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author | Stefan Ghinea <stefan.ghinea@windriver.com> | 2019-11-21 17:28:04 +0200 |
---|---|---|
committer | Richard Purdie <richard.purdie@linuxfoundation.org> | 2019-11-25 17:56:34 +0000 |
commit | 0bb88ac63b4e1728373c6425477a32f7a6362b2c (patch) | |
tree | 13199d39313eaeac5c7899a55a547afb65fe3f82 | |
parent | 3bb0a089840caf51065d7f8b59b3e055bce31e1c (diff) | |
download | openembedded-core-contrib-0bb88ac63b4e1728373c6425477a32f7a6362b2c.tar.gz |
ghostscript: CVE-2019-14869
A flaw was found in all versions of ghostscript 9.x before 9.28,
where the `.charkeys` procedure, where it did not properly secure
its privileged calls, enabling scripts to bypass `-dSAFER` restrictions.
An attacker could abuse this flaw by creating a specially crafted
PostScript file that could escalate privileges within the Ghostscript
and access files outside of restricted areas or execute commands.
References:
https://nvd.nist.gov/vuln/detail/CVE-2019-14869
Upstream patches:
https://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=485904
Signed-off-by: Stefan Ghinea <stefan.ghinea@windriver.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
-rw-r--r-- | meta/recipes-extended/ghostscript/ghostscript/CVE-2019-14869-0001.patch | 70 | ||||
-rw-r--r-- | meta/recipes-extended/ghostscript/ghostscript_9.27.bb | 1 |
2 files changed, 71 insertions, 0 deletions
diff --git a/meta/recipes-extended/ghostscript/ghostscript/CVE-2019-14869-0001.patch b/meta/recipes-extended/ghostscript/ghostscript/CVE-2019-14869-0001.patch new file mode 100644 index 0000000000..715ec1c450 --- /dev/null +++ b/meta/recipes-extended/ghostscript/ghostscript/CVE-2019-14869-0001.patch @@ -0,0 +1,70 @@ +From 485904772c5f0aa1140032746e5a0abfc40f4cef Mon Sep 17 00:00:00 2001 +From: Chris Liddell <chris.liddell@artifex.com> +Date: Tue, 5 Nov 2019 09:45:27 +0000 +Subject: [PATCH] Bug 701841: remove .forceput from /.charkeys + +When loading Type 1 or Truetype fonts from disk, we attempt to extend the glyph +name table to include all identifiable glyph names from the Adobe Glyph List. + +In the case of Type 1 fonts, the font itself (almost always) marks the +CharStrings dictionary as read-only, hence we have to use .forceput for that +case. + +But for Truetype fonts, the CharStrings dictionary is created internally and is +not read-only until *after* we have fully populated it (including the extended +glyph names from the AGL), hence there is no need for .forceput, and no need to +carry the security risk of using it. + +Replace with regular put. + +CVE: CVE-2019-14869 +Upstream-Status: Backport [git://git.ghostscript.com/ghostpdl.git] + +Signed-off-by: Stefan Ghinea <stefan.ghinea@windriver.com> +--- + Resource/Init/gs_ttf.ps | 8 ++++---- + 1 file changed, 4 insertions(+), 4 deletions(-) + +diff --git a/Resource/Init/gs_ttf.ps b/Resource/Init/gs_ttf.ps +index e34967d..5354ff0 100644 +--- a/Resource/Init/gs_ttf.ps ++++ b/Resource/Init/gs_ttf.ps +@@ -1301,7 +1301,7 @@ currentdict /.pickcmap_with_no_xlatmap .undef + TTFDEBUG { (\n1 setting alias: ) print dup ==only + ( to be the same as ) print 2 index //== exec } if + +- 7 index 2 index 3 -1 roll exch .forceput ++ 7 index 2 index 3 -1 roll exch put + } forall + pop pop pop + } +@@ -1319,7 +1319,7 @@ currentdict /.pickcmap_with_no_xlatmap .undef + exch pop + TTFDEBUG { (\n2 setting alias: ) print 1 index ==only + ( to use glyph index: ) print dup //== exec } if +- 5 index 3 1 roll .forceput ++ 5 index 3 1 roll put + //false + } + { +@@ -1336,7 +1336,7 @@ currentdict /.pickcmap_with_no_xlatmap .undef + { % CharStrings(dict) isunicode(boolean) cmap(dict) RAGL(dict) gname(name) codep(integer) gindex(integer) + TTFDEBUG { (\3 nsetting alias: ) print 1 index ==only + ( to be index: ) print dup //== exec } if +- exch pop 5 index 3 1 roll .forceput ++ exch pop 5 index 3 1 roll put + } + { + pop pop +@@ -1366,7 +1366,7 @@ currentdict /.pickcmap_with_no_xlatmap .undef + } ifelse + ] + TTFDEBUG { (Encoding: ) print dup === flush } if +-} .bind executeonly odef % hides .forceput ++} .bind odef + + % ---------------- CIDFontType 2 font loading ---------------- % + +-- +2.20.1 + diff --git a/meta/recipes-extended/ghostscript/ghostscript_9.27.bb b/meta/recipes-extended/ghostscript/ghostscript_9.27.bb index 9e1f3e2f49..32f938f254 100644 --- a/meta/recipes-extended/ghostscript/ghostscript_9.27.bb +++ b/meta/recipes-extended/ghostscript/ghostscript_9.27.bb @@ -28,6 +28,7 @@ SRC_URI_BASE = "https://github.com/ArtifexSoftware/ghostpdl-downloads/releases/d file://CVE-2019-14811-0001.patch \ file://CVE-2019-14817-0001.patch \ file://CVE-2019-14817-0002.patch \ + file://CVE-2019-14869-0001.patch \ " SRC_URI = "${SRC_URI_BASE} \ |