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Validate config options during x509 extension creation

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There are several points during x509 extension creation which rely on
configuration options which may have been incorrectly parsed due to
invalid settings.  Preform a value check for null in those locations to
avoid various crashes/undefined behaviors

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/23183)
This commit is contained in:
Neil Horman 2024-01-02 15:48:00 -05:00
parent b062a3c552
commit bac7e687d7
6 changed files with 41 additions and 5 deletions
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4
crypto/x509/v3_addr.c
View File

@ -988,6 +988,10 @@ static void *v2i_IPAddrBlocks(const struct v3_ext_method *method,
* the other input values.
*/
if (safi != NULL) {
if (val->value == NULL) {
ERR_raise(ERR_LIB_X509V3, X509V3_R_MISSING_VALUE);
goto err;
}
*safi = strtoul(val->value, &t, 0);
t += strspn(t, " \t");
if (*safi > 0xFF || *t++ != ':') {

5
crypto/x509/v3_asid.c
View File

@ -545,6 +545,11 @@ static void *v2i_ASIdentifiers(const struct v3_ext_method *method,
goto err;
}
if (val->value == NULL) {
ERR_raise(ERR_LIB_X509V3, X509V3_R_EXTENSION_VALUE_ERROR);
goto err;
}
/*
* Handle inheritance.
*/

5
crypto/x509/v3_crld.c
View File

@ -70,6 +70,11 @@ static int set_dist_point_name(DIST_POINT_NAME **pdp, X509V3_CTX *ctx,
STACK_OF(GENERAL_NAME) *fnm = NULL;
STACK_OF(X509_NAME_ENTRY) *rnm = NULL;
if (cnf->value == NULL) {
ERR_raise(ERR_LIB_X509V3, X509V3_R_MISSING_VALUE);
goto err;
}
if (HAS_PREFIX(cnf->name, "fullname")) {
fnm = gnames_from_sectname(ctx, cnf->value);
if (!fnm)

16
crypto/x509/v3_ist.c
View File

@ -50,25 +50,33 @@ static ISSUER_SIGN_TOOL *v2i_issuer_sign_tool(X509V3_EXT_METHOD *method, X509V3_
}
if (strcmp(cnf->name, "signTool") == 0) {
ist->signTool = ASN1_UTF8STRING_new();
if (ist->signTool == NULL || !ASN1_STRING_set(ist->signTool, cnf->value, strlen(cnf->value))) {
if (ist->signTool == NULL
|| cnf->value == NULL
|| !ASN1_STRING_set(ist->signTool, cnf->value, strlen(cnf->value))) {
ERR_raise(ERR_LIB_X509V3, ERR_R_ASN1_LIB);
goto err;
}
} else if (strcmp(cnf->name, "cATool") == 0) {
ist->cATool = ASN1_UTF8STRING_new();
if (ist->cATool == NULL || !ASN1_STRING_set(ist->cATool, cnf->value, strlen(cnf->value))) {
if (ist->cATool == NULL
|| cnf->value == NULL
|| !ASN1_STRING_set(ist->cATool, cnf->value, strlen(cnf->value))) {
ERR_raise(ERR_LIB_X509V3, ERR_R_ASN1_LIB);
goto err;
}
} else if (strcmp(cnf->name, "signToolCert") == 0) {
ist->signToolCert = ASN1_UTF8STRING_new();
if (ist->signToolCert == NULL || !ASN1_STRING_set(ist->signToolCert, cnf->value, strlen(cnf->value))) {
if (ist->signToolCert == NULL
|| cnf->value == NULL
|| !ASN1_STRING_set(ist->signToolCert, cnf->value, strlen(cnf->value))) {
ERR_raise(ERR_LIB_X509V3, ERR_R_ASN1_LIB);
goto err;
}
} else if (strcmp(cnf->name, "cAToolCert") == 0) {
ist->cAToolCert = ASN1_UTF8STRING_new();
if (ist->cAToolCert == NULL || !ASN1_STRING_set(ist->cAToolCert, cnf->value, strlen(cnf->value))) {
if (ist->cAToolCert == NULL
|| cnf->value == NULL
|| !ASN1_STRING_set(ist->cAToolCert, cnf->value, strlen(cnf->value))) {
ERR_raise(ERR_LIB_X509V3, ERR_R_ASN1_LIB);
goto err;
}

6
test/invalid-x509.cnf Normal file
View File

@ -0,0 +1,6 @@
[ext]
issuerSignTool = signTool
sbgp-autonomousSysNum = AS
issuingDistributionPoint = fullname
sbgp-ipAddrBlock = IPv4-SAFI

10
test/recipes/25-test_x509.t
View File

@ -16,7 +16,7 @@ use OpenSSL::Test qw/:DEFAULT srctop_file/;
setup("test_x509");
plan tests => 43;
plan tests => 44;
# Prevent MSys2 filename munging for arguments that look like file paths but
# aren't
@ -217,6 +217,14 @@ ok(run(app(["openssl", "x509", "-in", $a_cert, "-CA", $ca_cert,
# verify issuer is CA
ok (get_issuer($a2_cert) =~ /CN=ca.example.com/);
my $in_csr = srctop_file('test', 'certs', 'x509-check.csr');
my $in_key = srctop_file('test', 'certs', 'x509-check-key.pem');
my $invextfile = srctop_file('test', 'invalid-x509.cnf');
# Test that invalid extensions settings fail
ok(!run(app(["openssl", "x509", "-req", "-in", $in_csr, "-signkey", $in_key,
"-out", "/dev/null", "-days", "3650" , "-extensions", "ext",
"-extfile", $invextfile])));
# Tests for issue #16080 (fixed in 1.1.1o)
my $b_key = "b-key.pem";
my $b_csr = "b-cert.csr";