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Posted to dev@tika.apache.org by "Tim Allison (Jira)" <ji...@apache.org> on 2022/04/20 19:14:00 UTC
[jira] [Resolved] (TIKA-3294) Usage of "ECB" mode for "AES" is insecure
[ https://issues.apache.org/jira/browse/TIKA-3294?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Tim Allison resolved TIKA-3294.
-------------------------------
Resolution: Not A Problem
> Usage of "ECB" mode for "AES" is insecure
> ------------------------------------------
>
> Key: TIKA-3294
> URL: https://issues.apache.org/jira/browse/TIKA-3294
> Project: Tika
> Issue Type: Improvement
> Reporter: Md Mahir Asef Kabir
> Priority: Major
>
> In file [https://github.com/apache/tika/blob/a43784b19f6b0955478dded71521b0491d21c90b/tika-parsers/tika-parsers-classic/tika-parsers-classic-modules/tika-parser-miscoffice-module/src/main/java/org/apache/tika/parser/hwp/HwpTextExtractorV5.java] (at Line 370) and https://github.com/apache/tika/blob/a43784b19f6b0955478dded71521b0491d21c90b/tika-parsers/tika-parsers-classic/tika-parsers-classic-modules/tika-parser-miscoffice-module/src/main/java/org/apache/tika/parser/hwp/HwpTextExtractorV5.java (at line ) the insecure "ECB" mode is used.
> *Security Impact*:
> ECB mode allows the attacker to do the following -
> detect whether two ECB-encrypted messages are identical;
> detect whether two ECB-encrypted messages share a common prefix;
> detect whether two ECB-encrypted messages share other common substrings, as long as those substrings are aligned at block boundaries; or
> detect whether (and where) a single ECB-encrypted message contains repetitive data (such as long runs of spaces or null bytes, repeated header fields, or coincidentally repeated phrases in the text). - Collected from [here|https://crypto.stackexchange.com/questions/20941/why-shouldnt-i-use-ecb-encryption#:~:text=The%20main%20reason%20not%20to,will%20leak%20to%20some%20extent).]
> *Useful Resources*:
> https://blog.filippo.io/the-ecb-penguin/
> *Solution we suggest*:
> Use GCM mode instead of default or ECB mode.
> *Please share with us your opinions/comments if there is any*:
> Is the bug report helpful?
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