XStream is vulnerable to an attack using Regular Expression for a Denial of Service (ReDos)
CVE-2021-21348

7.5HIGH

Key Information:

Vendor

X-stream

Status
Xstream
Vendor
CVE Published:
23 March 2021

What is CVE-2021-21348?

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 occupy a thread that consumes maximum CPU time and will never return. 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.

Affected Version(s)

xstream < 1.4.16

References

https://x-stream.github.io/security.html#workaround
x_refsource_MISC
http://x-stream.github.io/changes.html#1.4.16
x_refsource_MISC
https://github.com/x-stream/xstream/security/advisories/G...
x_refsource_CONFIRM

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.
CVE-2021-21348 : XStream is vulnerable to an attack using Regular Expression for a Denial of Service (ReDos)