[GHSA-8623-9fwr-4cxv] Quick-Media Batik Codec FIX package has Code Injection vulnerability#7437
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All the explanation that is given about this vulnerability is a patch (liuyueyi/quick-media@e52fcee) which results in a compilation error. The code which was patched was correct:
https://github.com/liuyueyi/quick-media/blob/f600bc7960f957df4c4d53c3bb414c571f4c190d/plugins/svg-plugin/batik-codec-fix/src/main/java/org/apache/batik/ext/awt/image/codec/png/PNGImageEncoder.java#L91-L93
and the
PNGImageEncoder.javafile cannot be compiled after the patch, because it references abufferfield which is not there. Actually, that tree is not even compiled during thequick-mediabuild so no one noticed. The patch was most likely intended to apply to a differentwritemethod:https://github.com/liuyueyi/quick-media/blob/f600bc7960f957df4c4d53c3bb414c571f4c190d/plugins/svg-plugin/batik-codec-fix/src/main/java/org/apache/batik/ext/awt/image/codec/png/PNGImageEncoder.java#L238
But even if the checks were added there, the practical difference would be that in case of a negative
lenthe code would silently do nothing instead of throwing an exception, which is what it is supposed to do. The security implications are unclear, if any (again we are talking about a file which is not part of the deliverables of that project).This "Code Injection vulnerability" is bogus.