XStream is vulnerable to an Arbitrary Code Execution attack
CVE-2021-39141

8.5HIGH

Key Information:

Vendor

X-stream

Status
Xstream
Vendor
CVE Published:
23 August 2021

Badges

👾 Exploit Exists🟡 Public PoC🟣 EPSS 75%

What is CVE-2021-39141?

XStream is a simple library to serialize objects to XML and back again. In affected versions this vulnerability may allow a remote attacker to load and execute arbitrary code from a remote host 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.

Affected Version(s)

xstream < 1.4.18

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

Xstream-1.4.17
Created by zwjjustdoit

References

https://github.com/x-stream/xstream/security/advisories/G...
x_refsource_CONFIRM
https://x-stream.github.io/CVE-2021-39141.html
x_refsource_MISC
https://lists.debian.org/debian-lts-announce/2021/09/msg0...
mailing-listx_refsource_MLIST

EPSS Score

75% 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

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.
CVE-2021-39141 : XStream is vulnerable to an Arbitrary Code Execution attack