Bug 549402 – app-emulation/qemu security vulnerability CVE-2015-3456 ("Venom")

• Status: RESOLVED DUPLICATE of bug 549404
• Product: Gentoo Linux

[Description Daniel Kenzelmann 2015-05-13 18:49:16 UTC]

During processing of certain commands such as FD_CMD_READ_ID and
FD_CMD_DRIVE_SPECIFICATION_COMMAND the fifo memory access could
get out of bounds leading to memory corruption with values coming
from the guest.

Fix this by making sure that the index is always bounded by the
allocated memory.

This is CVE-2015-3456.

Reproducible: Always

[Comment 1 Daniel Kenzelmann 2015-05-13 18:50:52 UTC]

Patch is in URL value above, putting it here again for visibility.

http://git.qemu.org/?p=qemu.git;a=commitdiff;h=e907746266721f305d67bc0718795fedee2e824c

[Comment 2 Daniel Kenzelmann 2015-05-13 18:57:33 UTC]

Created attachment 403210 [details, diff]
Patch from qemu git

[Comment 3 Daniel Kenzelmann 2015-05-13 19:00:40 UTC]

--- qemu-2.3.0.ebuild	2015-04-28 11:20:05.000000000 +0200
+++ qemu-2.3.0.ebuild	2015-05-13 21:00:02.318525020 +0200
@@ -257,6 +257,7 @@
 	use nls || rm -f po/*.po
 
 	epatch "${FILESDIR}"/qemu-1.7.0-cflags.patch
+	epatch "${FILESDIR}"/qemu-2.3.0-CVE-2015-3456.patch # CVE-2015-3456
 	[[ -n ${BACKPORTS} ]] && \
 		EPATCH_FORCE=yes EPATCH_SUFFIX="patch" EPATCH_SOURCE="${S}/patches" \
 			epatch

[Comment 4 Daniel Kenzelmann 2015-05-13 19:03:11 UTC]

Duplicate of 549404 :-) closing...

*** This bug has been marked as a duplicate of bug 549404 ***