CVE-2021-21349
high-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 which may allow a remote attacker to request data from internal resources that are not publicly available only by manipulating the processed input stream. 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?
~
6.7% chance of exploitation in next 30 days
EPSS score — moderate 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
6
CVSS 6.1/10
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-f6hm-88x3-mfjv
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-f6hm-88x3-mfjv
and 10 more references
52
/ 100
high-risk
Severity
19/34 · Moderate
Exploitability
9/34 · Low
Exposure
24/34 · High