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Vulnerability · Published Aug 23, 2021 · Assigned by GitHub_M

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

High 8.5

In plain English

A high-severity unrestricted file upload in xstream from x-stream. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 16.1% (higher than 97% of all known vulnerabilities). Ready-made attack tooling exists: Nuclei, public proof-of-concept code. Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.5High
Exploit odds (30 days)16.1%top 3.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack tooling2Nuclei, Public PoC

Official description

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 packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12libxstream-java1.4.18-1DEBIAN-CVE-2021-39141
Debian:13libxstream-java1.4.18-1DEBIAN-CVE-2021-39141
Debian:14libxstream-java1.4.18-1DEBIAN-CVE-2021-39141
Mavencom.thoughtworks.xstream:xstream1.4.18GHSA-g5w6-mrj7-75h2
Ubuntu:22.04:LTSlibxstream-java1.4.18-2ubuntu0.1USN-5946-1

Affected products (as reported)

VendorProductVersions
x-stream xstream < 1.4.18

Weakness: CWE-434, CWE-502 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

References