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nixpkgs/pkgs/tools/networking/curl/CVE-2021-22901.patch

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Based on upstream 7f4a9a9b2a49547eae24d2e19bc5c346e9026479, modified by ris to
apply without 0c55fbab45bedb761766109d41c3da49c4bc66c6
diff --git a/lib/multi.c b/lib/multi.c
index 54365f399e9b..1b3e261c682a 100644
--- a/lib/multi.c
+++ b/lib/multi.c
@@ -878,8 +878,10 @@ bool Curl_multiplex_wanted(const struct Curl_multi *multi)
void Curl_detach_connnection(struct Curl_easy *data)
{
struct connectdata *conn = data->conn;
- if(conn)
+ if(conn) {
Curl_llist_remove(&conn->easyq, &data->conn_queue, NULL);
+ Curl_ssl_detach_conn(data, conn);
+ }
data->conn = NULL;
}
@@ -896,6 +898,7 @@ void Curl_attach_connnection(struct Curl_easy *data,
data->conn = conn;
Curl_llist_insert_next(&conn->easyq, conn->easyq.tail, data,
&data->conn_queue);
+ Curl_ssl_associate_conn(data, conn);
}
static int waitconnect_getsock(struct connectdata *conn,
diff --git a/lib/vtls/gskit.c b/lib/vtls/gskit.c
index c648f624579b..ca953769d1ba 100644
--- a/lib/vtls/gskit.c
+++ b/lib/vtls/gskit.c
@@ -1304,7 +1304,9 @@ const struct Curl_ssl Curl_ssl_gskit = {
Curl_none_set_engine_default, /* set_engine_default */
Curl_none_engines_list, /* engines_list */
Curl_none_false_start, /* false_start */
- NULL /* sha256sum */
+ NULL, /* sha256sum */
+ NULL, /* associate_connection */
+ NULL /* disassociate_connection */
};
#endif /* USE_GSKIT */
diff --git a/lib/vtls/gtls.c b/lib/vtls/gtls.c
index a10c0dbcca05..ecde5c44deeb 100644
--- a/lib/vtls/gtls.c
+++ b/lib/vtls/gtls.c
@@ -1656,7 +1656,9 @@ const struct Curl_ssl Curl_ssl_gnutls = {
Curl_none_set_engine_default, /* set_engine_default */
Curl_none_engines_list, /* engines_list */
Curl_none_false_start, /* false_start */
- gtls_sha256sum /* sha256sum */
+ gtls_sha256sum, /* sha256sum */
+ NULL, /* associate_connection */
+ NULL /* disassociate_connection */
};
#endif /* USE_GNUTLS */
diff --git a/lib/vtls/mbedtls.c b/lib/vtls/mbedtls.c
index ca77de58667c..3a0be0f04b4f 100644
--- a/lib/vtls/mbedtls.c
+++ b/lib/vtls/mbedtls.c
@@ -1093,7 +1093,9 @@ const struct Curl_ssl Curl_ssl_mbedtls = {
Curl_none_set_engine_default, /* set_engine_default */
Curl_none_engines_list, /* engines_list */
Curl_none_false_start, /* false_start */
- mbedtls_sha256sum /* sha256sum */
+ mbedtls_sha256sum, /* sha256sum */
+ NULL, /* associate_connection */
+ NULL /* disassociate_connection */
};
#endif /* USE_MBEDTLS */
diff --git a/lib/vtls/mesalink.c b/lib/vtls/mesalink.c
index f16c77c27fe0..bf8600d3230b 100644
--- a/lib/vtls/mesalink.c
+++ b/lib/vtls/mesalink.c
@@ -666,7 +666,9 @@ const struct Curl_ssl Curl_ssl_mesalink = {
Curl_none_set_engine_default, /* set_engine_default */
Curl_none_engines_list, /* engines_list */
Curl_none_false_start, /* false_start */
- NULL /* sha256sum */
+ NULL, /* sha256sum */
+ NULL, /* associate_connection */
+ NULL /* disassociate_connection */
};
#endif
diff --git a/lib/vtls/nss.c b/lib/vtls/nss.c
index 2aa4bdaa134f..1582b1e580a9 100644
--- a/lib/vtls/nss.c
+++ b/lib/vtls/nss.c
@@ -2465,7 +2465,9 @@ const struct Curl_ssl Curl_ssl_nss = {
Curl_none_set_engine_default, /* set_engine_default */
Curl_none_engines_list, /* engines_list */
nss_false_start, /* false_start */
- nss_sha256sum /* sha256sum */
+ nss_sha256sum, /* sha256sum */
+ NULL, /* associate_connection */
+ NULL /* disassociate_connection */
};
#endif /* USE_NSS */
diff --git a/lib/vtls/openssl.c b/lib/vtls/openssl.c
index 1521600dd5f6..ebd7abc3b4ac 100644
--- a/lib/vtls/openssl.c
+++ b/lib/vtls/openssl.c
@@ -240,6 +240,10 @@ struct ssl_backend_data {
#endif
};
+static void ossl_associate_connection(struct Curl_easy *data,
+ struct connectdata *conn,
+ int sockindex);
+
/*
* Number of bytes to read from the random number seed file. This must be
* a finite value (because some entropy "files" like /dev/urandom have
@@ -2581,6 +2585,7 @@ static CURLcode ossl_connect_step1(struct Curl_easy *data,
curl_socket_t sockfd = conn->sock[sockindex];
struct ssl_connect_data *connssl = &conn->ssl[sockindex];
ctx_option_t ctx_options = 0;
+ void *ssl_sessionid = NULL;
#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
bool sni;
@@ -3225,46 +3230,23 @@ static CURLcode ossl_connect_step1(struct Curl_easy *data,
}
#endif
- /* Check if there's a cached ID we can/should use here! */
- if(SSL_SET_OPTION(primary.sessionid)) {
- void *ssl_sessionid = NULL;
- int data_idx = ossl_get_ssl_data_index();
- int connectdata_idx = ossl_get_ssl_conn_index();
- int sockindex_idx = ossl_get_ssl_sockindex_index();
- int proxy_idx = ossl_get_proxy_index();
-
- if(data_idx >= 0 && connectdata_idx >= 0 && sockindex_idx >= 0 &&
- proxy_idx >= 0) {
- /* Store the data needed for the "new session" callback.
- * The sockindex is stored as a pointer to an array element. */
- SSL_set_ex_data(backend->handle, data_idx, data);
- SSL_set_ex_data(backend->handle, connectdata_idx, conn);
- SSL_set_ex_data(backend->handle, sockindex_idx, conn->sock + sockindex);
-#ifndef CURL_DISABLE_PROXY
- SSL_set_ex_data(backend->handle, proxy_idx, SSL_IS_PROXY() ? (void *) 1:
- NULL);
-#else
- SSL_set_ex_data(backend->handle, proxy_idx, NULL);
-#endif
-
- }
+ ossl_associate_connection(data, conn, sockindex);
- Curl_ssl_sessionid_lock(data);
- if(!Curl_ssl_getsessionid(data, conn, SSL_IS_PROXY() ? TRUE : FALSE,
- &ssl_sessionid, NULL, sockindex)) {
- /* we got a session id, use it! */
- if(!SSL_set_session(backend->handle, ssl_sessionid)) {
- Curl_ssl_sessionid_unlock(data);
- failf(data, "SSL: SSL_set_session failed: %s",
- ossl_strerror(ERR_get_error(), error_buffer,
- sizeof(error_buffer)));
- return CURLE_SSL_CONNECT_ERROR;
- }
- /* Informational message */
- infof(data, "SSL re-using session ID\n");
+ Curl_ssl_sessionid_lock(data);
+ if(!Curl_ssl_getsessionid(data, conn, SSL_IS_PROXY() ? TRUE : FALSE,
+ &ssl_sessionid, NULL, sockindex)) {
+ /* we got a session id, use it! */
+ if(!SSL_set_session(backend->handle, ssl_sessionid)) {
+ Curl_ssl_sessionid_unlock(data);
+ failf(data, "SSL: SSL_set_session failed: %s",
+ ossl_strerror(ERR_get_error(), error_buffer,
+ sizeof(error_buffer)));
+ return CURLE_SSL_CONNECT_ERROR;
}
- Curl_ssl_sessionid_unlock(data);
+ /* Informational message */
+ infof(data, "SSL re-using session ID\n");
}
+ Curl_ssl_sessionid_unlock(data);
#ifndef CURL_DISABLE_PROXY
if(conn->proxy_ssl[sockindex].use) {
@@ -4498,6 +4480,90 @@ static void *ossl_get_internals(struct ssl_connect_data *connssl,
(void *)backend->ctx : (void *)backend->handle;
}
+static void ossl_associate_connection(struct Curl_easy *data,
+ struct connectdata *conn,
+ int sockindex)
+{
+ struct ssl_connect_data *connssl = &conn->ssl[sockindex];
+ struct ssl_backend_data *backend = connssl->backend;
+
+ /* If we don't have SSL context, do nothing. */
+ if(!backend->handle)
+ return;
+
+ if(SSL_SET_OPTION(primary.sessionid)) {
+ int data_idx = ossl_get_ssl_data_index();
+ int connectdata_idx = ossl_get_ssl_conn_index();
+ int sockindex_idx = ossl_get_ssl_sockindex_index();
+ int proxy_idx = ossl_get_proxy_index();
+
+ if(data_idx >= 0 && connectdata_idx >= 0 && sockindex_idx >= 0 &&
+ proxy_idx >= 0) {
+ /* Store the data needed for the "new session" callback.
+ * The sockindex is stored as a pointer to an array element. */
+ SSL_set_ex_data(backend->handle, data_idx, data);
+ SSL_set_ex_data(backend->handle, connectdata_idx, conn);
+ SSL_set_ex_data(backend->handle, sockindex_idx, conn->sock + sockindex);
+#ifndef CURL_DISABLE_PROXY
+ SSL_set_ex_data(backend->handle, proxy_idx, SSL_IS_PROXY() ? (void *) 1:
+ NULL);
+#else
+ SSL_set_ex_data(backend->handle, proxy_idx, NULL);
+#endif
+ }
+ }
+}
+
+/*
+ * Starting with TLS 1.3, the ossl_new_session_cb callback gets called after
+ * the handshake. If the transfer that sets up the callback gets killed before
+ * this callback arrives, we must make sure to properly clear the data to
+ * avoid UAF problems. A future optimization could be to instead store another
+ * transfer that might still be using the same connection.
+ */
+
+static void ossl_disassociate_connection(struct Curl_easy *data,
+ int sockindex)
+{
+ struct connectdata *conn = data->conn;
+ struct ssl_connect_data *connssl = &conn->ssl[sockindex];
+ struct ssl_backend_data *backend = connssl->backend;
+
+ /* If we don't have SSL context, do nothing. */
+ if(!backend->handle)
+ return;
+
+ if(SSL_SET_OPTION(primary.sessionid)) {
+ bool isproxy = FALSE;
+ bool incache;
+ void *old_ssl_sessionid = NULL;
+ int data_idx = ossl_get_ssl_data_index();
+ int connectdata_idx = ossl_get_ssl_conn_index();
+ int sockindex_idx = ossl_get_ssl_sockindex_index();
+ int proxy_idx = ossl_get_proxy_index();
+
+ if(data_idx >= 0 && connectdata_idx >= 0 && sockindex_idx >= 0 &&
+ proxy_idx >= 0) {
+ /* Invalidate the session cache entry, if any */
+ isproxy = SSL_get_ex_data(backend->handle, proxy_idx) ? TRUE : FALSE;
+
+ /* Disable references to data in "new session" callback to avoid
+ * accessing a stale pointer. */
+ SSL_set_ex_data(backend->handle, data_idx, NULL);
+ SSL_set_ex_data(backend->handle, connectdata_idx, NULL);
+ SSL_set_ex_data(backend->handle, sockindex_idx, NULL);
+ SSL_set_ex_data(backend->handle, proxy_idx, NULL);
+ }
+
+ Curl_ssl_sessionid_lock(data);
+ incache = !(Curl_ssl_getsessionid(data, conn, isproxy,
+ &old_ssl_sessionid, NULL, sockindex));
+ if(incache)
+ Curl_ssl_delsessionid(data, old_ssl_sessionid);
+ Curl_ssl_sessionid_unlock(data);
+ }
+}
+
const struct Curl_ssl Curl_ssl_openssl = {
{ CURLSSLBACKEND_OPENSSL, "openssl" }, /* info */
@@ -4533,10 +4599,12 @@ const struct Curl_ssl Curl_ssl_openssl = {
ossl_engines_list, /* engines_list */
Curl_none_false_start, /* false_start */
#if (OPENSSL_VERSION_NUMBER >= 0x0090800fL) && !defined(OPENSSL_NO_SHA256)
- ossl_sha256sum /* sha256sum */
+ ossl_sha256sum, /* sha256sum */
#else
- NULL /* sha256sum */
+ NULL, /* sha256sum */
#endif
+ ossl_associate_connection, /* associate_connection */
+ ossl_disassociate_connection /* disassociate_connection */
};
#endif /* USE_OPENSSL */
diff --git a/lib/vtls/rustls.c b/lib/vtls/rustls.c
index 9dfbd2c3c4c2..161f3bf51d75 100644
--- a/lib/vtls/rustls.c
+++ b/lib/vtls/rustls.c
@@ -604,7 +604,9 @@ const struct Curl_ssl Curl_ssl_rustls = {
Curl_none_set_engine_default, /* set_engine_default */
Curl_none_engines_list, /* engines_list */
Curl_none_false_start, /* false_start */
- NULL /* sha256sum */
+ NULL, /* sha256sum */
+ NULL, /* associate_connection */
+ NULL /* disassociate_connection */
};
#endif /* USE_RUSTLS */
diff --git a/lib/vtls/schannel.c b/lib/vtls/schannel.c
index dba7072273a9..2bcf11db2576 100644
--- a/lib/vtls/schannel.c
+++ b/lib/vtls/schannel.c
@@ -329,7 +329,7 @@ get_alg_id_by_name(char *name)
static CURLcode
set_ssl_ciphers(SCHANNEL_CRED *schannel_cred, char *ciphers,
- int *algIds)
+ ALG_ID *algIds)
{
char *startCur = ciphers;
int algCount = 0;
@@ -2433,7 +2433,9 @@ const struct Curl_ssl Curl_ssl_schannel = {
Curl_none_set_engine_default, /* set_engine_default */
Curl_none_engines_list, /* engines_list */
Curl_none_false_start, /* false_start */
- schannel_sha256sum /* sha256sum */
+ schannel_sha256sum, /* sha256sum */
+ NULL, /* associate_connection */
+ NULL /* disassociate_connection */
};
#endif /* USE_SCHANNEL */
diff --git a/lib/vtls/sectransp.c b/lib/vtls/sectransp.c
index 4276b89cfb3a..8b1e84ed7715 100644
--- a/lib/vtls/sectransp.c
+++ b/lib/vtls/sectransp.c
@@ -3453,6 +3453,8 @@ const struct Curl_ssl Curl_ssl_sectransp = {
Curl_none_engines_list, /* engines_list */
sectransp_false_start, /* false_start */
sectransp_sha256sum /* sha256sum */
+ NULL, /* associate_connection */
+ NULL /* disassociate_connection */
};
#ifdef __clang__
diff --git a/lib/vtls/vtls.c b/lib/vtls/vtls.c
index d63fd5c76386..65f4f773dd63 100644
--- a/lib/vtls/vtls.c
+++ b/lib/vtls/vtls.c
@@ -586,6 +586,25 @@ CURLcode Curl_ssl_addsessionid(struct Curl_easy *data,
return CURLE_OK;
}
+void Curl_ssl_associate_conn(struct Curl_easy *data,
+ struct connectdata *conn)
+{
+ if(Curl_ssl->associate_connection) {
+ Curl_ssl->associate_connection(data, conn, FIRSTSOCKET);
+ if(conn->sock[SECONDARYSOCKET] && conn->bits.sock_accepted)
+ Curl_ssl->associate_connection(data, conn, SECONDARYSOCKET);
+ }
+}
+
+void Curl_ssl_detach_conn(struct Curl_easy *data,
+ struct connectdata *conn)
+{
+ if(Curl_ssl->disassociate_connection) {
+ Curl_ssl->disassociate_connection(data, FIRSTSOCKET);
+ if(conn->sock[SECONDARYSOCKET] && conn->bits.sock_accepted)
+ Curl_ssl->disassociate_connection(data, SECONDARYSOCKET);
+ }
+}
void Curl_ssl_close_all(struct Curl_easy *data)
{
@@ -1214,7 +1233,9 @@ static const struct Curl_ssl Curl_ssl_multi = {
Curl_none_set_engine_default, /* set_engine_default */
Curl_none_engines_list, /* engines_list */
Curl_none_false_start, /* false_start */
- NULL /* sha256sum */
+ NULL, /* sha256sum */
+ NULL, /* associate_connection */
+ NULL /* disassociate_connection */
};
const struct Curl_ssl *Curl_ssl =
diff --git a/lib/vtls/vtls.h b/lib/vtls/vtls.h
index a22d526ca810..7f93e7aedb21 100644
--- a/lib/vtls/vtls.h
+++ b/lib/vtls/vtls.h
@@ -84,6 +84,11 @@ struct Curl_ssl {
bool (*false_start)(void);
CURLcode (*sha256sum)(const unsigned char *input, size_t inputlen,
unsigned char *sha256sum, size_t sha256sumlen);
+
+ void (*associate_connection)(struct Curl_easy *data,
+ struct connectdata *conn,
+ int sockindex);
+ void (*disassociate_connection)(struct Curl_easy *data, int sockindex);
};
#ifdef USE_SSL
@@ -283,6 +288,11 @@ bool Curl_ssl_cert_status_request(void);
bool Curl_ssl_false_start(void);
+void Curl_ssl_associate_conn(struct Curl_easy *data,
+ struct connectdata *conn);
+void Curl_ssl_detach_conn(struct Curl_easy *data,
+ struct connectdata *conn);
+
#define SSL_SHUTDOWN_TIMEOUT 10000 /* ms */
#else /* if not USE_SSL */
@@ -309,6 +319,8 @@ bool Curl_ssl_false_start(void);
#define Curl_ssl_cert_status_request() FALSE
#define Curl_ssl_false_start() FALSE
#define Curl_ssl_tls13_ciphersuites() FALSE
+#define Curl_ssl_associate_conn(a,b) Curl_nop_stmt
+#define Curl_ssl_detach_conn(a,b) Curl_nop_stmt
#endif
#endif /* HEADER_CURL_VTLS_H */
diff --git a/lib/vtls/wolfssl.c b/lib/vtls/wolfssl.c
index 02fcd236697e..60e27e366252 100644
--- a/lib/vtls/wolfssl.c
+++ b/lib/vtls/wolfssl.c
@@ -1125,7 +1125,9 @@ const struct Curl_ssl Curl_ssl_wolfssl = {
Curl_none_set_engine_default, /* set_engine_default */
Curl_none_engines_list, /* engines_list */
Curl_none_false_start, /* false_start */
- wolfssl_sha256sum /* sha256sum */
+ wolfssl_sha256sum, /* sha256sum */
+ NULL, /* associate_connection */
+ NULL /* disassociate_connection */
};
#endif
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