mirror of
https://git.in.rschanz.org/ryan77627/guix.git
synced 2024-11-08 16:06:16 -05:00
10cb88f85c
* gnu/packages/patches/jbig2dec-CVE-2017-7885.patch, gnu/packages/patches/jbig2dec-CVE-2017-7975.patch, gnu/packages/patches/jbig2dec-CVE-2017-7976.patch: New files. * gnu/local.mk (dist_patch_DATA): Add them. * gnu/packages/image.scm (jbig2dec)[source]: Use them.
122 lines
4.9 KiB
Diff
122 lines
4.9 KiB
Diff
Fix CVE-2017-7976:
|
|
|
|
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7976
|
|
https://bugs.ghostscript.com/show_bug.cgi?id=697683
|
|
|
|
In order to make the bug-fix patch apply, we also include an earlier commit
|
|
that it depends on.
|
|
|
|
Patches copied from upstream source repository:
|
|
|
|
Earlier commit, creating context for the CVE fix:
|
|
https://git.ghostscript.com/?p=jbig2dec.git;a=commit;h=9d2c4f3bdb0bd003deae788e7187c0f86e624544
|
|
|
|
CVE-2017-7976 bug fix:
|
|
https://git.ghostscript.com/?p=jbig2dec.git;a=commit;h=cfa054925de49675ac5445515ebf036fa9379ac6
|
|
|
|
From 9d2c4f3bdb0bd003deae788e7187c0f86e624544 Mon Sep 17 00:00:00 2001
|
|
From: Tor Andersson <tor.andersson@artifex.com>
|
|
Date: Wed, 14 Dec 2016 15:56:31 +0100
|
|
Subject: [PATCH] Fix warnings: remove unsigned < 0 tests that are always
|
|
false.
|
|
|
|
---
|
|
jbig2_image.c | 2 +-
|
|
jbig2_mmr.c | 2 +-
|
|
jbig2_symbol_dict.c | 9 ++-------
|
|
3 files changed, 4 insertions(+), 9 deletions(-)
|
|
|
|
diff --git a/jbig2_image.c b/jbig2_image.c
|
|
index 94e5a4c..00f966b 100644
|
|
--- a/jbig2_image.c
|
|
+++ b/jbig2_image.c
|
|
@@ -256,7 +256,7 @@ jbig2_image_compose(Jbig2Ctx *ctx, Jbig2Image *dst, Jbig2Image *src, int x, int
|
|
/* general OR case */
|
|
s = ss;
|
|
d = dd = dst->data + y * dst->stride + leftbyte;
|
|
- if (d < dst->data || leftbyte > dst->stride || h * dst->stride < 0 || d - leftbyte + h * dst->stride > dst->data + dst->height * dst->stride) {
|
|
+ if (d < dst->data || leftbyte > dst->stride || d - leftbyte + h * dst->stride > dst->data + dst->height * dst->stride) {
|
|
return jbig2_error(ctx, JBIG2_SEVERITY_FATAL, -1, "preventing heap overflow in jbig2_image_compose");
|
|
}
|
|
if (leftbyte == rightbyte) {
|
|
diff --git a/jbig2_mmr.c b/jbig2_mmr.c
|
|
index 390e27c..da54934 100644
|
|
--- a/jbig2_mmr.c
|
|
+++ b/jbig2_mmr.c
|
|
@@ -977,7 +977,7 @@ jbig2_decode_mmr_line(Jbig2MmrCtx *mmr, const byte *ref, byte *dst)
|
|
if (b1 < 2)
|
|
break;
|
|
if (c) {
|
|
- if (b1 - 2 < a0 || a0 < 0)
|
|
+ if (a0 == MINUS1 || b1 - 2 < a0)
|
|
return -1;
|
|
jbig2_set_bits(dst, a0, b1 - 2);
|
|
}
|
|
diff --git a/jbig2_symbol_dict.c b/jbig2_symbol_dict.c
|
|
index 11a2252..4acaba9 100644
|
|
--- a/jbig2_symbol_dict.c
|
|
+++ b/jbig2_symbol_dict.c
|
|
@@ -92,11 +92,6 @@ jbig2_sd_new(Jbig2Ctx *ctx, uint32_t n_symbols)
|
|
{
|
|
Jbig2SymbolDict *new_dict = NULL;
|
|
|
|
- if (n_symbols < 0) {
|
|
- jbig2_error(ctx, JBIG2_SEVERITY_FATAL, -1, "Negative number of symbols in symbol dict: %d", n_symbols);
|
|
- return NULL;
|
|
- }
|
|
-
|
|
new_dict = jbig2_new(ctx, Jbig2SymbolDict, 1);
|
|
if (new_dict != NULL) {
|
|
new_dict->glyphs = jbig2_new(ctx, Jbig2Image *, n_symbols);
|
|
@@ -613,7 +608,7 @@ jbig2_decode_symbol_dict(Jbig2Ctx *ctx,
|
|
uint32_t j;
|
|
int x;
|
|
|
|
- if (code || (BMSIZE < 0)) {
|
|
+ if (code) {
|
|
jbig2_error(ctx, JBIG2_SEVERITY_FATAL, segment->number, "error decoding size of collective bitmap!");
|
|
goto cleanup4;
|
|
}
|
|
@@ -716,7 +711,7 @@ jbig2_decode_symbol_dict(Jbig2Ctx *ctx,
|
|
code = jbig2_arith_int_decode(IAEX, as, (int32_t *)&exrunlength);
|
|
/* prevent infinite loop */
|
|
zerolength = exrunlength > 0 ? 0 : zerolength + 1;
|
|
- if (code || (exrunlength > limit - i) || (exrunlength < 0) || (zerolength > 4) || (exflag && (exrunlength + j > params->SDNUMEXSYMS))) {
|
|
+ if (code || (exrunlength > limit - i) || (zerolength > 4) || (exflag && (exrunlength + j > params->SDNUMEXSYMS))) {
|
|
if (code)
|
|
jbig2_error(ctx, JBIG2_SEVERITY_FATAL, segment->number, "failed to decode exrunlength for exported symbols");
|
|
else if (exrunlength <= 0)
|
|
--
|
|
2.13.0
|
|
|
|
From cfa054925de49675ac5445515ebf036fa9379ac6 Mon Sep 17 00:00:00 2001
|
|
From: Shailesh Mistry <shailesh.mistry@hotmail.co.uk>
|
|
Date: Wed, 10 May 2017 17:50:39 +0100
|
|
Subject: [PATCH] Bug 697683: Bounds check before reading from image source
|
|
data.
|
|
|
|
Add extra check to prevent reading off the end of the image source
|
|
data buffer.
|
|
|
|
Thank you to Dai Ge for finding this issue and suggesting a patch.
|
|
---
|
|
jbig2_image.c | 3 ++-
|
|
1 file changed, 2 insertions(+), 1 deletion(-)
|
|
|
|
diff --git a/jbig2_image.c b/jbig2_image.c
|
|
index 661d0a5..ae161b9 100644
|
|
--- a/jbig2_image.c
|
|
+++ b/jbig2_image.c
|
|
@@ -263,7 +263,8 @@ jbig2_image_compose(Jbig2Ctx *ctx, Jbig2Image *dst, Jbig2Image *src, int x, int
|
|
/* general OR case */
|
|
s = ss;
|
|
d = dd = dst->data + y * dst->stride + leftbyte;
|
|
- if (d < dst->data || leftbyte > dst->stride || d - leftbyte + h * dst->stride > dst->data + dst->height * dst->stride) {
|
|
+ if (d < dst->data || leftbyte > dst->stride || d - leftbyte + h * dst->stride > dst->data + dst->height * dst->stride ||
|
|
+ s - leftbyte + (h - 1) * src->stride + rightbyte > src->data + src->height * src->stride) {
|
|
return jbig2_error(ctx, JBIG2_SEVERITY_FATAL, -1, "preventing heap overflow in jbig2_image_compose");
|
|
}
|
|
if (leftbyte == rightbyte) {
|
|
--
|
|
2.13.0
|
|
|