commit 41488498b6d9440ee66ab033808cce8323bba7ac Author: Florian Weimer Date: Wed Sep 3 19:45:43 2014 +0200 CVE-2014-6040: Crashes on invalid input in IBM gconv modules [BZ #17325] These changes are based on the fix for BZ #14134 in commit 6e230d11837f3ae7b375ea69d7905f0d18eb79e5. diff --git glibc-2.17-c758a686/iconvdata/Makefile glibc-2.17-c758a686/iconvdata/Makefile index 0a410a1..b6327d6 100644 --- glibc-2.17-c758a686/iconvdata/Makefile +++ glibc-2.17-c758a686/iconvdata/Makefile @@ -297,6 +297,7 @@ $(objpfx)tst-iconv7.out: $(objpfx)gconv-modules \ $(objpfx)iconv-test.out: run-iconv-test.sh $(objpfx)gconv-modules \ $(addprefix $(objpfx),$(modules.so)) \ $(common-objdir)/iconv/iconv_prog TESTS + iconv_modules="$(modules)" \ $(SHELL) $< $(common-objdir) '$(test-wrapper)' > $@ $(objpfx)tst-tables.out: tst-tables.sh $(objpfx)gconv-modules \ diff --git glibc-2.17-c758a686/iconvdata/ibm1364.c glibc-2.17-c758a686/iconvdata/ibm1364.c index 0b5484f..cf80993 100644 --- glibc-2.17-c758a686/iconvdata/ibm1364.c +++ glibc-2.17-c758a686/iconvdata/ibm1364.c @@ -221,7 +221,8 @@ enum ++rp2; \ \ uint32_t res; \ - if (__builtin_expect (ch < rp2->start, 0) \ + if (__builtin_expect (rp2->start == 0xffff, 0) \ + || __builtin_expect (ch < rp2->start, 0) \ || (res = DB_TO_UCS4[ch + rp2->idx], \ __builtin_expect (res, L'\1') == L'\0' && ch != '\0')) \ { \ diff --git glibc-2.17-c758a686/iconvdata/ibm932.c glibc-2.17-c758a686/iconvdata/ibm932.c index f5dca59..aa69d65 100644 --- glibc-2.17-c758a686/iconvdata/ibm932.c +++ glibc-2.17-c758a686/iconvdata/ibm932.c @@ -74,11 +74,12 @@ } \ \ ch = (ch * 0x100) + inptr[1]; \ + /* ch was less than 0xfd. */ \ + assert (ch < 0xfd00); \ while (ch > rp2->end) \ ++rp2; \ \ - if (__builtin_expect (rp2 == NULL, 0) \ - || __builtin_expect (ch < rp2->start, 0) \ + if (__builtin_expect (ch < rp2->start, 0) \ || (res = __ibm932db_to_ucs4[ch + rp2->idx], \ __builtin_expect (res, '\1') == 0 && ch !=0)) \ { \ diff --git glibc-2.17-c758a686/iconvdata/ibm933.c glibc-2.17-c758a686/iconvdata/ibm933.c index f46dfb5..461fb5e 100644 --- glibc-2.17-c758a686/iconvdata/ibm933.c +++ glibc-2.17-c758a686/iconvdata/ibm933.c @@ -162,7 +162,7 @@ enum while (ch > rp2->end) \ ++rp2; \ \ - if (__builtin_expect (rp2 == NULL, 0) \ + if (__builtin_expect (rp2->start == 0xffff, 0) \ || __builtin_expect (ch < rp2->start, 0) \ || (res = __ibm933db_to_ucs4[ch + rp2->idx], \ __builtin_expect (res, L'\1') == L'\0' && ch != '\0')) \ diff --git glibc-2.17-c758a686/iconvdata/ibm935.c glibc-2.17-c758a686/iconvdata/ibm935.c index a8e4e6c..132d816 100644 --- glibc-2.17-c758a686/iconvdata/ibm935.c +++ glibc-2.17-c758a686/iconvdata/ibm935.c @@ -162,7 +162,7 @@ enum while (ch > rp2->end) \ ++rp2; \ \ - if (__builtin_expect (rp2 == NULL, 0) \ + if (__builtin_expect (rp2->start == 0xffff, 0) \ || __builtin_expect (ch < rp2->start, 0) \ || (res = __ibm935db_to_ucs4[ch + rp2->idx], \ __builtin_expect (res, L'\1') == L'\0' && ch != '\0')) \ diff --git glibc-2.17-c758a686/iconvdata/ibm937.c glibc-2.17-c758a686/iconvdata/ibm937.c index 239be61..69b154d 100644 --- glibc-2.17-c758a686/iconvdata/ibm937.c +++ glibc-2.17-c758a686/iconvdata/ibm937.c @@ -162,7 +162,7 @@ enum while (ch > rp2->end) \ ++rp2; \ \ - if (__builtin_expect (rp2 == NULL, 0) \ + if (__builtin_expect (rp2->start == 0xffff, 0) \ || __builtin_expect (ch < rp2->start, 0) \ || (res = __ibm937db_to_ucs4[ch + rp2->idx], \ __builtin_expect (res, L'\1') == L'\0' && ch != '\0')) \ diff --git glibc-2.17-c758a686/iconvdata/ibm939.c glibc-2.17-c758a686/iconvdata/ibm939.c index 5d0db36..9936e2c 100644 --- glibc-2.17-c758a686/iconvdata/ibm939.c +++ glibc-2.17-c758a686/iconvdata/ibm939.c @@ -162,7 +162,7 @@ enum while (ch > rp2->end) \ ++rp2; \ \ - if (__builtin_expect (rp2 == NULL, 0) \ + if (__builtin_expect (rp2->start == 0xffff, 0) \ || __builtin_expect (ch < rp2->start, 0) \ || (res = __ibm939db_to_ucs4[ch + rp2->idx], \ __builtin_expect (res, L'\1') == L'\0' && ch != '\0')) \ diff --git glibc-2.17-c758a686/iconvdata/ibm943.c glibc-2.17-c758a686/iconvdata/ibm943.c index be0c14f..c5d5742 100644 --- glibc-2.17-c758a686/iconvdata/ibm943.c +++ glibc-2.17-c758a686/iconvdata/ibm943.c @@ -75,11 +75,12 @@ } \ \ ch = (ch * 0x100) + inptr[1]; \ + /* ch was less than 0xfd. */ \ + assert (ch < 0xfd00); \ while (ch > rp2->end) \ ++rp2; \ \ - if (__builtin_expect (rp2 == NULL, 0) \ - || __builtin_expect (ch < rp2->start, 0) \ + if (__builtin_expect (ch < rp2->start, 0) \ || (res = __ibm943db_to_ucs4[ch + rp2->idx], \ __builtin_expect (res, '\1') == 0 && ch !=0)) \ { \ diff --git glibc-2.17-c758a686/iconvdata/run-iconv-test.sh glibc-2.17-c758a686/iconvdata/run-iconv-test.sh index c98c929..5dfb69f 100755 --- glibc-2.17-c758a686/iconvdata/run-iconv-test.sh +++ glibc-2.17-c758a686/iconvdata/run-iconv-test.sh @@ -184,6 +184,24 @@ while read utf8 from filename; do done < TESTS2 +# Check for crashes in decoders. +printf '\016\377\377\377\377\377\377\377' > $temp1 +for from in $iconv_modules ; do + echo $ac_n "test decoder $from $ac_c" + PROG=`eval echo $ICONV` + if $PROG < $temp1 >/dev/null 2>&1 ; then + : # fall through + else + status=$? + if test $status -gt 1 ; then + echo "/FAILED" + failed=1 + continue + fi + fi + echo "OK" +done + exit $failed # Local Variables: # mode:shell-script