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Date: Sun, 10 May 2015 00:22:30 +0200
From: Jakub Wilk <>
Subject: CVE requests: didjvu, pdf2djvu: insecure use of /tmp

didjvu and pdf2djvu are DjVu encoders that both use c44 (a command-line 
IW44 encoder, part of DjVuLibre) under the hood. More precisely, this is 
what they do:

* create a unique temporary file directly in /tmp (or in $TMPDIR)
* pass name of this file to c44 as the output file name

Unfortunately, it turns out that c44 deletes the output file, and then 
creates a new one under the same name (without O_EXCL). This opens a 
race window, during which malicious user could their own file under this 

The bugs were fixed in didjvu 0.4 and pdf2djvu 0.7.21.
Please assign CVEs to these vulnerabilities.


Jakub Wilk

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