diff options
Diffstat (limited to 'gnu/packages/patches/ghostscript-CVE-2018-10194.patch')
| -rw-r--r-- | gnu/packages/patches/ghostscript-CVE-2018-10194.patch | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/gnu/packages/patches/ghostscript-CVE-2018-10194.patch b/gnu/packages/patches/ghostscript-CVE-2018-10194.patch new file mode 100644 index 0000000000..242e57c27c --- /dev/null +++ b/gnu/packages/patches/ghostscript-CVE-2018-10194.patch @@ -0,0 +1,52 @@ +Fix CVE-2018-10194: + +https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-10194 +https://bugs.ghostscript.com/show_bug.cgi?id=699255 + +Patch copied from upstream source repository: + +https://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=39b1e54b2968620723bf32e96764c88797714879 + +From 39b1e54b2968620723bf32e96764c88797714879 Mon Sep 17 00:00:00 2001 +From: Ken Sharp <ken.sharp@artifex.com> +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. +-- +2.18.0 + |