Stack-based buffer overflow in the get_matching_model_microcode function in arch/x86/kernel/cpu/microcode/intel_early.c in the Linux kernel before 4.0 allows context-dependent attackers to gain privileges by constructing a crafted microcode header and leveraging root privileges for write access to the initrd.
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
| Link | Tags |
|---|---|
| http://lists.fedoraproject.org/pipermail/package-announce/2015-March/153329.html | third party advisory vendor advisory |
| http://www.securitytracker.com/id/1032414 | vdb entry third party advisory |
| http://www.openwall.com/lists/oss-security/2015/03/20/18 | mailing list |
| https://github.com/torvalds/linux/commit/f84598bd7c851f8b0bf8cd0d7c3be0d73c432ff4 | patch |
| http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=f84598bd7c851f8b0bf8cd0d7c3be0d73c432ff4 | broken link |
| http://rhn.redhat.com/errata/RHSA-2015-1534.html | third party advisory vendor advisory |
| https://bugzilla.redhat.com/show_bug.cgi?id=1204722 | issue tracking |