CVE-2021-39140
moderate-risk
Published 2021-08-23
XStream is a simple library to serialize objects to XML and back again. In affected versions this vulnerability may allow a remote attacker to allocate 100% CPU time on the target system depending on CPU type or parallel execution of such a payload resulting in a denial of service 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. XStream 1.4.18 uses no longer a blacklist by default, since it cannot be secured for general purpose.
Do I need to act?
-
0.14% 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
6
CVSS 6.5/10
Medium
NETWORK
/ LOW complexity
Affected Products (20)
Affected Vendors
References (22)
Third Party Advisory
https://github.com/x-stream/xstream/security/advisories/GHSA-6wf9-jmg9-vxcc
Third Party Advisory
https://security.netapp.com/advisory/ntap-20210923-0003/
Third Party Advisory
https://www.debian.org/security/2021/dsa-5004
Third Party Advisory
https://github.com/x-stream/xstream/security/advisories/GHSA-6wf9-jmg9-vxcc
Third Party Advisory
https://security.netapp.com/advisory/ntap-20210923-0003/
Third Party Advisory
https://www.debian.org/security/2021/dsa-5004
and 2 more references
48
/ 100
moderate-risk
Severity
24/34 · High
Exploitability
1/34 · Minimal
Exposure
23/34 · High