[gs-commits] ghostpdl branch, master, updated. jbig2dec-0.14-1593-gcd1b1ca
[email protected] (Ken Sharp)
| Newsgroups | gmane.comp.printing.ghostscript.cvs |
|---|---|
| Message-ID | <[email protected]> |
The ghostpdl branch, master has been updated
via cd1b1cacadac2479e291efe611979bdc1b3bdb19 (commit)
from ec0b35fed3de9f313c7c992844daac5f3f28618d (commit)
----------------------------------------------------------------------
commit cd1b1cacadac2479e291efe611979bdc1b3bdb19
Author: Ken Sharp <[email protected]>
Date: Wed Aug 21 10:10:51 2019 +0100
PDF interpreter - review .forceput security
Bug #701450 "Safer Mode Bypass by .forceput Exposure in .pdfexectoken"
By abusing the error handler it was possible to get the PDFDEBUG portion
of .pdfexectoken, which uses .forceput left readable.
Add an executeonly appropriately to make sure that clause isn't readable
no mstter what.
Review all the uses of .forceput searching for similar cases, add
executeonly as required to secure those. All cases in the PostScript
support files seem to be covered already.
diff --git a/Resource/Init/pdf_base.ps b/Resource/Init/pdf_base.ps
index 2e28cdd..02503ee 100644
--- a/Resource/Init/pdf_base.ps
+++ b/Resource/Init/pdf_base.ps
@@ -157,7 +157,7 @@ currentdict /num-chars-dict .undef
{
dup ==only () = flush
} ifelse % PDFSTEP
- } if % PDFDEBUG
+ } executeonly if % PDFDEBUG
2 copy .knownget {
exch pop exch pop exch pop exec
} {
diff --git a/Resource/Init/pdf_draw.ps b/Resource/Init/pdf_draw.ps
index 11eb485..fe3fc56 100644
--- a/Resource/Init/pdf_draw.ps
+++ b/Resource/Init/pdf_draw.ps
@@ -501,8 +501,8 @@ end
( Output may be incorrect.\n) pdfformaterror
//pdfdict /.gs_warning_issued //true .forceput
PDFSTOPONERROR { /gs /undefined signalerror } if
- } if
- }
+ } executeonly if
+ } executeonly
ifelse
} bind executeonly def
@@ -1152,7 +1152,7 @@ currentdict end readonly def
.setglobal
pdfformaterror
} executeonly ifelse
- }
+ } executeonly
{
currentglobal //pdfdict gcheck .setglobal
//pdfdict /.Qqwarning_issued //true .forceput
@@ -1160,8 +1160,8 @@ currentdict end readonly def
pdfformaterror
} executeonly ifelse
end
- } ifelse
- } loop
+ } executeonly ifelse
+ } executeonly loop
{
(\n **** Error: File has unbalanced q/Q operators \(too many q's\)\n Output may be incorrect.\n)
//pdfdict /.Qqwarning_issued .knownget
@@ -1175,14 +1175,14 @@ currentdict end readonly def
.setglobal
pdfformaterror
} executeonly ifelse
- }
+ } executeonly
{
currentglobal //pdfdict gcheck .setglobal
//pdfdict /.Qqwarning_issued //true .forceput
.setglobal
pdfformaterror
} executeonly ifelse
- } if
+ } executeonly if
pop
% restore pdfemptycount
diff --git a/Resource/Init/pdf_font.ps b/Resource/Init/pdf_font.ps
index da07da5..81b7af1 100644
--- a/Resource/Init/pdf_font.ps
+++ b/Resource/Init/pdf_font.ps
@@ -638,7 +638,7 @@ currentdict end readonly def
currentglobal 2 index dup gcheck setglobal
/FontInfo 5 dict dup 5 1 roll .forceput
setglobal
- } if
+ } executeonly if
dup /GlyphNames2Unicode .knownget not {
//true % No existing G2U, make one
} {
@@ -668,10 +668,12 @@ currentdict end readonly def
pop % font-res font-dict encoding|null font-info
pop % font-res font-dict encoding|null
//false % We built a GlyphNames2Unicode table, don't need to process further
- }{
+ } executeonly
+ {
//true % name is not Identity-V or H, fail by falling through
}ifelse
- } {
+ } executeonly
+ {
//true
} ifelse % not a name, try as a dictionary (as specified)
@@ -759,9 +761,9 @@ currentdict end readonly def
PDFDEBUG {
(.processToUnicode end) =
} if
- } if
- } if
- } stopped
+ } executeonly if
+ } executeonly if
+ } executeonly stopped
{
.dstackdepth 1 countdictstack 1 sub
{pop end} for
@@ -1298,19 +1300,20 @@ currentdict /eexec_pdf_param_dict .undef
//pdfdict /.Qqwarning_issued //true .forceput
} executeonly if
Q
- } repeat
+ } executeonly repeat
Q
- } PDFfile fileposition 2 .execn % Keep pdfcount valid.
+ } executeonly PDFfile fileposition 2 .execn % Keep pdfcount valid.
PDFfile exch setfileposition
- } ifelse
- } {
+ } executeonly ifelse
+ } executeonly
+ {
% PDF Type 3 fonts don't use .notdef
% d1 implementation adjusts the width as needed
0 0 0 0 0 0
pdfopdict /d1 get exec
} ifelse
end end
- } bdef
+ } executeonly bdef
dup currentdict Encoding .processToUnicode
currentdict end .completefont exch pop
} bind executeonly odef
@@ -2124,9 +2127,9 @@ currentdict /CMap_read_dict undef
(Will continue, but content may be missing.) = flush
} ifelse
} if
- } if
+ } executeonly if
/findresource cvx /undefined signalerror
- } loop
+ } executeonly loop
} bind executeonly odef
/buildCIDType0 { % <CIDFontType0-font-resource> buildCIDType0 <font>
diff --git a/Resource/Init/pdf_main.ps b/Resource/Init/pdf_main.ps
index 00d7e36..7690bae 100644
--- a/Resource/Init/pdf_main.ps
+++ b/Resource/Init/pdf_main.ps
@@ -2771,15 +2771,15 @@ currentdict /PDF2PS_matrix_key undef
.setglobal
pdfformaterror
} executeonly ifelse
- }
+ } executeonly
{
currentglobal //pdfdict gcheck .setglobal
//pdfdict /.Qqwarning_issued //true .forceput
.setglobal
pdfformaterror
} executeonly ifelse
- } if
- } if
+ } executeonly if
+ } executeonly if
pop
count PDFexecstackcount sub { pop } repeat
(after exec) VMDEBUG
diff --git a/Resource/Init/pdf_ops.ps b/Resource/Init/pdf_ops.ps
index a15c8c6..d594035 100644
--- a/Resource/Init/pdf_ops.ps
+++ b/Resource/Init/pdf_ops.ps
@@ -192,14 +192,14 @@ currentdict /gput_always_allow .undef
.setglobal
pdfformaterror
} executeonly ifelse
- }
+ } executeonly
{
currentglobal //pdfdict gcheck .setglobal
//pdfdict /.Qqwarning_issued //true .forceput
.setglobal
pdfformaterror
} executeonly ifelse
- } if
+ } executeonly if
} bind executeonly odef
% Save PDF gstate
@@ -446,11 +446,12 @@ currentdict /gput_always_allow .undef
dup type /booleantype eq {
.currentSMask type /dicttype eq {
.currentSMask /Processed 2 index .forceput
- } executeonly
- {
+ } executeonly
+ {
.setSMask
- }ifelse
- }{
+ }ifelse
+ } executeonly
+ {
.setSMask
}ifelse
Summary of changes:
Resource/Init/pdf_base.ps | 2 +-
Resource/Init/pdf_draw.ps | 14 +++++++-------
Resource/Init/pdf_font.ps | 29 ++++++++++++++++-------------
Resource/Init/pdf_main.ps | 6 +++---
Resource/Init/pdf_ops.ps | 11 ++++++-----
5 files changed, 33 insertions(+), 29 deletions(-)