Vulnerability Description
XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.15, is vulnerable to an Arbitrary File Deletion on the local host when unmarshalling. The vulnerability may allow a remote attacker to delete arbitrary know files on the host as log as the executing process has sufficient rights only by manipulating the processed input stream. If you rely on XStream's default blacklist of the Security Framework, you will have to use at least version 1.4.15. The reported vulnerability does not exist running Java 15 or higher. No user is affected, who followed the recommendation to setup XStream's Security Framework with a whitelist! Anyone relying on XStream's default blacklist can immediately switch to a whilelist for the allowed types to avoid the vulnerability. Users of XStream 1.4.14 or below who still want to use XStream default blacklist can use a workaround described in more detailed in the referenced advisories.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Apache | Struts | < 6.0.0 |
| Xstream | Xstream | < 1.4.15 |
| Debian | Debian Linux | 9.0 |
| Fedoraproject | Fedora | 33 |
Related Weaknesses (CWE)
References
- https://github.com/x-stream/xstream/security/advisories/GHSA-jfvx-7wrx-43fhMitigationThird Party Advisory
- https://lists.apache.org/thread.html/r97993e3d78e1f5389b7b172ba9f308440830ce5f05Issue TrackingMailing List
- https://lists.debian.org/debian-lts-announce/2020/12/msg00042.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproMailing List
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproMailing List
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproMailing List
- https://security.netapp.com/advisory/ntap-20210409-0005/Third Party Advisory
- https://www.debian.org/security/2021/dsa-4828Third Party Advisory
- https://x-stream.github.io/CVE-2020-26259.htmlExploitMitigationThird Party Advisory
- https://github.com/x-stream/xstream/security/advisories/GHSA-jfvx-7wrx-43fhMitigationThird Party Advisory
- https://lists.apache.org/thread.html/r97993e3d78e1f5389b7b172ba9f308440830ce5f05Issue TrackingMailing List
- https://lists.debian.org/debian-lts-announce/2020/12/msg00042.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproMailing List
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproMailing List
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproMailing List
FAQ
What is CVE-2020-26259?
CVE-2020-26259 is a vulnerability with a CVSS score of 6.8 (MEDIUM). XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.15, is vulnerable to an Arbitrary File Deletion on the local host when unmarshalling. The vulnerabil...
How severe is CVE-2020-26259?
CVE-2020-26259 has been rated MEDIUM with a CVSS base score of 6.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-26259?
Check the references section above for vendor advisories and patch information. Affected products include: Apache Struts, Xstream Xstream, Debian Debian Linux, Fedoraproject Fedora.