Withdrawn by the publisher.

A stack-based buffer overflow vulnerability was found in NBD server implementation in qemu before 2.11 allowing a client to request an export name of size up to 4096 bytes, which in fact should be limited to 256 bytes, causing an out-of-bounds stack write in the qemu process. If NBD server requires TLS, the attacker cannot trigger the buffer overflow without first successfully negotiating TLS.

A stack-based buffer overflow vulnerability was found in NBD server implementation in qemu before 2.11 allowing a client to request an export name of size up to 4096 bytes, which in fact should be limited to 256 bytes, causing an out-of-bounds stack write in the qemu process. If NBD server requires TLS, the attacker cannot trigger the buffer overflow without first successfully negotiating TLS.

QEMU: vga: OOB read access during display update QEMU: VGA: reachable assert failure during display update QEMU: Slirp: use-after-free when sending response Qemu: stack buffer overflow in NBD server triggered via long export name qemu: DoS via large option request Qemu: memory exhaustion through framebuffer update request message in VNC server QEMU: I/O: potential memory exhaustion via websock connection to VNC Qemu: Out-of-bounds read in vga_draw_text routine