ESB-2021.0328 – [Ubuntu] XStream: Multiple vulnerabilities

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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2021.0328
                    USN-4714-1: XStream vulnerabilities
                              29 January 2021

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           XStream
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Execute Arbitrary Code/Commands -- Existing Account      
                   Delete Arbitrary Files          -- Remote/Unauthenticated
                   Access Confidential Data        -- Existing Account      
Resolution:        Patch/Upgrade
CVE Names:         CVE-2020-26259 CVE-2020-26258 CVE-2020-26217

Reference:         ESB-2021.0254
                   ESB-2021.0210
                   ESB-2021.0131
                   ESB-2020.4241

Original Bulletin: 
   https://ubuntu.com/security/notices/USN-4714-1

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USN-4714-1: XStream vulnerabilities
28 January 2021

Several security issues were fixed in libxstream-java.
Releases

  o Ubuntu 20.04 LTS
  o Ubuntu 18.04 LTS

Packages

  o libxstream-java - Java library to serialize objects to XML and back again

Details

Zhihong Tian and Hui Lu found that XStream was vulnerable to remote code
execution. A remote attacker could run arbitrary shell commands by
manipulating the processed input stream. ( CVE-2020-26217 )

It was discovered that XStream was vulnerable to server-side forgery attacks.
A remote attacker could request data from internal resources that are not
publicly available only by manipulating the processed input stream.
( CVE-2020-26258 )

It was discovered that XStream was vulnerable to arbitrary file deletion on
the local host. A remote attacker could use this to delete arbitrary known
files on the host as long as the executing process had sufficient rights only
by manipulating the processed input stream. ( CVE-2020-26259 )

Update instructions

The problem can be corrected by updating your system to the following package
versions:

Ubuntu 20.04

  o libxstream-java - 1.4.11.1-1ubuntu0.1

Ubuntu 18.04

  o libxstream-java - 1.4.11.1-1~18.04.1

In general, a standard system update will make all the necessary changes.

References

  o CVE-2020-26217
  o CVE-2020-26259
  o CVE-2020-26258

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===========================================================================
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