1 files changed, 62 insertions, 0 deletions

diff --git a/meta/recipes-extended/ghostscript/ghostscript/CVE-2023-43115.patch b/meta/recipes-extended/ghostscript/ghostscript/CVE-2023-43115.patch
new file mode 100644
index 0000000000..3acb8a503c
--- /dev/null
+++ b/meta/recipes-extended/ghostscript/ghostscript/CVE-2023-43115.patch
@@ -0,0 +1,62 @@
+From 8b0f20002536867bd73ff4552408a72597190cbe Mon Sep 17 00:00:00 2001
+From: Ken Sharp <ken.sharp@artifex.com>
+Date: Thu, 24 Aug 2023 15:24:35 +0100
+Subject: [PATCH] IJS device - try and secure the IJS server startup
+
+Bug #707051 ""ijs" device can execute arbitrary commands"
+
+The problem is that the 'IJS' device needs to start the IJS server, and
+that is indeed an arbitrary command line. There is (apparently) no way
+to validate it. Indeed, this is covered quite clearly in the comments
+at the start of the source:
+
+ * WARNING: The ijs server can be selected on the gs command line
+ * which is a security risk, since any program can be run.
+
+Previously this used the awful LockSafetyParams hackery, which we
+abandoned some time ago because it simply couldn't be made secure (it
+was implemented in PostScript and was therefore vulnerable to PostScript
+programs).
+
+This commit prevents PostScript programs switching to the IJS device
+after SAFER has been activated, and prevents changes to the IjsServer
+parameter after SAFER has been activated.
+
+SAFER is activated, unless explicitly disabled, before any user
+PostScript is executed which means that the device and the server
+invocation can only be configured on the command line. This does at
+least provide minimal security against malicious PostScript programs.
+
+Upstream-Status: Backport [https://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=e59216049cac290fb437a04c4f41ea46826cfba5]
+CVE: CVE-2023-43115
+Signed-off-by: Vijay Anusuri <vanusuri@mvista.com>
+---
+ devices/gdevijs.c | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+diff --git a/devices/gdevijs.c b/devices/gdevijs.c
+index 3d337c5..e50d69f 100644
+--- a/devices/gdevijs.c
++++ b/devices/gdevijs.c
+@@ -934,6 +934,9 @@ gsijs_finish_copydevice(gx_device *dev, const gx_device *from_dev)
+     static const char rgb[] = "DeviceRGB";
+     gx_device_ijs *ijsdev = (gx_device_ijs *)dev;
+ 
++    if (ijsdev->memory->gs_lib_ctx->core->path_control_active)
++       return_error(gs_error_invalidaccess);
++
+     code = gx_default_finish_copydevice(dev, from_dev);
+     if(code < 0)
+         return code;
+@@ -1363,7 +1366,7 @@ gsijs_put_params(gx_device *dev, gs_param_list *plist)
+     if (code >= 0)
+         code = gsijs_read_string(plist, "IjsServer",
+             ijsdev->IjsServer, sizeof(ijsdev->IjsServer),
+-            dev->LockSafetyParams, is_open);
++           ijsdev->memory->gs_lib_ctx->core->path_control_active, is_open);
+ 
+     if (code >= 0)
+         code = gsijs_read_string_malloc(plist, "DeviceManufacturer",
+-- 
+2.25.1
+