diff --git a/ghostscript-9.23-000-CVE-2018-10194.patch b/ghostscript-9.23-000-CVE-2018-10194.patch new file mode 100644 index 0000000..142336e --- /dev/null +++ b/ghostscript-9.23-000-CVE-2018-10194.patch @@ -0,0 +1,43 @@ +From 39b1e54b2968620723bf32e96764c88797714879 Mon Sep 17 00:00:00 2001 +From: Ken Sharp +Date: Wed, 18 Apr 2018 15:46:32 +0100 +Subject: [PATCH] pdfwrite - Guard against trying to output an infinite number + +Bug #699255 " Buffer overflow on pprintg1 due to mishandle postscript file data to pdf" + +The file uses an enormous parameter to xyxhow, causing an overflow in +the calculation of text positioning (value > 1e39). + +Since this is basically a nonsense value, and PostScript only supports +real values up to 1e38, this patch follows the same approach as for +a degenerate CTM, and treats it as 0. + +Adobe Acrobat Distiller throws a limitcheck error, so we could do that +instead if this approach proves to be a problem. +--- + devices/vector/gdevpdts.c | 7 ++++++- + 1 file changed, 6 insertions(+), 1 deletion(-) + +diff --git a/devices/vector/gdevpdts.c b/devices/vector/gdevpdts.c +index 848ad781f..172fe6bc3 100644 +--- a/devices/vector/gdevpdts.c ++++ b/devices/vector/gdevpdts.c +@@ -103,9 +103,14 @@ append_text_move(pdf_text_state_t *pts, double dw) + static int + set_text_distance(gs_point *pdist, double dx, double dy, const gs_matrix *pmat) + { +- int code = gs_distance_transform_inverse(dx, dy, pmat, pdist); ++ int code; + double rounded; + ++ if (dx > 1e38 || dy > 1e38) ++ code = gs_error_undefinedresult; ++ else ++ code = gs_distance_transform_inverse(dx, dy, pmat, pdist); ++ + if (code == gs_error_undefinedresult) { + /* The CTM is degenerate. + Can't know the distance in user space. +-- +2.14.3 + diff --git a/ghostscript.spec b/ghostscript.spec index 2a6329d..5f365e5 100644 --- a/ghostscript.spec +++ b/ghostscript.spec @@ -43,7 +43,7 @@ Name: ghostscript Summary: Interpreter for PostScript language & PDF Version: 9.23 -Release: 1%{?dist} +Release: 2%{?dist} License: AGPLv3+ @@ -93,6 +93,7 @@ BuildRequires: libXt-devel # Upstream patches -- official upstream patches released by upstream since the # ---------------- last rebase that are necessary for any reason: #Patch000: example000.patch +Patch000: ghostscript-9.23-000-CVE-2018-10194.patch # Downstream patches -- these should be always included when doing rebase: @@ -461,6 +462,9 @@ done # ============================================================================= %changelog +* Mon Apr 23 2018 David Kaspar [Dee'Kej] - 9.23-2 +- Fix for CVE-2018-10194 added (bug #1569821) + * Wed Mar 21 2018 David Kaspar [Dee'Kej] - 9.23-1 - Rebase to latest upstream version