1 files changed, 121 insertions, 0 deletions

diff --git a/meta/recipes-extended/ghostscript/ghostscript/CVE-2021-3781_1.patch b/meta/recipes-extended/ghostscript/ghostscript/CVE-2021-3781_1.patch
new file mode 100644
index 0000000000..033ba77f9a
--- /dev/null
+++ b/meta/recipes-extended/ghostscript/ghostscript/CVE-2021-3781_1.patch
@@ -0,0 +1,121 @@
+From 3920a727fb19e19f597e518610ce2416d08cb75f Mon Sep 17 00:00:00 2001
+From: Chris Liddell <chris.liddell@artifex.com>
+Date: Thu, 20 Aug 2020 17:19:09 +0100
+Subject: [PATCH] Fix pdfwrite "%d" mode with file permissions
+
+Firstly, in gx_device_delete_output_file the iodev pointer was being passed
+to the delete_method incorrectly (passing a pointer to that pointer). Thus
+when we attempted to use that to confirm permission to delete the file, it
+crashed. Credit to Ken for finding that.
+
+Secondly, due to the way pdfwrite works, when running with an output file per
+page, it creates the current output file immediately it has completed writing
+the previous one. Thus, it has to delete that partial file on exit.
+
+Previously, the output file was not added to the "control" permission list,
+so an attempt to delete it would result in an error. So add the output file
+to the "control" as well as "write" list.
+
+CVE: CVE-2021-3781
+
+Upstream-Status: Backport:
+https://git.ghostscript.com/?p=ghostpdl.git;a=commit;f=base/gslibctx.c;h=3920a727fb19e19f597e518610ce2416d08cb75f
+
+Signed-off-by: Davide Gardenal <davide.gardenal@huawei.com>
+---
+ base/gsdevice.c |  2 +-
+ base/gslibctx.c | 20 ++++++++++++++------
+ 2 files changed, 15 insertions(+), 7 deletions(-)
+
+diff --git a/base/gsdevice.c b/base/gsdevice.c
+index 913119495..ac78af93f 100644
+--- a/base/gsdevice.c
++++ b/base/gsdevice.c
+@@ -1185,7 +1185,7 @@ int gx_device_delete_output_file(const gx_device * dev, const char *fname)
+         parsed.len = strlen(parsed.fname);
+     }
+     if (parsed.iodev)
+-        code = parsed.iodev->procs.delete_file((gx_io_device *)(&parsed.iodev), (const char *)parsed.fname);
++        code = parsed.iodev->procs.delete_file((gx_io_device *)(parsed.iodev), (const char *)parsed.fname);
+     else
+         code = gs_note_error(gs_error_invalidfileaccess);
+ 
+diff --git a/base/gslibctx.c b/base/gslibctx.c
+index d726c58b5..ff8fc895e 100644
+--- a/base/gslibctx.c
++++ b/base/gslibctx.c
+@@ -647,7 +647,7 @@ gs_add_outputfile_control_path(gs_memory_t *mem, const char *fname)
+     char *fp, f[gp_file_name_sizeof];
+     const int pipe = 124; /* ASCII code for '|' */
+     const int len = strlen(fname);
+-    int i;
++    int i, code;
+ 
+     /* Be sure the string copy will fit */
+     if (len >= gp_file_name_sizeof)
+@@ -658,8 +658,6 @@ gs_add_outputfile_control_path(gs_memory_t *mem, const char *fname)
+     rewrite_percent_specifiers(f);
+     for (i = 0; i < len; i++) {
+         if (f[i] == pipe) {
+-           int code;
+-
+            fp = &f[i + 1];
+            /* Because we potentially have to check file permissions at two levels
+               for the output file (gx_device_open_output_file and the low level
+@@ -671,10 +669,16 @@ gs_add_outputfile_control_path(gs_memory_t *mem, const char *fname)
+            if (code < 0)
+                return code;
+            break;
++           code = gs_add_control_path(mem, gs_permit_file_control, f);
++           if (code < 0)
++               return code;
+         }
+         if (!IS_WHITESPACE(f[i]))
+             break;
+     }
++    code = gs_add_control_path(mem, gs_permit_file_control, fp);
++    if (code < 0)
++        return code;
+     return gs_add_control_path(mem, gs_permit_file_writing, fp);
+ }
+ 
+@@ -684,7 +688,7 @@ gs_remove_outputfile_control_path(gs_memory_t *mem, const char *fname)
+     char *fp, f[gp_file_name_sizeof];
+     const int pipe = 124; /* ASCII code for '|' */
+     const int len = strlen(fname);
+-    int i;
++    int i, code;
+ 
+     /* Be sure the string copy will fit */
+     if (len >= gp_file_name_sizeof)
+@@ -694,8 +698,6 @@ gs_remove_outputfile_control_path(gs_memory_t *mem, const char *fname)
+     /* Try to rewrite any %d (or similar) in the string */
+     for (i = 0; i < len; i++) {
+         if (f[i] == pipe) {
+-           int code;
+-
+            fp = &f[i + 1];
+            /* Because we potentially have to check file permissions at two levels
+               for the output file (gx_device_open_output_file and the low level
+@@ -704,6 +706,9 @@ gs_remove_outputfile_control_path(gs_memory_t *mem, const char *fname)
+               the pipe_fopen(), the leading '|' has been stripped.
+             */
+            code = gs_remove_control_path(mem, gs_permit_file_writing, f);
++           if (code < 0)
++               return code;
++           code = gs_remove_control_path(mem, gs_permit_file_control, f);
+            if (code < 0)
+                return code;
+            break;
+@@ -711,6 +716,9 @@ gs_remove_outputfile_control_path(gs_memory_t *mem, const char *fname)
+         if (!IS_WHITESPACE(f[i]))
+             break;
+     }
++    code = gs_remove_control_path(mem, gs_permit_file_control, fp);
++    if (code < 0)
++        return code;
+     return gs_remove_control_path(mem, gs_permit_file_writing, fp);
+ }
+ 
+-- 
+2.25.1