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[Qemu-devel] [Bug 786211] Re: Missing checks for valid, writable, firmwa
From: |
T. Huth |
Subject: |
[Qemu-devel] [Bug 786211] Re: Missing checks for valid, writable, firmware in fw_cfg_write |
Date: |
Tue, 18 Oct 2016 21:14:24 -0000 |
fw_cfg_write() support has been removed since QEMU 2.4, so I think we
can treat this as fixed now:
http://git.qemu.org/?p=qemu.git;a=commitdiff;h=023e3148567ac898c725813
** Changed in: qemu
Status: New => Fix Released
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https://bugs.launchpad.net/bugs/786211
Title:
Missing checks for valid, writable, firmware in fw_cfg_write
Status in QEMU:
Fix Released
Bug description:
The `fw_cfg_write` function in the firmware emulation is missing
checks to ensure that the firmware being written is (a) a valid index,
and (b) writable. This can lead to a segmentation fault and
potentially (in the case of writing to FW_CFG_INVALID), memory
corruption, although the attacker has fairly limited control over
whether and what corruption is possible.
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T. Huth <=