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-rw-r--r--gnu/packages/patches/jbig2dec-CVE-2017-7975.patch40
1 files changed, 40 insertions, 0 deletions
diff --git a/gnu/packages/patches/jbig2dec-CVE-2017-7975.patch b/gnu/packages/patches/jbig2dec-CVE-2017-7975.patch
new file mode 100644
index 0000000000..c83fe9d9f2
--- /dev/null
+++ b/gnu/packages/patches/jbig2dec-CVE-2017-7975.patch
@@ -0,0 +1,40 @@
+Fix CVE-2017-7975:
+
+https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7975
+https://bugs.ghostscript.com/show_bug.cgi?id=697693
+
+Patch copied from upstream source repository:
+
+https://git.ghostscript.com/?p=jbig2dec.git;a=commit;h=f8992b8fe65c170c8624226f127c5c4bfed42c66
+
+From f8992b8fe65c170c8624226f127c5c4bfed42c66 Mon Sep 17 00:00:00 2001
+From: Shailesh Mistry <shailesh.mistry@hotmail.co.uk>
+Date: Wed, 26 Apr 2017 22:12:14 +0100
+Subject: [PATCH] Bug 697693: Prevent SEGV due to integer overflow.
+
+While building a Huffman table, the start and end points were susceptible
+to integer overflow.
+
+Thank you to Jiaqi for finding this issue and suggesting a patch.
+---
+ jbig2_huffman.c | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/jbig2_huffman.c b/jbig2_huffman.c
+index 511e461..b4189a1 100644
+--- a/jbig2_huffman.c
++++ b/jbig2_huffman.c
+@@ -421,8 +421,8 @@ jbig2_build_huffman_table(Jbig2Ctx *ctx, const Jbig2HuffmanParams *params)
+
+ if (PREFLEN == CURLEN) {
+ int RANGELEN = lines[CURTEMP].RANGELEN;
+- int start_j = CURCODE << shift;
+- int end_j = (CURCODE + 1) << shift;
++ uint32_t start_j = CURCODE << shift;
++ uint32_t end_j = (CURCODE + 1) << shift;
+ byte eflags = 0;
+
+ if (end_j > max_j) {
+--
+2.13.0
+