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Vulnerability · Published Mar 22, 2021 · Assigned by GitHub_M

CVE-2021-21350XStream is vulnerable to an Arbitrary Code Execution attack

Medium 5.3

In plain English

A medium-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 15.2% (higher than 97% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)15.2%top 3.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is a vulnerability which may allow a remote attacker to execute arbitrary code 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. If you rely on XStream's default blacklist of the Security Framework, you will have to use at least version 1.4.16.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12libxstream-java1.4.15-2DEBIAN-CVE-2021-21350
Debian:13libxstream-java1.4.15-2DEBIAN-CVE-2021-21350
Debian:14libxstream-java1.4.15-2DEBIAN-CVE-2021-21350
Mavencom.thoughtworks.xstream:xstream1.4.16GHSA-43gc-mjxg-gvrq

Affected products (as reported)

VendorProductVersions
x-stream xstream < 1.4.16

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

References