oss-sec mailing list archives

Re: CVE-2017-13673 Qemu: vga: reachable assert failure during during display update

From: P J P <ppandit () redhat com>
Date: Tue, 12 Sep 2017 13:01:15 +0530 (IST)

+-- On Sun, 10 Sep 2017, Salvatore Bonaccorso wrote --+
|  As far as I can see, e.g. cpu_physical_memory_snapshot_get_dirty was only 
| introduced in v2.10.0-rc0. The upstream commit associated with the above 

  Right.

|  https://git.qemu.org/gitweb.cgi?p=qemu.git;a=commit;h=bfc56535f793c557aa754c50213fc5f882e6482d
| 
| which fixes
| 
|  https://git.qemu.org/gitweb.cgi?p=qemu.git;a=commit;h=fec5e8c92becad223df9d972770522f64aafdb72
| 
| introducing the use of dirty bitmap snapshots in vga_draw_graphic().
| 
| Do I miss something makeing it affecting as well earlier versions than
| 2.10?

There were two issues, one reproducer worked with Qemu 2.9.x, other didn't 
IIRC.

Thank you.
--
Prasad J Pandit / Red Hat Product Security Team
47AF CE69 3A90 54AA 9045 1053 DD13 3D32 FE5B 041F

Current thread:

CVE-2017-13673 Qemu: vga: reachable assert failure during during display update P J P (Aug 30)
- Re: CVE-2017-13673 Qemu: vga: reachable assert failure during during display update Salvatore Bonaccorso (Sep 10)
  - Re: CVE-2017-13673 Qemu: vga: reachable assert failure during during display update P J P (Sep 12)