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Message-ID: <d39aa380-efd7-bb01-c6b4-06c5e2affb3c@oracle.com>
Date: Mon, 17 Oct 2022 17:44:06 -0700
From: Alan Coopersmith <alan.coopersmith@...cle.com>
To: oss-security@...ts.openwall.com, "Gary D. Gregory" <ggregory@...che.org>
Subject: Re: CVE-2022-42889: Apache Commons Text prior to
1.10.0 allows RCE when applied to untrusted input due to insecure
interpolation defaults
On 10/13/22 05:09, Gary D. Gregory wrote:
> Severity: important
>
> Description:
>
> Apache Commons Text performs variable interpolation, allowing properties to be dynamically evaluated and expanded. The standard format for interpolation is "${prefix:name}", where "prefix" is used to locate an instance of org.apache.commons.text.lookup.StringLookup that performs the interpolation. Starting with version 1.5 and continuing through 1.9, the set of default Lookup instances included interpolators that could result in arbitrary code execution or contact with remote servers. These lookups are: - "script" - execute expressions using the JVM script execution engine (javax.script) - "dns" - resolve dns records - "url" - load values from urls, including from remote servers Applications using the interpolation defaults in the affected versions may be vulnerable to remote code execution or unintentional contact with remote servers if untrusted configuration values are used. Users are recommended to upgrade to Apache Commons Text 1.10.0, which disables the problematic interpolators by default.
>
> Mitigation:
>
> Upgrade to Apache Commons Text 1.10.0.
>
The advisory from the researcher who found it is at:
https://securitylab.github.com/advisories/GHSL-2022-018_Apache_Commons_Text/
--
-Alan Coopersmith- alan.coopersmith@...cle.com
Oracle Solaris Engineering - https://blogs.oracle.com/solaris
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