CVE-2014-1737, CVE-2014-1738 kernel: floppy: ignore kernel-only members in FDRAWCMD
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SUSE Linux Enterprise Server 11 Service Pack 3 (SLES 11 SP3)
The second critical issue reported as CVE-2014-1738 is linked to the above one.
In raw_cmd_copyout, the entire floppy_raw_cmd structure is copy_to_user'd back to userspace after raw_command processing. A malicious user can send a FDRAWCMD ioctl with the FD_RAW_MORE flag set and, upon inspecting the result in the command argument, find the address of the last floppy_raw_cmd allocation on the kmalloc_nnn slab.
The combination of both issues does give different possibilities to exploit the vulnerabilities of kfree of any desired object, and the leak of the address of a temporary kmalloc() allocation.
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- Document ID:7015062
- Creation Date: 15-May-2014
- Modified Date:03-Mar-2020
- SUSE Linux Enterprise Server
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