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CVE Request: irssi: information disclosure vulnerabilit in buf.pl
From: Salvatore Bonaccorso <carnil () debian org>
Date: Sat, 24 Sep 2016 15:44:19 +0200
Hi An information disclosure vulnerability in the buf.pl script provided by irssi, a terminal based IRC client has been found. Quoting the advisory at: https://irssi.org/2016/09/22/buf.pl-update/ ]
buf.pl update available Posted on September 22^nd 2016 An information disclosure vulnerability was found, reported and fixed in the buf.pl script by its author. CWE Classification: CWE-732, CWE-538 Impact Other users on the same machine may be able to retrieve the whole window contents after /UPGRADE when the buf.pl script is loaded. Furthermore, this dump of the windows contents is never removed afterwards. Since buf.pl is also an Irssi core script and we recommended its use to retain your window content, many people could potentially be affected by this. Remote users may be able to retrieve these contents when combined with other path traversal vulnerabilities in public facing services on that machine. Detailed analysis buf.pl restores the scrollbuffer between “/upgrade”s by writing the contents to a file, and reading that after the new process was spawned. Through that file, the contents of (private) chat conversations may leak to other users. Mitigating facts Careful users with a limited umask (e.g. 077) are not affected by this bug. However, most Linux systems default to a umask of 022, meaning that files written without further restricting the permissions, are readable by any user. Affected versions All up to 2.13 Fixed versions buf.pl 2.20 Resolution Update the buf.pl script with the latest version from scripts.irssi.org.
Upstream fix: https://github.com/irssi/scripts.irssi.org/commit/f1b1eb154baa684fad5d65bf4dff79c8ded8b65a Debian Bug report: https://bugs.debian.org/838762 Could a CVE be assigned for this issue? Regards, Salvatore
Current thread:
- CVE Request: irssi: information disclosure vulnerabilit in buf.pl Salvatore Bonaccorso (Sep 24)
- Re: CVE Request: irssi: information disclosure vulnerabilit in buf.pl cve-assign (Sep 25)