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Posted to hdfs-issues@hadoop.apache.org by "Steve Loughran (Jira)" <ji...@apache.org> on 2022/10/13 17:12:00 UTC
[jira] [Updated] (HDFS-16766) hdfs ec command loads (administrator provided) erasure code policy files without disabling xml entity expansion
[ https://issues.apache.org/jira/browse/HDFS-16766?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Steve Loughran updated HDFS-16766:
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Summary: hdfs ec command loads (administrator provided) erasure code policy files without disabling xml entity expansion (was: XML External Entity (XXE) attacks can occur while processing XML received from an untrusted source)
> hdfs ec command loads (administrator provided) erasure code policy files without disabling xml entity expansion
> ---------------------------------------------------------------------------------------------------------------
>
> Key: HDFS-16766
> URL: https://issues.apache.org/jira/browse/HDFS-16766
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: security
> Affects Versions: 3.3.4
> Reporter: Jing
> Assignee: Ashutosh Gupta
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.4.0, 3.3.5, 3.2.5
>
>
> XML External Entity (XXE) attacks can occur when an XML parser supports XML entities while processing XML received from an untrusted source. The attack resides in XML input containing references to an external entity an is parsed by the weakly configured javax.xml.parsers.DocumentBuilder XML parser.
>
> https://github.com/apache/hadoop/blob/trunk/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/util/ECPolicyLoader.java#L93
> h3. sonatype-2022-5732
> If anyone is landing on this page following the sonatype-2022-5732 alert
> # the xml expansion only happens on the command line of the {{hdfs ec)) command https://hadoop.apache.org/docs/stable/hadoop-project-dist/hadoop-hdfs/HDFSErasureCoding.html#Administrative_commands
> # the outcome of entity expansion will be the command failing/running out of memory
> # if you cluster admin is loading erasure policies from untrusted sources, there are fundamental process issues to worry about beyond xml references
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