Date: Tue, 17 Jan 2017 17:48:59 +0530 (IST) From: P J P <ppandit@...hat.com> To: oss security list <oss-security@...ts.openwall.com> cc: Jann Horn <jannh@...gle.com>, Greg Kurz <groug@...d.org> Subject: CVE-2016-9602 Qemu: 9p: virtfs allows guest to access host filesystem Hello, Quick Emulator(Qemu) built with the VirtFS, host directory sharing via Plan 9 File System(9pfs) support, is vulnerable to an improper link following issue. It could occur while accessing symbolic link files on a shared host directory. A privileged user inside guest could use this flaw to access host file system beyond the shared folder and potentially escalating their privileges on a host. Reference: ---------- -> http://wiki.qemu.org/Documentation/9psetup -> https://bugzilla.redhat.com/show_bug.cgi?id=1413929 Please see a proposed patch to fix this issue attached herein. This issue was discovered by Jann Horn of Google Project Zero. 'CVE-2016-9602' has been assigned to this issue by Red Hat Inc. Thank you. -- Prasad J Pandit / Red Hat Product Security Team 47AF CE69 3A90 54AA 9045 1053 DD13 3D32 FE5B 041F View attachment "qemu-9pfs-only-allow-directories-during-walk.patch" of type "text/plain" (1785 bytes)
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