What is the CVSS score of CVE-2021-39139?

CVE-2021-39139 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 4.5%.

Is there a patch available for CVE-2021-39139?

Yes, a patch is available for CVE-2021-39139. Update the affected software to the latest version immediately.

Java CVE-2021-39139

HIGH

Unrestricted Upload of File with Dangerous Type (CWE-434)

2021-08-23 security-advisories@github.com

RCE File Upload Java Xstream Debian Linux Fedora Snapmanager Business Activity Monitoring Commerce Guided Search Communications Billing And Revenue Management Elastic Charging Engine Communications Cloud Native Core Automated Test Suite Communications Cloud Native Core Binding Support Function Communications Cloud Native Core Policy Communications Unified Inventory Management Retail Xstore Point Of Service Utilities Framework Utilities Testing Accelerator Webcenter Portal

8.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

8.8 HIGH

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

CVE Published

Aug 23, 2021 - 18:15 nvd

HIGH 8.8

Blast Radius

ecosystem impact

† from your stack dependencies † transitive graph · vuln.today resolves 4-path depth

1,776 maven packages depend on com.thoughtworks.xstream:xstream (204 direct, 1,575 indirect)

Ecosystem-wide dependent count for version 1.4.18.

DescriptionNVD

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. A user is only affected if using the version out of the box with JDK 1.7u21 or below. However, this scenario can be adjusted easily to an external Xalan that works regardless of the version of the Java runtime. 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.

AnalysisAI

XStream is a simple library to serialize objects to XML and back again. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. This Unrestricted File Upload vulnerability could allow attackers to upload malicious files that can be executed on the server.

Technical ContextAI

This vulnerability is classified as Unrestricted File Upload (CWE-434), which allows attackers to upload malicious files that can be executed on the server. 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. A user is only affected if using the version out of the box with JDK 1.7u21 or below. However, this scenario can be adjusted easily to an external Xalan that works regardless of the version of the Java runtime. 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 products include: Xstream, Debian Debian Linux, Fedoraproject Fedora, Netapp Snapmanager, Oracle Business Activity Monitoring.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Validate file types server-side, store uploads outside webroot, use random filenames, scan for malware.