Date: Tue, 16 Apr 2013 10:55:28 +0200 From: Petr Matousek <pmatouse@...hat.com> To: oss-security@...ts.openwall.com Subject: CVE-2013-1922 -- qemu: qemu-nbd block format auto-detection vulnerability A security flaw was found in the way qemu-nbd, the QEMU Disk Network Block Device server tool of QEMU, performed detection of image formats (the image format has been previously autodetected). A guest operating system administrator could write a header to particular raw disk image format, describing another format than original one for that disk image, leading to scenario in which after restart of that guest, QEMU would detect new format of the image, and could allow the guest to read any file on the host if QEMU was sufficiently privileged. This issue was found by Daniel Berrange of Red Hat. References: https://bugzilla.redhat.com/show_bug.cgi?id=923219 http://www.openwall.com/lists/oss-security/2013/04/15/3 Thanks, -- Petr Matousek / Red Hat Security Response Team
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