diff options
| -rw-r--r-- | ChangeLog | 6 | ||||
| -rw-r--r-- | ext/date/date_strftime.c | 9 | ||||
| -rw-r--r-- | test/date/test_date_strftime.rb | 8 |
3 files changed, 21 insertions, 2 deletions
@@ -1,3 +1,9 @@ +Tue Jun 14 22:07:25 2016 Nobuyoshi Nakada <nobu@ruby-lang.org> + + * ext/date/date_strftime.c (date_strftime_with_tmx): reject too + large precision to get rid of buffer overflow. + reported by Guido Vranken <guido AT guidovranken.nl>. + Tue Jun 14 21:40:42 2016 Kazuki Yamaguchi <k@rhe.jp> * ext/openssl/ossl_ocsp.c (ossl_ocspbres_to_der, ossl_ocspcid_to_der): diff --git a/ext/date/date_strftime.c b/ext/date/date_strftime.c index 20931a3124..9d8167b612 100644 --- a/ext/date/date_strftime.c +++ b/ext/date/date_strftime.c @@ -48,7 +48,7 @@ downcase(char *s, size_t i) /* strftime --- produce formatted time */ static size_t -date_strftime_with_tmx(char *s, size_t maxsize, const char *format, +date_strftime_with_tmx(char *s, const size_t maxsize, const char *format, const struct tmx *tmx) { char *endp = s + maxsize; @@ -575,7 +575,12 @@ date_strftime_with_tmx(char *s, size_t maxsize, const char *format, case '5': case '6': case '7': case '8': case '9': { char *e; - precision = (int)strtoul(format, &e, 10); + unsigned long prec = strtoul(format, &e, 10); + if (prec > INT_MAX || prec > maxsize) { + errno = ERANGE; + return 0; + } + precision = (int)prec; format = e - 1; goto again; } diff --git a/test/date/test_date_strftime.rb b/test/date/test_date_strftime.rb index 7472a4323d..1c0f9b11b4 100644 --- a/test/date/test_date_strftime.rb +++ b/test/date/test_date_strftime.rb @@ -420,4 +420,12 @@ class TestDateStrftime < Test::Unit::TestCase end + def test_overflow + assert_raise(ArgumentError, Errno::ERANGE) { + Date.new(2000,1,1).strftime("%2147483647c") + } + assert_raise(ArgumentError, Errno::ERANGE) { + DateTime.new(2000,1,1).strftime("%2147483647c") + } + end end |