kensington 15/03/17 14:41:54 Added: qtgui-4.8.5-CVE-2015-0295.patch Log: Backport patch from upstream to solve CVE-2015-0295 wrt bug #541972. (Portage version: 2.2.17/cvs/Linux x86_64, signed Manifest commit with key 0x06B1F38DCA45A1EC!)
Revision Changes Path 1.1 dev-qt/qtgui/files/qtgui-4.8.5-CVE-2015-0295.patch file : http://sources.gentoo.org/viewvc.cgi/gentoo-x86/dev-qt/qtgui/files/qtgui-4.8.5-CVE-2015-0295.patch?rev=1.1&view=markup plain: http://sources.gentoo.org/viewvc.cgi/gentoo-x86/dev-qt/qtgui/files/qtgui-4.8.5-CVE-2015-0295.patch?rev=1.1&content-type=text/plain Index: qtgui-4.8.5-CVE-2015-0295.patch =================================================================== >From e50aa2252cdd5cb53eef7d8c4503c7edff634f68 Mon Sep 17 00:00:00 2001 From: "Richard J. Moore" <r...@kde.org> Date: Tue, 24 Feb 2015 19:02:35 +0000 Subject: [PATCH] Fix a division by zero when processing malformed BMP files. This fixes a division by 0 when processing a maliciously crafted BMP file. No impact beyond DoS. Backport of 661f6bfd032dacc62841037732816a583640e187 Task-number: QTBUG-44547 Change-Id: I43f06e752b11cb50669101460902a82b885ae618 Reviewed-by: Thiago Macieira <thiago.macie...@intel.com> --- src/gui/image/qbmphandler.cpp | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/src/gui/image/qbmphandler.cpp b/src/gui/image/qbmphandler.cpp index b22e842..30fa9e0 100644 --- a/src/gui/image/qbmphandler.cpp +++ b/src/gui/image/qbmphandler.cpp @@ -319,10 +319,16 @@ static bool read_dib_body(QDataStream &s, const BMP_INFOHDR &bi, int offset, int } } else if (comp == BMP_BITFIELDS && (nbits == 16 || nbits == 32)) { red_shift = calc_shift(red_mask); + if (((red_mask >> red_shift) + 1) == 0) + return false; red_scale = 256 / ((red_mask >> red_shift) + 1); green_shift = calc_shift(green_mask); + if (((green_mask >> green_shift) + 1) == 0) + return false; green_scale = 256 / ((green_mask >> green_shift) + 1); blue_shift = calc_shift(blue_mask); + if (((blue_mask >> blue_shift) + 1) == 0) + return false; blue_scale = 256 / ((blue_mask >> blue_shift) + 1); } else if (comp == BMP_RGB && (nbits == 24 || nbits == 32)) { blue_mask = 0x000000ff; -- 2.0.5
