XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is vulnerability which may allow a remote attacker to allocate 100% CPU time on the target system depending on CPU type or parallel execution of such a payload resulting in a denial of service 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.

The remote Ubuntu 14.04 LTS / 16.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-6978-1 advisory.

    It was discovered that XStream incorrectly handled parsing of certain crafted XML documents. A remote     attacker could possibly use this issue to read arbitrary files. (CVE-2016-3674)

    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)

    It was discovered that XStream was vulnerable to denial of service, arbitrary code execution, arbitrary     file deletion and server-side forgery attacks. A remote attacker could cause any of those issues by     manipulating the processed input stream. (CVE-2021-21341, CVE-2021-21342, CVE-2021-21343, CVE-2021-21344,     CVE-2021-21345, CVE-2021-21346, CVE-2021-21347, CVE-2021-21348, CVE-2021-21349, CVE-2021-21350,     CVE-2021-21351)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 10 / 11 host has a package installed that is affected by multiple vulnerabilities as referenced in the dsa-5004 advisory.

    Multiple security vulnerabilities have been discovered in XStream, a Java library to serialize objects to     XML and back again. These vulnerabilities may allow a remote attacker to load and execute arbitrary code     from a remote host only by manipulating the processed input stream. XStream itself sets up a whitelist by     default now, i.e. it blocks all classes except those types it has explicit converters for. It used to have     a blacklist by default, i.e. it tried to block all currently known critical classes of the Java runtime.
    Main reason for the blacklist were compatibility, it allowed to use newer versions of XStream as drop-in     replacement. However, this approach has failed. A growing list of security reports has proven, that a     blacklist is inherently unsafe, apart from the fact that types of 3rd libraries were not even considered.
    A blacklist scenario should be avoided in general, because it provides a false sense of security. For the     oldstable distribution (buster), these problems have been fixed in version 1.4.11.1-1+deb10u3. For the     stable distribution (bullseye), these problems have been fixed in version 1.4.15-3+deb11u1. We recommend     that you upgrade your libxstream-java packages. For the detailed security status of libxstream-java please     refer to its security tracker page at: https://security-tracker.debian.org/tracker/libxstream-java

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SUSE15 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2021:1840-1 advisory.

  - XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16,     there is vulnerability which may allow a remote attacker to allocate 100% CPU time on the target system     depending on CPU type or parallel execution of such a payload resulting in a denial of service 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.
    (CVE-2021-21341)

  - XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16,     there is a vulnerability where the processed stream at unmarshalling time contains type information to     recreate the formerly written objects. XStream creates therefore new instances based on these type     information. An attacker can manipulate the processed input stream and replace or inject objects, that     result in a server-side forgery request. 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.
    (CVE-2021-21342)

  - XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16,     there is a vulnerability where the processed stream at unmarshalling time contains type information to     recreate the formerly written objects. XStream creates therefore new instances based on these type     information. An attacker can manipulate the processed input stream and replace or inject objects, that     result in the deletion of a file on the local host. 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.
    (CVE-2021-21343)

  - 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 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. If you rely on XStream's default blacklist of the Security Framework, you will have to use at least     version 1.4.16. (CVE-2021-21344, CVE-2021-21346, CVE-2021-21347)

  - 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 who has sufficient rights to execute commands     of the 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. If you rely on XStream's default blacklist of the Security Framework, you will have to use at least     version 1.4.16. (CVE-2021-21345)

  - 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 occupy a thread that consumes maximum CPU     time and will never return. 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.
    (CVE-2021-21348)

  - 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 request data from internal resources that     are not publicly available 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. (CVE-2021-21349)

  - 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.
    (CVE-2021-21350)

  - XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16,     there is a 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. If you rely on     XStream's default blacklist of the Security Framework, you will have to use at least version 1.4.16.
    (CVE-2021-21351)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

This update for xstream fixes the following issues :

  - Upgrade to 1.4.16

  - CVE-2021-21351: remote attacker to load and execute     arbitrary code (bsc#1184796)

  - CVE-2021-21349: SSRF can lead to a remote attacker to     request data from internal resources (bsc#1184797)

  - CVE-2021-21350: arbitrary code execution (bsc#1184380)

  - CVE-2021-21348: remote attacker could cause denial of     service by consuming maximum CPU time (bsc#1184374)

  - CVE-2021-21347: remote attacker to load and execute     arbitrary code from a remote host (bsc#1184378)

  - CVE-2021-21344: remote attacker could load and execute     arbitrary code from a remote host (bsc#1184375)

  - CVE-2021-21342: server-side forgery (bsc#1184379)

  - CVE-2021-21341: remote attacker could cause a denial of     service by allocating 100% CPU time (bsc#1184377)

  - CVE-2021-21346: remote attacker could load and execute     arbitrary code (bsc#1184373)

  - CVE-2021-21345: remote attacker with sufficient rights     could execute commands (bsc#1184372)

  - CVE-2021-21343: replace or inject objects, that result     in the deletion of files on the local host (bsc#1184376)

This update was imported from the SUSE:SLE-15-SP2:Update update project.

The version of xstream installed on the remote host is prior to 1.3.1-13. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2021-1645 advisory.

    2024-01-03: CVE-2021-21351 was added to this advisory.

    2024-01-03: CVE-2021-21341 was added to this advisory.

    2024-01-03: CVE-2021-21349 was added to this advisory.

    2024-01-03: CVE-2021-21348 was added to this advisory.

    2024-01-03: CVE-2021-21343 was added to this advisory.

    XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16,     there is vulnerability which may allow a remote attacker to allocate 100% CPU time on the target system     depending on CPU type or parallel execution of such a payload resulting in a denial of service 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.
    (CVE-2021-21341)

    XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16,     there is a vulnerability where the processed stream at unmarshalling time contains type information to     recreate the formerly written objects. XStream creates therefore new instances based on these type     information. An attacker can manipulate the processed input stream and replace or inject objects, that     result in the deletion of a file on the local host. 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.
    (CVE-2021-21343)

    A flaw was found in xstream. A remote attacker may be able to load and execute arbitrary code from a     remote host only by manipulating the processed input stream. The highest threat from this vulnerability is     to data confidentiality and integrity as well as system availability. (CVE-2021-21344)

    A flaw was found in xstream. A remote attacker, who has sufficient rights, can execute commands of the     host by manipulating the processed input stream. The highest threat from this vulnerability is to data     confidentiality and integrity as well as system availability. (CVE-2021-21345)

    A flaw was found in xstream. A remote attacker can load and execute arbitrary code from a remote host by     manipulating the processed input stream. The highest threat from this vulnerability is to data     confidentiality and integrity as well as system availability. (CVE-2021-21346)

    A flaw was found in xstream. A remote attacker may be able to load and execute arbitrary code from a     remote host only by manipulating the processed input stream. The highest threat from this vulnerability is     to data confidentiality and integrity as well as system availability. (CVE-2021-21347)

    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 occupy a thread that consumes maximum CPU     time and will never return. 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.
    (CVE-2021-21348)

    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 request data from internal resources that     are not publicly available 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. (CVE-2021-21349)

    A flaw was found in xstream. A remote attacker may be able to execute arbitrary code only by manipulating     the processed input stream. The highest threat from this vulnerability is to data confidentiality and     integrity as well as system availability. (CVE-2021-21350)

    XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16,     there is a 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. If you rely on     XStream's default blacklist of the Security Framework, you will have to use at least version 1.4.16.
    (CVE-2021-21351)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 18.04 LTS / 20.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-4943-1 advisory.

    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. This issue affected only     affected Ubuntu 20.10. (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. This issue only affected Ubuntu 20.10. (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. This issue only affected Ubuntu 20.10.
    (CVE-2020-26259)

    It was discovered that XStream was vulnerable to denial of service, arbitrary code execution, arbitrary     file deletion and server-side forgery attacks. A remote attacker could cause any of those issues by     manipulating the processed input stream. (CVE-2021-21341, CVE-2021-21342, CVE-2021-21343 CVE-2021-21344,     CVE-2021-21345, CVE-2021-21346, CVE-2021-21347, CVE-2021-21348, CVE-2021-21349, CVE-2021-21350,     CVE-2021-21351)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

In XStream there is a vulnerability which may allow a remote attacker to load and execute arbitrary code from a remote host only by manipulating the processed input stream.

The type hierarchies for java.io.InputStream, java.nio.channels.Channel, javax.activation.DataSource and javax.sql.rowsel.BaseRowSet are now blacklisted as well as the individual types com.sun.corba.se.impl.activation.ServerTableEntry, com.sun.tools.javac.processing.JavacProcessingEnvironment$NameProcessI terator, sun.awt.datatransfer.DataTransferer$IndexOrderComparator, and sun.swing.SwingLazyValue. Additionally the internal type Accessor$GetterSetterReflection of JAXB, the internal types MethodGetter$PrivilegedGetter and ServiceFinder$ServiceNameIterator of JAX-WS, all inner classes of javafx.collections.ObservableList and an internal ClassLoader used in a private BCEL copy are now part of the default blacklist and the deserialization of XML containing one of the types will fail. You will have to enable these types by explicit configuration, if you need them.

For Debian 9 stretch, these problems have been fixed in version 1.4.11.1-1+deb9u2.

We recommend that you upgrade your libxstream-java packages.

For the detailed security status of libxstream-java please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/libxstream-java

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
206123	Ubuntu 14.04 LTS / 16.04 LTS : XStream vulnerabilities (USN-6978-1)	Nessus	Ubuntu Local Security Checks	critical
155294	Debian DSA-5004-1 : libxstream-java - security update	Nessus	Debian Local Security Checks	critical
151746	openSUSE 15 Security Update : xstream (openSUSE-SU-2021:1840-1)	Nessus	SuSE Local Security Checks	critical
150248	openSUSE Security Update : xstream (openSUSE-2021-832)	Nessus	SuSE Local Security Checks	critical
149867	Amazon Linux 2 : xstream (ALAS-2021-1645)	Nessus	Amazon Linux Local Security Checks	critical
149408	Ubuntu 18.04 LTS / 20.04 LTS : XStream vulnerabilities (USN-4943-1)	Nessus	Ubuntu Local Security Checks	critical
148312	Debian DLA-2616-1 : libxstream-java security update	Nessus	Debian Local Security Checks	critical

Detections

Analytics

CVE-2021-21341

high

Tenable Plugins

critical

critical

critical

critical

critical

critical

critical