File curl-CVE-2021-22924.patch of Package curl.27751
From 6c07d0c65e2c8d381efe100947d20e147da2217b Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Sat, 19 Jun 2021 00:42:28 +0200
Subject: [PATCH] vtls: fix connection reuse checks for issuer cert and case
sensitivity
CVE-2021-22924
Reported-by: Harry Sintonen
Bug: https://curl.se/docs/CVE-2021-22924.html
---
lib/url.c | 10 ++++++----
lib/urldata.h | 4 ++--
lib/vtls/gtls.c | 10 +++++-----
lib/vtls/nss.c | 4 ++--
lib/vtls/openssl.c | 18 +++++++++---------
lib/vtls/vtls.c | 26 +++++++++++++++++++++-----
6 files changed, 45 insertions(+), 27 deletions(-)
Index: curl-7.66.0/lib/url.c
===================================================================
--- curl-7.66.0.orig/lib/url.c
+++ curl-7.66.0/lib/url.c
@@ -3513,6 +3513,8 @@ static CURLcode create_conn(struct Curl_
data->set.proxy_ssl.primary.CApath = data->set.str[STRING_SSL_CAPATH_PROXY];
data->set.ssl.primary.CAfile = data->set.str[STRING_SSL_CAFILE_ORIG];
data->set.proxy_ssl.primary.CAfile = data->set.str[STRING_SSL_CAFILE_PROXY];
+ data->set.ssl.primary.issuercert = data->set.str[STRING_SSL_ISSUERCERT_ORIG];
+ data->set.proxy_ssl.primary.issuercert = data->set.str[STRING_SSL_ISSUERCERT_PROXY];
data->set.ssl.primary.random_file = data->set.str[STRING_SSL_RANDOM_FILE];
data->set.proxy_ssl.primary.random_file =
data->set.str[STRING_SSL_RANDOM_FILE];
@@ -3529,8 +3531,6 @@ static CURLcode create_conn(struct Curl_
data->set.ssl.CRLfile = data->set.str[STRING_SSL_CRLFILE_ORIG];
data->set.proxy_ssl.CRLfile = data->set.str[STRING_SSL_CRLFILE_PROXY];
- data->set.ssl.issuercert = data->set.str[STRING_SSL_ISSUERCERT_ORIG];
- data->set.proxy_ssl.issuercert = data->set.str[STRING_SSL_ISSUERCERT_PROXY];
data->set.ssl.cert = data->set.str[STRING_CERT_ORIG];
data->set.proxy_ssl.cert = data->set.str[STRING_CERT_PROXY];
data->set.ssl.cert_type = data->set.str[STRING_CERT_TYPE_ORIG];
Index: curl-7.66.0/lib/urldata.h
===================================================================
--- curl-7.66.0.orig/lib/urldata.h
+++ curl-7.66.0/lib/urldata.h
@@ -217,6 +217,7 @@ struct ssl_primary_config {
long version_max; /* max supported version the client wants to use*/
char *CApath; /* certificate dir (doesn't work on windows) */
char *CAfile; /* certificate to verify peer against */
+ char *issuercert; /* optional issuer certificate filename */
char *clientcert;
char *random_file; /* path to file containing "random" data */
char *egdsocket; /* path to file containing the EGD daemon socket */
@@ -232,7 +233,6 @@ struct ssl_config_data {
struct ssl_primary_config primary;
long certverifyresult; /* result from the certificate verification */
char *CRLfile; /* CRL to check certificate revocation */
- char *issuercert;/* optional issuer certificate filename */
curl_ssl_ctx_callback fsslctx; /* function to initialize ssl ctx */
void *fsslctxp; /* parameter for call back */
char *cert; /* client certificate file name */
Index: curl-7.66.0/lib/vtls/gtls.c
===================================================================
--- curl-7.66.0.orig/lib/vtls/gtls.c
+++ curl-7.66.0/lib/vtls/gtls.c
@@ -1055,7 +1055,7 @@ gtls_connect_step3(struct connectdata *c
if(!chainp) {
if(SSL_CONN_CONFIG(verifypeer) ||
SSL_CONN_CONFIG(verifyhost) ||
- SSL_SET_OPTION(issuercert)) {
+ SSL_CONN_CONFIG(issuercert)) {
#ifdef USE_TLS_SRP
if(SSL_SET_OPTION(authtype) == CURL_TLSAUTH_SRP
&& SSL_SET_OPTION(username) != NULL
@@ -1237,21 +1237,21 @@ gtls_connect_step3(struct connectdata *c
gnutls_x509_crt_t format */
gnutls_x509_crt_import(x509_cert, chainp, GNUTLS_X509_FMT_DER);
- if(SSL_SET_OPTION(issuercert)) {
+ if(SSL_CONN_CONFIG(issuercert)) {
gnutls_x509_crt_init(&x509_issuer);
- issuerp = load_file(SSL_SET_OPTION(issuercert));
+ issuerp = load_file(SSL_CONN_CONFIG(issuercert));
gnutls_x509_crt_import(x509_issuer, &issuerp, GNUTLS_X509_FMT_PEM);
rc = gnutls_x509_crt_check_issuer(x509_cert, x509_issuer);
gnutls_x509_crt_deinit(x509_issuer);
unload_file(issuerp);
if(rc <= 0) {
failf(data, "server certificate issuer check failed (IssuerCert: %s)",
- SSL_SET_OPTION(issuercert)?SSL_SET_OPTION(issuercert):"none");
+ SSL_CONN_CONFIG(issuercert)?SSL_CONN_CONFIG(issuercert):"none");
gnutls_x509_crt_deinit(x509_cert);
return CURLE_SSL_ISSUER_ERROR;
}
infof(data, "\t server certificate issuer check OK (Issuer Cert: %s)\n",
- SSL_SET_OPTION(issuercert)?SSL_SET_OPTION(issuercert):"none");
+ SSL_CONN_CONFIG(issuercert)?SSL_CONN_CONFIG(issuercert):"none");
}
size = sizeof(certbuf);
Index: curl-7.66.0/lib/vtls/nss.c
===================================================================
--- curl-7.66.0.orig/lib/vtls/nss.c
+++ curl-7.66.0/lib/vtls/nss.c
@@ -2151,9 +2151,9 @@ static CURLcode nss_do_connect(struct co
if(result)
goto error;
- if(SSL_SET_OPTION(issuercert)) {
+ if(SSL_CONN_CONFIG(issuercert)) {
SECStatus ret = SECFailure;
- char *nickname = dup_nickname(data, SSL_SET_OPTION(issuercert));
+ char *nickname = dup_nickname(data, SSL_CONN_CONFIG(issuercert));
if(nickname) {
/* we support only nicknames in case of issuercert for now */
ret = check_issuer_cert(BACKEND->handle, nickname);
Index: curl-7.66.0/lib/vtls/openssl.c
===================================================================
--- curl-7.66.0.orig/lib/vtls/openssl.c
+++ curl-7.66.0/lib/vtls/openssl.c
@@ -3565,7 +3565,7 @@ static CURLcode servercert(struct connec
deallocating the certificate. */
/* e.g. match issuer name with provided issuer certificate */
- if(SSL_SET_OPTION(issuercert)) {
+ if(SSL_CONN_CONFIG(issuercert)) {
fp = BIO_new(BIO_s_file());
if(fp == NULL) {
failf(data,
@@ -3578,10 +3578,10 @@ static CURLcode servercert(struct connec
return CURLE_OUT_OF_MEMORY;
}
- if(BIO_read_filename(fp, SSL_SET_OPTION(issuercert)) <= 0) {
+ if(BIO_read_filename(fp, SSL_CONN_CONFIG(issuercert)) <= 0) {
if(strict)
failf(data, "SSL: Unable to open issuer cert (%s)",
- SSL_SET_OPTION(issuercert));
+ SSL_CONN_CONFIG(issuercert));
BIO_free(fp);
X509_free(BACKEND->server_cert);
BACKEND->server_cert = NULL;
@@ -3592,7 +3592,7 @@ static CURLcode servercert(struct connec
if(!issuer) {
if(strict)
failf(data, "SSL: Unable to read issuer cert (%s)",
- SSL_SET_OPTION(issuercert));
+ SSL_CONN_CONFIG(issuercert));
BIO_free(fp);
X509_free(issuer);
X509_free(BACKEND->server_cert);
@@ -3603,7 +3603,7 @@ static CURLcode servercert(struct connec
if(X509_check_issued(issuer, BACKEND->server_cert) != X509_V_OK) {
if(strict)
failf(data, "SSL: Certificate issuer check failed (%s)",
- SSL_SET_OPTION(issuercert));
+ SSL_CONN_CONFIG(issuercert));
BIO_free(fp);
X509_free(issuer);
X509_free(BACKEND->server_cert);
@@ -3612,7 +3612,7 @@ static CURLcode servercert(struct connec
}
infof(data, " SSL certificate issuer check ok (%s)\n",
- SSL_SET_OPTION(issuercert));
+ SSL_CONN_CONFIG(issuercert));
BIO_free(fp);
X509_free(issuer);
}
Index: curl-7.66.0/lib/vtls/vtls.c
===================================================================
--- curl-7.66.0.orig/lib/vtls/vtls.c
+++ curl-7.66.0/lib/vtls/vtls.c
@@ -93,6 +93,7 @@ Curl_ssl_config_matches(struct ssl_prima
(data->verifystatus == needle->verifystatus) &&
Curl_safe_strcasecompare(data->CApath, needle->CApath) &&
Curl_safe_strcasecompare(data->CAfile, needle->CAfile) &&
+ Curl_safe_strcasecompare(data->issuercert, needle->issuercert) &&
Curl_safe_strcasecompare(data->clientcert, needle->clientcert) &&
Curl_safe_strcasecompare(data->random_file, needle->random_file) &&
Curl_safe_strcasecompare(data->egdsocket, needle->egdsocket) &&
@@ -116,6 +117,7 @@ Curl_clone_primary_ssl_config(struct ssl
CLONE_STRING(CApath);
CLONE_STRING(CAfile);
+ CLONE_STRING(issuercert);
CLONE_STRING(clientcert);
CLONE_STRING(random_file);
CLONE_STRING(egdsocket);
@@ -129,6 +131,7 @@ void Curl_free_primary_ssl_config(struct
{
Curl_safefree(sslc->CApath);
Curl_safefree(sslc->CAfile);
+ Curl_safefree(sslc->issuercert);
Curl_safefree(sslc->clientcert);
Curl_safefree(sslc->random_file);
Curl_safefree(sslc->egdsocket);
