config/cf/{DragonFly,OpenBSD,darwin}.cf: Remove Freetype imake settings
config/cf/darwinLib.tmpl: Do not link against Freetype
debian/control: Remove Freetype and Xft dependencies
*/Imakefile: Purge Freetype includes
lib/DtWidget/ComboBoxP.h
lib/DtWidget/SpinBoxP.h
programs/dtfile/ChangeDirP.c
programs/dtlogin/vgcallback.c
Undefine USE_XFT so Motif 2.3 doesn't pull in Freetype
CDE included Freetype and Xft solely to satisfy builds of Motif with
Xft support enabled. However, as CDE only supports bitmap fonts, this
dependency was entirely superfluous and unnecessarily broke backwards
compatibility with older systems.
config/cf/bsdLib.rules: Switch -fpic to -fPIC
lib/DtXinerama/Imakefile: Use $(PICFLAGS) instead of -fpic
Several tickets have been opened by users encountering the low 8KiB
GOT limit on SPARC systems running BSD. This change makes CDE builds
on BSD more consistent with those on Linux, where -fPIC has been the
default without any reported issues.
CDE has relied upon catgets() implementations following a relaxed
interpretation of the XPG internationalization standard that ignored
-1, the standard error value returned by catopen, as the catalog
argument. However, this same behavior causes segmentation faults with
the musl C library.
This patch:
- Centralizes (with the exception of ToolTalk) all calls to catopen(),
catgets(), and catclose() through MsgCat within the DtSvc library.
- Prevents calls to catgets() and catclose() that rely upon
undefined behavior.
- Eliminates a number of bespoke catgets() wrappers, including multiple
redundant caching implementations designed to work around a design
peculiarity in HP/UX.
- Eases building CDE without XPG internationalization support by providing
the appropriate macros.
Marco Ivaldi <marco.ivaldi@mediaservice.net> has identified 3
vulnerabilities in CDE.
Two of them could affect our CDE (open-source version), while the 3rd
(sdtcm_convert) is Solaris specific.
The two vulnerabilities, both of which affect dtsession could allow a
local privilege escalation to root. A POC exists for Solaris. The
POC will not function on our CDE for two main reasons:
- the POC is Solaris specific
- The overflowed variables in question are allocated on the heap,
whereas in Solaris these variables are located on the stack.
The first vulnerability allows an extra long palette name to be used
to cause a crash via insufficient validation in
SrvPalette.c:CheckMonitor().
The second, which has not yet been assigned a CERT CVE resides in
SmCreateDirs.c:_DtCreateDtDirs() in libDtSvc. Due to insufficient
bounds checking, a crash or corruption can be achieved by using a very
long DISPLAY name.
This one is considered difficult to exploit, and no POC code is
available at this time. CDE 2.x code-bases are also listed as not
vulnerable, however some work has been done anyway to do some proper
bounds checking in this function.
The following text portions are copied from the relevant advisories,
which have not been released as of this writing.
NOTE: Oracle CDE does NOT use CDE 2.3.0a or earlier as mentioned
below. They are completely different code-bases):
Regarding CVE-2020-2692:
A buffer overflow in the CheckMonitor() function in the Common
Desktop Environment 2.3.0a and earlier, as distributed with Oracle
Solaris 10 1/13 (Update 11) and earlier, allows local users to gain
root privileges via a long palette name passed to dtsession in a
malicious .Xdefaults file.
Note that Oracle Solaris CDE is based on the original CDE 1.x train,
which is different from the CDE 2.x codebase that was later open
sourced. Most notably, the vulnerable buffer in the Oracle Solaris
CDE is stack-based, while in the open source version it is
heap-based.
Regarding the DtSvc bug, which does not currently have a CERT CVE:
A difficult to exploit stack-based buffer overflow in the
_DtCreateDtDirs() function in the Common Desktop Environment version
distributed with Oracle Solaris 10 1/13 (Update 11) and earlier may
allow local users to corrupt memory and potentially execute
arbitrary code in order to escalate privileges via a long X11
display name. The vulnerable function is located in the libDtSvc
library and can be reached by executing the setuid program
dtsession.
The open source version of CDE (based on the CDE 2.x codebase) is
not affected.
There was code (_DtSimpleError() and _DtSimpleErrornoError()) that
only used snprintf when USE_SNPRINTF was defined, which it never was
of course. We just remove the 2 checks and always use [v]snprintf.
For some reason, the #include of iconv.h was removed, and dummy stubs
were put in place on linux systems (only). This caused iconv() calls
to be completely ignored.
Now we use iconv() just like very other OS we support.
Liang Chang