diff options
Diffstat (limited to 'gnu/packages/patches/mupdf-CVE-2017-5896.patch')
| -rw-r--r-- | gnu/packages/patches/mupdf-CVE-2017-5896.patch | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/gnu/packages/patches/mupdf-CVE-2017-5896.patch b/gnu/packages/patches/mupdf-CVE-2017-5896.patch new file mode 100644 index 0000000000..1537ecc896 --- /dev/null +++ b/gnu/packages/patches/mupdf-CVE-2017-5896.patch @@ -0,0 +1,63 @@ +Fix CVE-2017-5896: + +https://bugs.ghostscript.com/show_bug.cgi?id=697515 +https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-5896 +http://www.openwall.com/lists/oss-security/2017/02/10/1 +https://security-tracker.debian.org/tracker/CVE-2017-5896 +https://blogs.gentoo.org/ago/2017/02/09/mupdf-use-after-free-in-fz_subsample_pixmap-pixmap-c/ + +Patch lifted from upstream source repository: + +http://git.ghostscript.com/?p=mupdf.git;h=2c4e5867ee699b1081527bc6c6ea0e99a35a5c27 + +From 2c4e5867ee699b1081527bc6c6ea0e99a35a5c27 Mon Sep 17 00:00:00 2001 +From: Robin Watts <Robin.Watts@artifex.com> +Date: Thu, 9 Feb 2017 07:12:16 -0800 +Subject: [PATCH] bug 697515: Fix out of bounds read in fz_subsample_pixmap + +Pointer arithmetic for final special case was going wrong. +--- + source/fitz/pixmap.c | 6 ++++-- + 1 file changed, 4 insertions(+), 2 deletions(-) + +diff --git a/source/fitz/pixmap.c b/source/fitz/pixmap.c +index a8317127..f1291dc2 100644 +--- a/source/fitz/pixmap.c ++++ b/source/fitz/pixmap.c +@@ -1104,6 +1104,7 @@ fz_subsample_pixmap_ARM(unsigned char *ptr, int w, int h, int f, int factor, + "@STACK:r1,<9>,factor,n,fwd,back,back2,fwd2,divX,back4,fwd4,fwd3,divY,back5,divXY\n" + "ldr r4, [r13,#4*22] @ r4 = divXY \n" + "ldr r5, [r13,#4*11] @ for (nn = n; nn > 0; n--) { \n" ++ "ldr r8, [r13,#4*17] @ r8 = back4 \n" + "18: @ \n" + "mov r14,#0 @ r14= v = 0 \n" + "sub r5, r5, r1, LSL #8 @ for (xx = x; xx > 0; x--) { \n" +@@ -1120,7 +1121,7 @@ fz_subsample_pixmap_ARM(unsigned char *ptr, int w, int h, int f, int factor, + "mul r14,r4, r14 @ r14= v *= divX \n" + "mov r14,r14,LSR #16 @ r14= v >>= 16 \n" + "strb r14,[r9], #1 @ *d++ = r14 \n" +- "sub r0, r0, r8 @ s -= back2 \n" ++ "sub r0, r0, r8 @ s -= back4 \n" + "subs r5, r5, #1 @ n-- \n" + "bgt 18b @ } \n" + "21: @ \n" +@@ -1249,6 +1250,7 @@ fz_subsample_pixmap(fz_context *ctx, fz_pixmap *tile, int factor) + x += f; + if (x > 0) + { ++ int back4 = x * n - 1; + div = x * y; + for (nn = n; nn > 0; nn--) + { +@@ -1263,7 +1265,7 @@ fz_subsample_pixmap(fz_context *ctx, fz_pixmap *tile, int factor) + s -= back5; + } + *d++ = v / div; +- s -= back2; ++ s -= back4; + } + } + } +-- +2.12.0 + |