Debian DSA-4811-1 : libxstream-java - security update

high Nessus Plugin ID 144311
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.


The remote Debian host is missing a security-related update.


It was discovered that the default blacklist of XStream, a Java library to serialise objects to XML and back again, was vulnerable to the execution of arbitrary shell commands by manipulating the processed input stream.

For additional defense-in-depth it is recommended to switch to the whitelist approach of XStream's security framework. For additional information please refer to


Upgrade the libxstream-java packages.

For the stable distribution (buster), this problem has been fixed in version

See Also

Plugin Details

Severity: High

ID: 144311

File Name: debian_DSA-4811.nasl

Version: 1.2

Type: local

Agent: unix

Published: 12/16/2020

Updated: 12/18/2020

Dependencies: ssh_get_info.nasl

Risk Information


Risk Factor: Medium

Score: 6.7


Risk Factor: High

Base Score: 9.3

Temporal Score: 6.9

Vector: AV:N/AC:M/Au:N/C:C/I:C/A:C

Temporal Vector: E:U/RL:OF/RC:C


Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:libxstream-java, cpe:/o:debian:debian_linux:10.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 12/15/2020

Vulnerability Publication Date: 11/16/2020

Reference Information

CVE: CVE-2020-26217

DSA: 4811