.0 did not set the properties needed to protect the user from malicious XML input. Vulnerabilities include possibilities for XML Entity Expansion attacks. Affects XMLBeans up to and including v2.6.0.
Weakness: CWE-776
Which versions are affected by CVE-2021-23926?
2 open source packages ship an affected version, including org.apache.xmlbeans:xmlbeans. It affects 7 products.
| Package | Affected | Fixed in |
|---|---|---|
org.apache.xmlbeans:xmlbeans Maven | All versions | 3.0.0 |
org.apache.xmlbeans:xmlbeans Maven | All versions | 3.0.0 |
Linux distribution packages (15)
xmlbeans SUSE:Enterprise Storage 7 | All versions | 2.6.0-150000.5.3.1 |
xmlbeans SUSE:Linux Enterprise High Performance Computing 15 SP2-ESPOS | All versions | 2.6.0-150000.5.3.1 |
xmlbeans SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSS | All versions | 2.6.0-150000.5.3.1 |
xmlbeans SUSE:Linux Enterprise Module for Basesystem 15 SP3 | All versions | 2.6.0-150000.5.3.1 |
xmlbeans SUSE:Linux Enterprise Module for Basesystem 15 SP4 | All versions | 2.6.0-150000.5.3.1 |
xmlbeans SUSE:Linux Enterprise Server 15 SP2-BCL | All versions | 2.6.0-150000.5.3.1 |
xmlbeans SUSE:Linux Enterprise Server 15 SP2-LTSS | All versions | 2.6.0-150000.5.3.1 |
xmlbeans SUSE:Linux Enterprise Server for SAP Applications 15 SP2 | All versions | 2.6.0-150000.5.3.1 |
xmlbeans SUSE:Linux Enterprise Software Development Kit 12 SP5 | All versions | 2.6.0-3.3.1 |
xmlbeans SUSE:Linux Enterprise Workstation Extension 12 SP5 | All versions | 2.6.0-3.3.1 |
xmlbeans SUSE:Manager Proxy 4.1 | All versions | 2.6.0-150000.5.3.1 |
xmlbeans SUSE:Manager Retail Branch Server 4.1 | All versions | 2.6.0-150000.5.3.1 |
xmlbeans SUSE:Manager Server 4.1 | All versions | 2.6.0-150000.5.3.1 |
xmlbeans openSUSE:Leap 15.3 | All versions | 2.6.0-150000.5.3.1 |
xmlbeans openSUSE:Leap 15.4 | All versions | 2.6.0-150000.5.3.1 |
Products include Apache Xmlbeans, Debian Debian Linux, Netapp Oncommand Unified Manager Core Package, Netapp Snap Creator Framework, Netapp Snapmanager, Oracle Middleware Common Libraries and Tools and 1 more.
How do I fix CVE-2021-23926?
Upgrade org.apache.xmlbeans:xmlbeans to 3.0.0 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2021-23926 being exploited?
There is no known exploitation of CVE-2021-23926 in the wild and no public exploit code.
Sources
Also known as CLSA-2026-1770595753, CLSA-2026-1778028243, DEBIAN-CVE-2021-23926, DLA-2693-1, GHSA-mw3r-pfmg-xp92, OESA-2021-1077 and 4 more.