From 5ceda5fa61a87015275ab94f99da4f92f49ac802 Mon Sep 17 00:00:00 2001 From: Kamil Dudka Date: Fri, 12 Apr 2013 16:49:32 +0200 Subject: [PATCH 1/3] test1216: test tailmatching cookie domains This test is an attempt to repeat the problem YAMADA Yasuharu reported at http://curl.haxx.se/mail/lib-2013-04/0108.html Conflicts: tests/data/Makefile.am Signed-off-by: Kamil Dudka --- tests/data/Makefile.am | 2 +- tests/data/Makefile.in | 2 +- tests/data/test1216 | 62 ++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 64 insertions(+), 2 deletions(-) create mode 100644 tests/data/test1216 diff --git a/tests/data/Makefile.am b/tests/data/Makefile.am index 372f127..9321d61 100644 --- a/tests/data/Makefile.am +++ b/tests/data/Makefile.am @@ -78,7 +78,7 @@ test1118 test1119 test1120 test1121 test1122 test1123 test1124 test1125 \ test1126 test1127 test1128 test1129 test1130 test1131 \ test1200 test1201 test1202 test1203 test1204 test1205 test1206 test1207 \ test1208 test1209 test1210 test1211 \ -test1220 \ +test1220 test1216 \ test1300 test1301 test1302 test1303 test1304 test1305 \ test1306 test1307 test1308 test1309 test1310 test1311 test1312 test1313 \ test1314 test1315 test1316 test1317 test1318 test1319 test1320 test1321 \ diff --git a/tests/data/Makefile.in b/tests/data/Makefile.in index e0a554a..0c18cb5 100644 --- a/tests/data/Makefile.in +++ b/tests/data/Makefile.in @@ -343,7 +343,7 @@ test1118 test1119 test1120 test1121 test1122 test1123 test1124 test1125 \ test1126 test1127 test1128 test1129 test1130 test1131 \ test1200 test1201 test1202 test1203 test1204 test1205 test1206 test1207 \ test1208 test1209 test1210 test1211 \ -test1220 \ +test1220 test1216 \ test1300 test1301 test1302 test1303 test1304 test1305 \ test1306 test1307 test1308 test1309 test1310 test1311 test1312 test1313 \ test1314 test1315 test1316 test1317 test1318 test1319 test1320 test1321 \ diff --git a/tests/data/test1216 b/tests/data/test1216 new file mode 100644 index 0000000..e63fe92 --- /dev/null +++ b/tests/data/test1216 @@ -0,0 +1,62 @@ + + + +HTTP +HTTP GET +HTTP proxy +cookies + + + +# Server-side + + +HTTP/1.1 200 OK +Server: Microsoft-IIS/4.0 +Date: Tue, 25 Sep 2001 19:37:44 GMT +Content-Type: text/html +Connection: close +Content-Length: 21 + +This server says moo + + + +# Client-side + + +http + + +HTTP cookie domains tailmatching the host name + + +http://example.fake/c/1216 http://bexample.fake/c/1216 -b log/injar1216 -x %HOSTIP:%HTTPPORT + + +example.fake FALSE /a FALSE 2139150993 mooo indeed +example.fake FALSE /b FALSE 0 moo1 indeed +example.fake FALSE /c FALSE 2139150993 moo2 indeed + + + +# Verify data after the test has been "shot" + + +^User-Agent:.* + + +GET http://example.fake/c/1216 HTTP/1.1 +Host: example.fake +Accept: */* +Proxy-Connection: Keep-Alive +Cookie: moo2=indeed + +GET http://bexample.fake/c/1216 HTTP/1.1 +Host: bexample.fake +Accept: */* +Proxy-Connection: Keep-Alive + + + + -- 1.7.1 From 3cf21844356a152df3af92530bb607ef880588af Mon Sep 17 00:00:00 2001 From: YAMADA Yasuharu Date: Thu, 11 Apr 2013 00:17:15 +0200 Subject: [PATCH 2/3] cookie: fix tailmatching to prevent cross-domain leakage Cookies set for 'example.com' could accidentaly also be sent by libcurl to the 'bexample.com' (ie with a prefix to the first domain name). This is a security vulnerabilty, CVE-2013-1944. Bug: http://curl.haxx.se/docs/adv_20130412.html Signed-off-by: Kamil Dudka --- lib/cookie.c | 24 +++++++++++++++++++----- 1 files changed, 19 insertions(+), 5 deletions(-) diff --git a/lib/cookie.c b/lib/cookie.c index 644b33a..760a931 100644 --- a/lib/cookie.c +++ b/lib/cookie.c @@ -118,15 +118,29 @@ static void freecookie(struct Cookie *co) free(co); } -static bool tailmatch(const char *little, const char *bigone) +static bool tailmatch(const char *cooke_domain, const char *hostname) { - size_t littlelen = strlen(little); - size_t biglen = strlen(bigone); + size_t cookie_domain_len = strlen(cooke_domain); + size_t hostname_len = strlen(hostname); - if(littlelen > biglen) + if(hostname_len < cookie_domain_len) return FALSE; - return Curl_raw_equal(little, bigone+biglen-littlelen) ? TRUE : FALSE; + if(!Curl_raw_equal(cooke_domain, hostname+hostname_len-cookie_domain_len)) + return FALSE; + + /* A lead char of cookie_domain is not '.'. + RFC6265 4.1.2.3. The Domain Attribute says: + For example, if the value of the Domain attribute is + "example.com", the user agent will include the cookie in the Cookie + header when making HTTP requests to example.com, www.example.com, and + www.corp.example.com. + */ + if(hostname_len == cookie_domain_len) + return TRUE; + if('.' == *(hostname + hostname_len - cookie_domain_len - 1)) + return TRUE; + return FALSE; } /* -- 1.7.1 From cb95277d4732d7e9a50df7cca2ce0aa8dc0aa5b9 Mon Sep 17 00:00:00 2001 From: Kamil Dudka Date: Fri, 12 Apr 2013 16:50:11 +0200 Subject: [PATCH 3/3] test1218: another cookie tailmatch test These tests verify commit 3604fde3d3c9b0d, the fix for the "cookie domain tailmatch" vulnerability. See http://curl.haxx.se/docs/adv_20130412.html Conflicts: tests/data/Makefile.am Signed-off-by: Kamil Dudka --- tests/data/Makefile.am | 2 +- tests/data/Makefile.in | 2 +- tests/data/test1218 | 61 ++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 63 insertions(+), 2 deletions(-) create mode 100644 tests/data/test1218 diff --git a/tests/data/Makefile.am b/tests/data/Makefile.am index 9321d61..c8295c3 100644 --- a/tests/data/Makefile.am +++ b/tests/data/Makefile.am @@ -78,7 +78,7 @@ test1118 test1119 test1120 test1121 test1122 test1123 test1124 test1125 \ test1126 test1127 test1128 test1129 test1130 test1131 \ test1200 test1201 test1202 test1203 test1204 test1205 test1206 test1207 \ test1208 test1209 test1210 test1211 \ -test1220 test1216 \ +test1220 test1216 test1218 \ test1300 test1301 test1302 test1303 test1304 test1305 \ test1306 test1307 test1308 test1309 test1310 test1311 test1312 test1313 \ test1314 test1315 test1316 test1317 test1318 test1319 test1320 test1321 \ diff --git a/tests/data/Makefile.in b/tests/data/Makefile.in index 0c18cb5..96678cd 100644 --- a/tests/data/Makefile.in +++ b/tests/data/Makefile.in @@ -343,7 +343,7 @@ test1118 test1119 test1120 test1121 test1122 test1123 test1124 test1125 \ test1126 test1127 test1128 test1129 test1130 test1131 \ test1200 test1201 test1202 test1203 test1204 test1205 test1206 test1207 \ test1208 test1209 test1210 test1211 \ -test1220 test1216 \ +test1220 test1216 test1218 \ test1300 test1301 test1302 test1303 test1304 test1305 \ test1306 test1307 test1308 test1309 test1310 test1311 test1312 test1313 \ test1314 test1315 test1316 test1317 test1318 test1319 test1320 test1321 \ diff --git a/tests/data/test1218 b/tests/data/test1218 new file mode 100644 index 0000000..7d86547 --- /dev/null +++ b/tests/data/test1218 @@ -0,0 +1,61 @@ + + + +HTTP +HTTP GET +HTTP proxy +cookies + + + +# This test is very similar to 1216, only that it sets the cookies from the +# first site instead of reading from a file + + +HTTP/1.1 200 OK +Date: Tue, 25 Sep 2001 19:37:44 GMT +Set-Cookie: domain=.example.fake; bug=fixed; +Content-Length: 21 + +This server says moo + + + +# Client-side + + +http + + +HTTP cookies and domains with same prefix + + +http://example.fake/c/1218 http://example.fake/c/1218 http://bexample.fake/c/1218 -b nonexisting -x %HOSTIP:%HTTPPORT + + + +# Verify data after the test has been "shot" + + +^User-Agent:.* + + +GET http://example.fake/c/1218 HTTP/1.1 +Host: example.fake +Accept: */* +Proxy-Connection: Keep-Alive + +GET http://example.fake/c/1218 HTTP/1.1 +Host: example.fake +Accept: */* +Proxy-Connection: Keep-Alive +Cookie: bug=fixed + +GET http://bexample.fake/c/1218 HTTP/1.1 +Host: bexample.fake +Accept: */* +Proxy-Connection: Keep-Alive + + + + -- 1.7.1