Remote Code Execution in XStream
CVE-2020-26217

8HIGH

Key Information:

Vendor

X-stream

Status
Xstream
Vendor
CVE Published:
16 November 2020

Badges

👾 Exploit Exists🟡 Public PoC🟣 EPSS 93%

What is CVE-2020-26217?

XStream before version 1.4.14 is vulnerable to Remote Code Execution.The vulnerability may allow a remote attacker to run arbitrary shell commands only by manipulating the processed input stream. Only users who rely on blocklists are affected. Anyone using XStream's Security Framework allowlist is not affected. The linked advisory provides code workarounds for users who cannot upgrade. The issue is fixed in version 1.4.14.

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Affected Version(s)

xstream < 1.4.14

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.

CVE-2020-26217-XStream-RCE-POC
Created by novysodope

CVE-2020-26217
Created by Al1ex

References

https://github.com/x-stream/xstream/security/advisories/G...
x_refsource_CONFIRM
https://x-stream.github.io/CVE-2020-26217.html
x_refsource_CONFIRM
https://github.com/x-stream/xstream/commit/0fec095d534126...
x_refsource_CONFIRM

EPSS Score

93% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
Required
Scope:
Changed

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

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