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ghostscript: add upstream security fixes for CVE-2017-8291

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CVE-2017-8291 - Artifex Ghostscript through 2017-04-26 allows -dSAFER bypass
and remote command execution via a "/OutputFile (%pipe%" substring in a
crafted .eps document that is an input to the gs program, as exploited in
the wild in April 2017.

For more details, see https://bugzilla.suse.com/show_bug.cgi?id=1036453

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
This commit is contained in:
Peter Korsgaard 2017-04-28 09:49:30 +02:00
parent 051e9851f4
commit 874becfd01
2 changed files with 95 additions and 0 deletions
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33
package/ghostscript/0003-Bug-697799-have-.eqproc-check-its-parameters.patch Normal file
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@ -0,0 +1,33 @@
From 4f83478c88c2e05d6e8d79ca4557eb039354d2f3 Mon Sep 17 00:00:00 2001
From: Chris Liddell <chris.liddell@artifex.com>
Date: Thu, 27 Apr 2017 13:03:33 +0100
Subject: [PATCH] Bug 697799: have .eqproc check its parameters
The Ghostscript custom operator .eqproc was not check the number or type of
the parameters it was given.
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
---
psi/zmisc3.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/psi/zmisc3.c b/psi/zmisc3.c
index 54b304246..37293ff4b 100644
--- a/psi/zmisc3.c
+++ b/psi/zmisc3.c
@@ -56,6 +56,12 @@ zeqproc(i_ctx_t *i_ctx_p)
ref2_t stack[MAX_DEPTH + 1];
ref2_t *top = stack;
+ if (ref_stack_count(&o_stack) < 2)
+ return_error(gs_error_stackunderflow);
+ if (!r_is_array(op - 1) || !r_is_array(op)) {
+ return_error(gs_error_typecheck);
+ }
+
make_array(&stack[0].proc1, 0, 1, op - 1);
make_array(&stack[0].proc2, 0, 1, op);
for (;;) {
--
2.11.0

62
package/ghostscript/0004-Bug-697799-have-.rsdparams-check-its-parameters.patch Normal file
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@ -0,0 +1,62 @@
From 04b37bbce174eed24edec7ad5b920eb93db4d47d Mon Sep 17 00:00:00 2001
From: Chris Liddell <chris.liddell@artifex.com>
Date: Thu, 27 Apr 2017 13:21:31 +0100
Subject: [PATCH] Bug 697799: have .rsdparams check its parameters
The Ghostscript internal operator .rsdparams wasn't checking the number or
type of the operands it was being passed. Do so.
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
---
psi/zfrsd.c | 22 +++++++++++++++-------
1 file changed, 15 insertions(+), 7 deletions(-)
diff --git a/psi/zfrsd.c b/psi/zfrsd.c
index 191107d8a..950588d69 100644
--- a/psi/zfrsd.c
+++ b/psi/zfrsd.c
@@ -49,13 +49,20 @@ zrsdparams(i_ctx_t *i_ctx_p)
ref *pFilter;
ref *pDecodeParms;
int Intent = 0;
- bool AsyncRead;
+ bool AsyncRead = false;
ref empty_array, filter1_array, parms1_array;
uint i;
- int code;
+ int code = 0;
+
+ if (ref_stack_count(&o_stack) < 1)
+ return_error(gs_error_stackunderflow);
+ if (!r_has_type(op, t_dictionary) && !r_has_type(op, t_null)) {
+ return_error(gs_error_typecheck);
+ }
make_empty_array(&empty_array, a_readonly);
- if (dict_find_string(op, "Filter", &pFilter) > 0) {
+ if (r_has_type(op, t_dictionary)
+ && dict_find_string(op, "Filter", &pFilter) > 0) {
if (!r_is_array(pFilter)) {
if (!r_has_type(pFilter, t_name))
return_error(gs_error_typecheck);
@@ -94,12 +101,13 @@ zrsdparams(i_ctx_t *i_ctx_p)
return_error(gs_error_typecheck);
}
}
- code = dict_int_param(op, "Intent", 0, 3, 0, &Intent);
+ if (r_has_type(op, t_dictionary))
+ code = dict_int_param(op, "Intent", 0, 3, 0, &Intent);
if (code < 0 && code != gs_error_rangecheck) /* out-of-range int is ok, use 0 */
return code;
- if ((code = dict_bool_param(op, "AsyncRead", false, &AsyncRead)) < 0
- )
- return code;
+ if (r_has_type(op, t_dictionary))
+ if ((code = dict_bool_param(op, "AsyncRead", false, &AsyncRead)) < 0)
+ return code;
push(1);
op[-1] = *pFilter;
if (pDecodeParms)
--
2.11.0