ghostscript: Fix 3 CVEs

It was discovered that the ghostscript /invalidaccess checks fail under
certain conditions. An attacker could possibly exploit this to bypass
the -dSAFER protection and, for example, execute arbitrary shell commands
via a specially crafted PostScript document.

It was found that the superexec operator was available in the internal
dictionary in ghostscript before 9.27. A specially crafted PostScript
file could use this flaw in order to, for example, have access to the
file system outside of the constrains imposed by -dSAFER.

It was found that the forceput operator could be extracted from the
DefineResource method in ghostscript before 9.27. A specially crafted
PostScript file could use this flaw in order to, for example, have
access to the file system outside of the constrains imposed by -dSAFER.

References:
https://nvd.nist.gov/vuln/detail/CVE-2019-6116
https://www.openwall.com/lists/oss-security/2019/01/23/5
https://nvd.nist.gov/vuln/detail/CVE-2019-3835
https://nvd.nist.gov/vuln/detail/CVE-2019-3838

Upstream patches:
http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=13b0a36
http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=2db98f9
http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=99f1309
http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=59d8f4d
http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=2768d1a
http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=49c8092
http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=2ff600a
http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=779664d
http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=e8acf6d
http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=2055917
http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=d683d1e
http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=ed9fcd9
http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=a82601e

(From OE-Core rev: 12e140dfdac8456772223c816e37bd869419bb18)

(From OE-Core rev: cf5d29dcac6247e8476f7af78b4e0bb129b94677)

Signed-off-by: Ovidiu Panait <ovidiu.panait@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
[Fix for CVE-2019-6116 is already in thud, so that has been removed]
Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/meta/recipes-extended/ghostscript/ghostscript_9.26.bb b/meta/recipes-extended/ghostscript/ghostscript_9.26.bb
index ad4c5e17d2..bb32347880 100644
--- a/meta/recipes-extended/ghostscript/ghostscript_9.26.bb
+++ b/meta/recipes-extended/ghostscript/ghostscript_9.26.bb
@@ -39,6 +39,12 @@ SRC_URI = "${SRC_URI_BASE} \
            file://CVE-2019-6116-0005.patch \
            file://CVE-2019-6116-0006.patch \
            file://CVE-2019-6116-0007.patch \
+           file://CVE-2019-3835-0001.patch \
+           file://CVE-2019-3835-0002.patch \
+           file://CVE-2019-3835-0003.patch \
+           file://CVE-2019-3835-0004.patch \
+           file://CVE-2019-3838-0001.patch \
+           file://CVE-2019-3838-0002.patch \
            "
 
 SRC_URI_class-native = "${SRC_URI_BASE} \