A Server-Side Forgery Request vulnerability in XStream via HashMap unmarshaling
CVE-2021-39152

8.5HIGH

Key Information:

Vendor

X-stream

Status
Xstream
Vendor
CVE Published:
23 August 2021

What is CVE-2021-39152?

XStream is a simple library to serialize objects to XML and back again. In affected versions this vulnerability may allow a remote attacker to request data from internal resources that are not publicly available only by manipulating the processed input stream with a Java runtime version 14 to 8. 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 1.4.18.

Affected Version(s)

xstream < 1.4.18

References

https://github.com/x-stream/xstream/security/advisories/G...
x_refsource_CONFIRM
https://x-stream.github.io/CVE-2021-39152.html
x_refsource_MISC
https://lists.debian.org/debian-lts-announce/2021/09/msg0...
mailing-listx_refsource_MLIST

EPSS Score

61% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
8.5
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.
CVE-2021-39152 : A Server-Side Forgery Request vulnerability in XStream via HashMap unmarshaling