From a4557ae3b4bc25c6317de9e21942ade67519c1e4 Mon Sep 17 00:00:00 2001
From: Tim Ruehsen <tim.ruehsen@gmx.de>
Date: Tue, 19 Aug 2014 21:01:28 +0200
Subject: [PATCH 1/2] cookies: only use full host matches for hosts used as IP
address
By not detecting and rejecting domain names for partial literal IP
addresses properly when parsing received HTTP cookies, libcurl can be
fooled to both send cookies to wrong sites and to allow arbitrary sites
to set cookies for others.
CVE-2014-3613
Bug: http://curl.haxx.se/docs/adv_20140910A.html
Upstream-commit: 8a75dbeb2305297640453029b7905ef51b87e8dd
Signed-off-by: Kamil Dudka <kdudka@redhat.com>
---
lib/cookie.c | 50 ++++++++++++++++++++++++++++++++++++++----------
tests/data/test1105 | 3 +--
tests/data/test31 | 55 +++++++++++++++++++++++++++--------------------------
tests/data/test8 | 3 ++-
4 files changed, 71 insertions(+), 40 deletions(-)
diff --git a/lib/cookie.c b/lib/cookie.c
index 0590643..46904ac 100644
--- a/lib/cookie.c
+++ b/lib/cookie.c
@@ -95,6 +95,7 @@ Example set of cookies:
#include "strtoofft.h"
#include "rawstr.h"
#include "curl_memrchr.h"
+#include "inet_pton.h"
/* The last #include file should be: */
#include "memdebug.h"
@@ -319,6 +320,28 @@ static void remove_expired(struct CookieInfo *cookies)
}
}
+/*
+ * Return true if the given string is an IP(v4|v6) address.
+ */
+static bool isip(const char *domain)
+{
+ struct in_addr addr;
+#ifdef ENABLE_IPV6
+ struct in6_addr addr6;
+#endif
+
+ if(Curl_inet_pton(AF_INET, domain, &addr)
+#ifdef ENABLE_IPV6
+ || Curl_inet_pton(AF_INET6, domain, &addr6)
+#endif
+ ) {
+ /* domain name given as IP address */
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
/****************************************************************************
*
* Curl_cookie_add()
@@ -439,24 +462,27 @@ Curl_cookie_add(struct SessionHandle *data,
}
}
else if(Curl_raw_equal("domain", name)) {
+ bool is_ip;
+
/* Now, we make sure that our host is within the given domain,
or the given domain is not valid and thus cannot be set. */
if('.' == whatptr[0])
whatptr++; /* ignore preceding dot */
- if(!domain || tailmatch(whatptr, domain)) {
- const char *tailptr=whatptr;
- if(tailptr[0] == '.')
- tailptr++;
- strstore(&co->domain, tailptr); /* don't prefix w/dots
- internally */
+ is_ip = isip(domain ? domain : whatptr);
+
+ if(!domain
+ || (is_ip && !strcmp(whatptr, domain))
+ || (!is_ip && tailmatch(whatptr, domain))) {
+ strstore(&co->domain, whatptr);
if(!co->domain) {
badcookie = TRUE;
break;
}
- co->tailmatch=TRUE; /* we always do that if the domain name was
- given */
+ if(!is_ip)
+ co->tailmatch=TRUE; /* we always do that if the domain name was
+ given */
}
else {
/* we did not get a tailmatch and then the attempted set domain
@@ -968,6 +994,7 @@ struct Cookie *Curl_cookie_getlist(struct CookieInfo *c,
time_t now = time(NULL);
struct Cookie *mainco=NULL;
size_t matches = 0;
+ bool is_ip;
if(!c || !c->cookies)
return NULL; /* no cookie struct or no cookies in the struct */
@@ -975,6 +1002,9 @@ struct Cookie *Curl_cookie_getlist(struct CookieInfo *c,
/* at first, remove expired cookies */
remove_expired(c);
+ /* check if host is an IP(v4|v6) address */
+ is_ip = isip(host);
+
co = c->cookies;
while(co) {
@@ -986,8 +1016,8 @@ struct Cookie *Curl_cookie_getlist(struct CookieInfo *c,
/* now check if the domain is correct */
if(!co->domain ||
- (co->tailmatch && tailmatch(co->domain, host)) ||
- (!co->tailmatch && Curl_raw_equal(host, co->domain)) ) {
+ (co->tailmatch && !is_ip && tailmatch(co->domain, host)) ||
+ ((!co->tailmatch || is_ip) && Curl_raw_equal(host, co->domain)) ) {
/* the right part of the host matches the domain stuff in the
cookie data */
diff --git a/tests/data/test1105 b/tests/data/test1105
index 25f194c..9564775 100644
--- a/tests/data/test1105
+++ b/tests/data/test1105
@@ -59,8 +59,7 @@ userid=myname&password=mypassword
# This file was generated by libcurl! Edit at your own risk.
127.0.0.1 FALSE /we/want/ FALSE 0 foobar name
-.127.0.0.1 TRUE "/silly/" FALSE 0 mismatch this
-.0.0.1 TRUE / FALSE 0 partmatch present
+127.0.0.1 FALSE "/silly/" FALSE 0 mismatch this
</file>
</verify>
</testcase>
diff --git a/tests/data/test31 b/tests/data/test31
index 38af83b..dfcac04 100644
--- a/tests/data/test31
+++ b/tests/data/test31
@@ -51,7 +51,8 @@ Set-Cookie: novalue; domain=reallysilly
Set-Cookie: test=yes; domain=foo.com; expires=Sat Feb 2 11:56:27 GMT 2030
Set-Cookie: test2=yes; domain=se; expires=Sat Feb 2 11:56:27 GMT 2030
Set-Cookie: magic=yessir; path=/silly/; HttpOnly
-Set-Cookie: blexp=yesyes; domain=.0.0.1; domain=.0.0.1; expiry=totally bad;
+Set-Cookie: blexp=yesyes; domain=127.0.0.1; domain=127.0.0.1; expiry=totally bad;
+Set-Cookie: partialip=nono; domain=.0.0.1;
boo
</data>
@@ -95,34 +96,34 @@ Accept: */*
# http://curl.haxx.se/docs/http-cookies.html
# This file was generated by libcurl! Edit at your own risk.
-.127.0.0.1 TRUE /silly/ FALSE 0 ismatch this
-.127.0.0.1 TRUE /overwrite FALSE 0 overwrite this2
-.127.0.0.1 TRUE /secure1/ TRUE 0 sec1value secure1
-.127.0.0.1 TRUE /secure2/ TRUE 0 sec2value secure2
-.127.0.0.1 TRUE /secure3/ TRUE 0 sec3value secure3
-.127.0.0.1 TRUE /secure4/ TRUE 0 sec4value secure4
-.127.0.0.1 TRUE /secure5/ TRUE 0 sec5value secure5
-.127.0.0.1 TRUE /secure6/ TRUE 0 sec6value secure6
-.127.0.0.1 TRUE /secure7/ TRUE 0 sec7value secure7
-.127.0.0.1 TRUE /secure8/ TRUE 0 sec8value secure8
-.127.0.0.1 TRUE /secure9/ TRUE 0 secure very1
-#HttpOnly_.127.0.0.1 TRUE /p1/ FALSE 0 httpo1 value1
-#HttpOnly_.127.0.0.1 TRUE /p2/ FALSE 0 httpo2 value2
-#HttpOnly_.127.0.0.1 TRUE /p3/ FALSE 0 httpo3 value3
-#HttpOnly_.127.0.0.1 TRUE /p4/ FALSE 0 httpo4 value4
-#HttpOnly_.127.0.0.1 TRUE /p4/ FALSE 0 httponly myvalue1
-#HttpOnly_.127.0.0.1 TRUE /p4/ TRUE 0 httpandsec myvalue2
-#HttpOnly_.127.0.0.1 TRUE /p4/ TRUE 0 httpandsec2 myvalue3
-#HttpOnly_.127.0.0.1 TRUE /p4/ TRUE 0 httpandsec3 myvalue4
-#HttpOnly_.127.0.0.1 TRUE /p4/ TRUE 0 httpandsec4 myvalue5
-#HttpOnly_.127.0.0.1 TRUE /p4/ TRUE 0 httpandsec5 myvalue6
-#HttpOnly_.127.0.0.1 TRUE /p4/ TRUE 0 httpandsec6 myvalue7
-#HttpOnly_.127.0.0.1 TRUE /p4/ TRUE 0 httpandsec7 myvalue8
-#HttpOnly_.127.0.0.1 TRUE /p4/ TRUE 0 httpandsec8 myvalue9
-.127.0.0.1 TRUE / FALSE 0 partmatch present
+127.0.0.1 FALSE /silly/ FALSE 0 ismatch this
+127.0.0.1 FALSE /overwrite FALSE 0 overwrite this2
+127.0.0.1 FALSE /secure1/ TRUE 0 sec1value secure1
+127.0.0.1 FALSE /secure2/ TRUE 0 sec2value secure2
+127.0.0.1 FALSE /secure3/ TRUE 0 sec3value secure3
+127.0.0.1 FALSE /secure4/ TRUE 0 sec4value secure4
+127.0.0.1 FALSE /secure5/ TRUE 0 sec5value secure5
+127.0.0.1 FALSE /secure6/ TRUE 0 sec6value secure6
+127.0.0.1 FALSE /secure7/ TRUE 0 sec7value secure7
+127.0.0.1 FALSE /secure8/ TRUE 0 sec8value secure8
+127.0.0.1 FALSE /secure9/ TRUE 0 secure very1
+#HttpOnly_127.0.0.1 FALSE /p1/ FALSE 0 httpo1 value1
+#HttpOnly_127.0.0.1 FALSE /p2/ FALSE 0 httpo2 value2
+#HttpOnly_127.0.0.1 FALSE /p3/ FALSE 0 httpo3 value3
+#HttpOnly_127.0.0.1 FALSE /p4/ FALSE 0 httpo4 value4
+#HttpOnly_127.0.0.1 FALSE /p4/ FALSE 0 httponly myvalue1
+#HttpOnly_127.0.0.1 FALSE /p4/ TRUE 0 httpandsec myvalue2
+#HttpOnly_127.0.0.1 FALSE /p4/ TRUE 0 httpandsec2 myvalue3
+#HttpOnly_127.0.0.1 FALSE /p4/ TRUE 0 httpandsec3 myvalue4
+#HttpOnly_127.0.0.1 FALSE /p4/ TRUE 0 httpandsec4 myvalue5
+#HttpOnly_127.0.0.1 FALSE /p4/ TRUE 0 httpandsec5 myvalue6
+#HttpOnly_127.0.0.1 FALSE /p4/ TRUE 0 httpandsec6 myvalue7
+#HttpOnly_127.0.0.1 FALSE /p4/ TRUE 0 httpandsec7 myvalue8
+#HttpOnly_127.0.0.1 FALSE /p4/ TRUE 0 httpandsec8 myvalue9
+127.0.0.1 FALSE / FALSE 0 partmatch present
127.0.0.1 FALSE /we/want/ FALSE 2054030187 nodomain value
#HttpOnly_127.0.0.1 FALSE /silly/ FALSE 0 magic yessir
-.0.0.1 TRUE /we/want/ FALSE 0 blexp yesyes
+127.0.0.1 FALSE /we/want/ FALSE 0 blexp yesyes
</file>
</verify>
</testcase>
diff --git a/tests/data/test8 b/tests/data/test8
index 4d54541..030fd55 100644
--- a/tests/data/test8
+++ b/tests/data/test8
@@ -42,7 +42,8 @@ Set-Cookie: duplicate=test; domain=.0.0.1; domain=.0.0.1; path=/donkey;
Set-Cookie: cookie=yes; path=/we;
Set-Cookie: cookie=perhaps; path=/we/want;
Set-Cookie: nocookie=yes; path=/WE;
-Set-Cookie: blexp=yesyes; domain=.0.0.1; domain=.0.0.1; expiry=totally bad;
+Set-Cookie: blexp=yesyes; domain=%HOSTIP; domain=%HOSTIP; expiry=totally bad;
+Set-Cookie: partialip=nono; domain=.0.0.1;
</file>
<precheck>
--
2.1.0