CVE-2020-17534 Improper synchronization in Apache Netbeans HTML/Java API
A race condition in the webkit subproject allows local attackers to escalate privileges by exploiting temporary file handling flaws.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-17534?
CVE-2020-17534 is a high-severity vulnerability in Apache NetBeans HTML/Java API, published on 11 Jan 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
There exists a race condition between the deletion of the temporary file and the creation of the temporary directory in `webkit` subproject of HTML/Java API version 1.7. A similar vulnerability has recently been disclosed in other Java projects and the fix in HTML/Java API version 1.7.1 follows theirs: To avoid local privilege escalation version 1.7.1 creates the temporary directory atomically without dealing with the temporary file: https://github.com/apache/netbeans-html4j/commit/fa70e507e5555e1adb4f6518479fc408a7abd0e6
Weakness: CWE-362
Which versions are affected by CVE-2020-17534?
2 open source packages ship an affected version, including org.netbeans.html:pom. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
org.netbeans.html:pom Maven | All versions | 1.7.1 |
org.netbeans.html:pom Maven | All versions | 1.7.1 |
Products include Apache Html\/Java Api.
How do I fix CVE-2020-17534?
Upgrade org.netbeans.html:pom to 1.7.1 or later.
Is CVE-2020-17534 being exploited?
There is no known exploitation of CVE-2020-17534 in the wild and no public exploit code.
Sources
Also known as GHSA-ppc3-fpvh-7396, UBUNTU-CVE-2020-17534.