From a42c5771e96df7250097351326ab9fa482a1bc35 Mon Sep 17 00:00:00 2001 From: Remi Collet Date: Wed, 3 Feb 2021 12:53:43 +0100 Subject: Fix #80672 Null Dereference in SoapClient CVE-2021-21702 better fix for #77423 --- php-bug77423.patch | 223 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 223 insertions(+) (limited to 'php-bug77423.patch') diff --git a/php-bug77423.patch b/php-bug77423.patch index 668adac..cfd971f 100644 --- a/php-bug77423.patch +++ b/php-bug77423.patch @@ -207,3 +207,226 @@ index 7ca1c46721..43e3b8faf3 100644 -- 2.29.2 +From b837c01d4cd290d87d2dd4c2d1195e9f209fe749 Mon Sep 17 00:00:00 2001 +From: "Christoph M. Becker" +Date: Tue, 19 Jan 2021 11:23:25 +0100 +Subject: [PATCH] Alternative fix for bug 77423 + +That bug report originally was about `parse_url()` misbehaving, but the +security aspect was actually only regarding `FILTER_VALIDATE_URL`. +Since the changes to `parse_url_ex()` apparently affect userland code +which is relying on the sloppy URL parsing[1], this alternative +restores the old parsing behavior, but ensures that the userinfo is +checked for correctness for `FILTER_VALIDATE_URL`. + +[1] + +(cherry picked from commit 4a89e726bd4d0571991dc22a9a1ad4509e8fe347) +(cherry picked from commit 9c673083cd46ee2a954a62156acbe4b6e657c048) +(cherry picked from commit 356f7008f36da60ec9794d48c55d117f1dd31903) +(cherry picked from commit b5d4f109bab648c0d07273d2a52a5f2560e7832b) +(cherry picked from commit efb6c49f08314aca84733b0e83d72cd20c8e0015) +--- + ext/filter/logical_filters.c | 25 +++++++++++++++++++ + .../tests/url => filter/tests}/bug77423.phpt | 15 ----------- + ext/standard/tests/strings/url_t.phpt | 6 +++-- + .../tests/url/parse_url_basic_001.phpt | 6 +++-- + .../tests/url/parse_url_basic_003.phpt | 2 +- + .../tests/url/parse_url_basic_005.phpt | 2 +- + ext/standard/url.c | 21 ---------------- + 7 files changed, 35 insertions(+), 42 deletions(-) + rename ext/{standard/tests/url => filter/tests}/bug77423.phpt (53%) + +diff --git a/ext/filter/logical_filters.c b/ext/filter/logical_filters.c +index 39a035f3af..9e1daffaab 100644 +--- a/ext/filter/logical_filters.c ++++ b/ext/filter/logical_filters.c +@@ -445,6 +445,24 @@ void php_filter_validate_regexp(PHP_INPUT_FILTER_PARAM_DECL) /* {{{ */ + } + /* }}} */ + ++static int is_userinfo_valid(char *str) ++{ ++ const char *valid = "-._~!$&'()*+,;=:"; ++ const char *p = str; ++ size_t len = strlen(str); ++ ++ while (p - str < len) { ++ if (isalpha(*p) || isdigit(*p) || strchr(valid, *p)) { ++ p++; ++ } else if (*p == '%' && p - str <= len - 3 && isdigit(*(p+1)) && isxdigit(*(p+2))) { ++ p += 3; ++ } else { ++ return 0; ++ } ++ } ++ return 1; ++} ++ + void php_filter_validate_url(PHP_INPUT_FILTER_PARAM_DECL) /* {{{ */ + { + php_url *url; +@@ -496,6 +514,13 @@ bad_url: + php_url_free(url); + RETURN_VALIDATION_FAILED + } ++ ++ if (url->user != NULL && !is_userinfo_valid(url->user)) { ++ php_url_free(url); ++ RETURN_VALIDATION_FAILED ++ ++ } ++ + php_url_free(url); + } + /* }}} */ +diff --git a/ext/standard/tests/url/bug77423.phpt b/ext/filter/tests/bug77423.phpt +similarity index 53% +rename from ext/standard/tests/url/bug77423.phpt +rename to ext/filter/tests/bug77423.phpt +index be03fe95e2..761c7c359a 100644 +--- a/ext/standard/tests/url/bug77423.phpt ++++ b/ext/filter/tests/bug77423.phpt +@@ -8,23 +8,8 @@ $urls = array( + ); + foreach ($urls as $url) { + var_dump(filter_var($url, FILTER_VALIDATE_URL)); +- var_dump(parse_url($url)); + } + ?> + --EXPECT-- + bool(false) +-array(3) { +- ["scheme"]=> +- string(4) "http" +- ["host"]=> +- string(19) "php.net\@aliyun.com" +- ["path"]=> +- string(7) "/aaa.do" +-} + bool(false) +-array(2) { +- ["scheme"]=> +- string(5) "https" +- ["host"]=> +- string(26) "example.com\uFF03@bing.com" +-} +diff --git a/ext/standard/tests/strings/url_t.phpt b/ext/standard/tests/strings/url_t.phpt +index 80e164a08e..e172061ec2 100644 +--- a/ext/standard/tests/strings/url_t.phpt ++++ b/ext/standard/tests/strings/url_t.phpt +@@ -575,13 +575,15 @@ $sample_urls = array ( + string(16) "some_page_ref123" + } + +---> http://secret@hideout@www.php.net:80/index.php?test=1&test2=char&test3=mixesCI#some_page_ref123: array(6) { ++--> http://secret@hideout@www.php.net:80/index.php?test=1&test2=char&test3=mixesCI#some_page_ref123: array(7) { + ["scheme"]=> + string(4) "http" + ["host"]=> +- string(26) "secret@hideout@www.php.net" ++ string(11) "www.php.net" + ["port"]=> + int(80) ++ ["user"]=> ++ string(14) "secret@hideout" + ["path"]=> + string(10) "/index.php" + ["query"]=> +diff --git a/ext/standard/tests/url/parse_url_basic_001.phpt b/ext/standard/tests/url/parse_url_basic_001.phpt +index c9e9d32de0..e468066a42 100644 +--- a/ext/standard/tests/url/parse_url_basic_001.phpt ++++ b/ext/standard/tests/url/parse_url_basic_001.phpt +@@ -507,13 +507,15 @@ echo "Done"; + string(16) "some_page_ref123" + } + +---> http://secret@hideout@www.php.net:80/index.php?test=1&test2=char&test3=mixesCI#some_page_ref123: array(6) { ++--> http://secret@hideout@www.php.net:80/index.php?test=1&test2=char&test3=mixesCI#some_page_ref123: array(7) { + ["scheme"]=> + string(4) "http" + ["host"]=> +- string(26) "secret@hideout@www.php.net" ++ string(11) "www.php.net" + ["port"]=> + int(80) ++ ["user"]=> ++ string(14) "secret@hideout" + ["path"]=> + string(10) "/index.php" + ["query"]=> +diff --git a/ext/standard/tests/url/parse_url_basic_003.phpt b/ext/standard/tests/url/parse_url_basic_003.phpt +index 431de27009..70dc4bb90b 100644 +--- a/ext/standard/tests/url/parse_url_basic_003.phpt ++++ b/ext/standard/tests/url/parse_url_basic_003.phpt +@@ -68,7 +68,7 @@ echo "Done"; + --> http://secret:@www.php.net/index.php?test=1&test2=char&test3=mixesCI#some_page_ref123 : string(11) "www.php.net" + --> http://:hideout@www.php.net:80/index.php?test=1&test2=char&test3=mixesCI#some_page_ref123 : string(11) "www.php.net" + --> http://secret:hideout@www.php.net/index.php?test=1&test2=char&test3=mixesCI#some_page_ref123 : string(11) "www.php.net" +---> http://secret@hideout@www.php.net:80/index.php?test=1&test2=char&test3=mixesCI#some_page_ref123 : string(26) "secret@hideout@www.php.net" ++--> http://secret@hideout@www.php.net:80/index.php?test=1&test2=char&test3=mixesCI#some_page_ref123 : string(11) "www.php.net" + --> http://secret:hid:out@www.php.net:80/index.php?test=1&test2=char&test3=mixesCI#some_page_ref123 : string(11) "www.php.net" + --> nntp://news.php.net : string(12) "news.php.net" + --> ftp://ftp.gnu.org/gnu/glic/glibc.tar.gz : string(11) "ftp.gnu.org" +diff --git a/ext/standard/tests/url/parse_url_basic_005.phpt b/ext/standard/tests/url/parse_url_basic_005.phpt +index b2c1a1d6dd..b2ca06ff96 100644 +--- a/ext/standard/tests/url/parse_url_basic_005.phpt ++++ b/ext/standard/tests/url/parse_url_basic_005.phpt +@@ -68,7 +68,7 @@ echo "Done"; + --> http://secret:@www.php.net/index.php?test=1&test2=char&test3=mixesCI#some_page_ref123 : string(6) "secret" + --> http://:hideout@www.php.net:80/index.php?test=1&test2=char&test3=mixesCI#some_page_ref123 : string(0) "" + --> http://secret:hideout@www.php.net/index.php?test=1&test2=char&test3=mixesCI#some_page_ref123 : string(6) "secret" +---> http://secret@hideout@www.php.net:80/index.php?test=1&test2=char&test3=mixesCI#some_page_ref123 : NULL ++--> http://secret@hideout@www.php.net:80/index.php?test=1&test2=char&test3=mixesCI#some_page_ref123 : string(14) "secret@hideout" + --> http://secret:hid:out@www.php.net:80/index.php?test=1&test2=char&test3=mixesCI#some_page_ref123 : string(6) "secret" + --> nntp://news.php.net : NULL + --> ftp://ftp.gnu.org/gnu/glic/glibc.tar.gz : NULL +diff --git a/ext/standard/url.c b/ext/standard/url.c +index 8da9da3d6a..0278bd47e8 100644 +--- a/ext/standard/url.c ++++ b/ext/standard/url.c +@@ -92,22 +92,6 @@ PHPAPI php_url *php_url_parse(char const *str) + return php_url_parse_ex(str, strlen(str)); + } + +-static int is_userinfo_valid(const char *str, size_t len) +-{ +- char *valid = "-._~!$&'()*+,;=:"; +- char *p = str; +- while (p - str < len) { +- if (isalpha(*p) || isdigit(*p) || strchr(valid, *p)) { +- p++; +- } else if (*p == '%' && p - str <= len - 3 && isdigit(*(p+1)) && isxdigit(*(p+2))) { +- p += 3; +- } else { +- return 0; +- } +- } +- return 1; +-} +- + /* {{{ php_url_parse + */ + PHPAPI php_url *php_url_parse_ex(char const *str, int length) +@@ -246,18 +230,13 @@ PHPAPI php_url *php_url_parse_ex(char const *str, int length) + ret->pass = estrndup(pp, (p-pp)); + php_replace_controlchars_ex(ret->pass, (p-pp)); + } else { +- if (!is_userinfo_valid(s, p-s)) { +- goto check_port; +- } + ret->user = estrndup(s, (p-s)); + php_replace_controlchars_ex(ret->user, (p-s)); +- + } + + s = p + 1; + } + +-check_port: + /* check for port */ + if (s < ue && *s == '[' && *(e-1) == ']') { + /* Short circuit portscan, +-- +2.29.2 + -- cgit