!130 Fix CVE-2024-46955

From: @li_ning_jie 
Reviewed-by: @dillon_chen 
Signed-off-by: @dillon_chen

backport-CVE-2024-46955.patch

@@ -0,0 +1,59 @@
+From ca1fc2aefe9796e321d0589afe7efb35063c8b2a Mon Sep 17 00:00:00 2001
+From: Zdenek Hutyra <zhutyra@centrum.cz>
+Date: Fri, 30 Aug 2024 13:11:53 +0100
+Subject: [PATCH] PS interpreter - check Indexed colour space index
+
+Bug #707990 "Out of bounds read when reading color in "Indexed" color space"
+
+Check the 'index' is in the valid range (0 to hival) for the colour
+space.
+
+Also a couple of additional checks on the type of the 'proc' for
+Indexed, DeviceN and Separation spaces. Make sure these really are
+procs in case the user changed the colour space array.
+
+CVE-2024-46955
+---
+ psi/zcolor.c | 6 ++++++
+ 1 file changed, 6 insertions(+)
+
+diff --git a/psi/zcolor.c b/psi/zcolor.c
+index c0d73c2..7d15ec7 100644
+--- a/psi/zcolor.c
++++ b/psi/zcolor.c
+@@ -3629,6 +3629,7 @@ static int septransform(i_ctx_t *i_ctx_p, ref *sepspace, int *usealternate, int
+         code = array_get(imemory, sepspace, 3, &proc);
+         if (code < 0)
+             return code;
++        check_proc(proc);
+         *esp = proc;
+         return o_push_estack;
+     }
+@@ -4450,6 +4451,7 @@ static int devicentransform(i_ctx_t *i_ctx_p, ref *devicenspace, int *usealterna
+         code = array_get(imemory, devicenspace, 3, &proc);
+         if (code < 0)
+             return code;
++        check_proc(proc);
+         *esp = proc;
+         return o_push_estack;
+     }
+@@ -4865,6 +4867,7 @@ static int indexedbasecolor(i_ctx_t * i_ctx_p, ref *space, int base, int *stage,
+             code = array_get(imemory, space, 3, &proc);
+             if (code < 0)
+                 return code;
++            check_proc(proc);
+             *ep = proc;	/* lookup proc */
+             return o_push_estack;
+         } else {
+@@ -4878,6 +4881,9 @@ static int indexedbasecolor(i_ctx_t * i_ctx_p, ref *space, int base, int *stage,
+             if (!r_has_type(op, t_integer))
+                 return_error (gs_error_typecheck);
+             index = op->value.intval;
++            /* Ensure it is in range. See bug #707990 */
++            if (index < 0 || index > pcs->params.indexed.hival)
++                return_error(gs_error_rangecheck);
+             /* And remove it from the stack. */
+             ref_stack_pop(&o_stack, 1);
+             op = osp;
+-- 
+2.27.0

ghostscript.spec

@@ -9,7 +9,7 @@
 
 Name:             ghostscript
 Version:          9.55.0
-Release:          13
+Release:          14
 Summary:          An interpreter for PostScript and PDF files
 License:          AGPLv3+
 URL:              https://ghostscript.com/
@@ -45,6 +45,7 @@ Patch17:  Bug-707510-5-2-The-original-fix-was-overly-aggressive.patch
 Patch18:  Bug-707510-fix-LIBIDN-usage.patch
 Patch19:   backport-CVE-2024-46953.patch
 Patch20:   backport-CVE-2024-46956.patch
+Patch21:   backport-CVE-2024-46955.patch
 
 BuildRequires:    automake gcc
 BuildRequires:    adobe-mappings-cmap-devel adobe-mappings-pdf-devel
@@ -205,6 +206,12 @@ install -m 0755 -d %{buildroot}%{_datadir}/%{name}/conf.d/
 %{_bindir}/dvipdf
 
 %changelog
+* Wed Oct 30 2024 liningjie <liningjie@xfusion.com> - 9.55.0-14
+- Type:CVE
+- ID:NA
+- SUG:NA
+- DECS: Fix CVE-2024-46955
+
 * Fri Oct 25 2024 liningjie <liningjie@xfusion.com> - 9.55.0-13
 - Type:CVE
 - ID:NA