Date: Fri, 21 Sep 2012 12:20:20 +0200 From: Matthias Weckbecker <mweckbecker@...e.de> To: oss-security@...ts.openwall.com Cc: vcizek@...e.de, tmraz@...hat.com Subject: CVE request(?): gpg: improper file permssions set when en/de-crypting files Hello Steve, Kurt, Vitezslav, Tomas, vendors, we have recently been notified about a potential issue with gpg: When files are en/de-crypted the result is written world-readable by default. Short example (quote from ): # de-crypting % gpg sikrit.gpg % ll sikrit* -rw-r--r-- 1 gp users 12 Sep 17 09:41 sikrit -rw------- 1 gp users 480 Sep 17 09:40 sikrit.gpg # en-crypting % echo "my password" > sikrit % chmod go= sikrit % ll sikrit -rw------- 1 gp users 12 Sep 17 09:38 sikrit % gpg -e -r pfeifer sikrit % wipe sikrit % ll sikrit.gpg -rw-r--r-- 1 gp users 480 Sep 17 09:40 sikrit.gpg  https://bugzilla.novell.com/show_bug.cgi?id=780943 Wouldn't one usually expect files that were previously encrypted to contain sensitive content (that's probably why content is encrypted at all)? And if so, shouldn't such files be only readable by certain users / group of users by default? Otherwise, a file that is e.g. decrypted in /tmp might leak due to the file permissions being too loose. I'm not quite sure whether to assign a CVE for this, so I thought I'd just add a question mark behind the subject and let the list (and Kurt) decide. Thanks, Matthias -- Matthias Weckbecker, Senior Security Engineer, SUSE Security Team SUSE LINUX Products GmbH, Maxfeldstr. 5, D-90409 Nuernberg, Germany Tel: +49-911-74053-0; http://suse.com/ SUSE LINUX Products GmbH, GF: Jeff Hawn, HRB 16746 (AG Nuernberg)
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