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Ubuntu Security Notice USN-4714-1

Ubuntu Security Notice USN-4714-1
Posted Jan 29, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4714-1 - 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. 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. Various other issues were also addressed.

tags | advisory, remote, arbitrary, shell, code execution
systems | linux, ubuntu
advisories | CVE-2020-26217, CVE-2020-26258, CVE-2020-26259
MD5 | 3cdeed73f8b46410b7481e928cd50ec1

Ubuntu Security Notice USN-4714-1

Change Mirror Download
=========================================================================
Ubuntu Security Notice USN-4714-1
January 28, 2021

libxstream-java vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in libxstream-java.

Software Description:
- 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 LTS:
libxstream-java 1.4.11.1-1ubuntu0.1

Ubuntu 18.04 LTS:
libxstream-java 1.4.11.1-1~18.04.1

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

References:
https://usn.ubuntu.com/4714-1
CVE-2020-26217, CVE-2020-26258, CVE-2020-26259

Package Information:
https://launchpad.net/ubuntu/+source/libxstream-java/1.4.11.1-1ubuntu0.1
https://launchpad.net/ubuntu/+source/libxstream-java/1.4.11.1-1~18.04.1
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