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Date: Fri, 4 Nov 2022 15:54:46 -0500
From: John Helmert III <>
Subject: Re: CVE-2022-42920: Apache Commons BCEL prior to
 6.6.0 allows producing arbitrary bytecode via out-of-bounds writing

On Fri, Nov 04, 2022 at 05:35:34PM +0000, Gary D. Gregory wrote:
> Description:
> Apache Commons BCEL has a number of APIs that would normally only allow changing specific class characteristics. However, due to an out-of-bounds writing issue, these APIs can be used to produce arbitrary bytecode. This could be abused in applications that pass attacker-controllable data to those APIs, giving the attacker more control over the resulting bytecode than otherwise expected. Update to Apache Commons BCEL 6.6.0.
> This issue is being tracked as BCEL-363
> Credit:
> Reported by Felix Wilhelm (Google); GitHub pull request to Apache Commons BCEL #147 by Richard Atkins (; PR derived from OpenJDK ( commit 13bf52c8d876528a43be7cb77a1f452d29a21492 by Aleksei Voitylov and RealCLanger (Christoph Langer

This appears to be a duplicate of CVE-2022-34169 (also issued by the
Apache CNA), and previously discussed on this list at [1]. It was
eventually reported to the list that the vulnerability was actually in
bcel [2].

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