CVE-2021-21343
moderate-risk
Published 2021-03-23
XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is a vulnerability where the processed stream at unmarshalling time contains type information to recreate the formerly written objects. XStream creates therefore new instances based on these type information. An attacker can manipulate the processed input stream and replace or inject objects, that result in the deletion of a file on the local host. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. If you rely on XStream's default blacklist of the Security Framework, you will have to use at least version 1.4.16.
Do I need to act?
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0.62% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.3/10
Medium
NETWORK
/ HIGH complexity
Affected Products (20)
References (30)
Release Notes
http://x-stream.github.io/changes.html#1.4.16
Third Party Advisory
https://github.com/x-stream/xstream/security/advisories/GHSA-74cv-f58x-f9wf
Third Party Advisory
https://security.netapp.com/advisory/ntap-20210430-0002/
Mailing List
https://www.debian.org/security/2021/dsa-5004
Third Party Advisory
https://www.oracle.com//security-alerts/cpujul2021.html
Third Party Advisory
https://www.oracle.com/security-alerts/cpuoct2021.html
Release Notes
http://x-stream.github.io/changes.html#1.4.16
Third Party Advisory
https://github.com/x-stream/xstream/security/advisories/GHSA-74cv-f58x-f9wf
and 10 more references
43
/ 100
moderate-risk
Severity
17/34 · Moderate
Exploitability
2/34 · Minimal
Exposure
24/34 · High