ALAS2-2021-1729

References: CVE-2021-39139  CVE-2021-39140  CVE-2021-39141  CVE-2021-39144  CVE-2021-39145  CVE-2021-39146  CVE-2021-39147  CVE-2021-39148  CVE-2021-39149  CVE-2021-39150  CVE-2021-39151  CVE-2021-39152  CVE-2021-39153  CVE-2021-39154 
FAQs regarding Amazon Linux ALAS/CVE Severity

Issue Overview:

A flaw was found in xstream, a simple library used to serialize objects to XML and back again. This flaw allows a remote attacker to load and execute arbitrary code from a remote host by manipulating the processed input stream. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability. (CVE-2021-39139)

XStream is a simple library to serialize objects to XML and back again. In affected versions this vulnerability 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. XStream 1.4.18 uses no longer a blacklist by default, since it cannot be secured for general purpose. (CVE-2021-39140)

A flaw was found in xstream, a simple library used to serialize objects to XML and back again. This flaw allows a remote attacker to load and execute arbitrary code from a remote host by manipulating the processed input stream. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability. (CVE-2021-39141) (CVE-2021-39144) (CVE-2021-39145) (CVE-2021-39146) (CVE-2021-39147) (CVE-2021-39148) (CVE-2021-39149) (CVE-2021-39151) (CVE-2021-39153) (CVE-2021-39154)

A flaw was found in xstream, a simple library used to serialize objects to XML and back again. This flaw allows a remote attacker to request data from internal resources that are not publicly available by manipulating the processed input stream with Java runtime versions 14 to 8. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability. (CVE-2021-39150) (CVE-2021-39152)

Issue Correction:
Run yum update xstream to update your system.

New Packages:

noarch:
    xstream-1.3.1-16.amzn2.noarch
    xstream-javadoc-1.3.1-16.amzn2.noarch

src:
    xstream-1.3.1-16.amzn2.src