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SSH-01-006: Add missing NULL check in ssh_gssapi_handle_userauth()

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Fixes T193

Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
This commit is contained in:
Andreas Schneider
2019-10-28 14:17:19 +01:00
parent af2ea417da
commit 6b8ab4bcd2
1 changed files with 4 additions and 0 deletions
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4
src/gssapi.c
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@@ -297,6 +297,10 @@ int ssh_gssapi_handle_userauth(ssh_session session, const char *user, uint32_t n
for (i=0 ; i< n_oid ; ++i){ for (i=0 ; i< n_oid ; ++i){
unsigned char *oid_s = (unsigned char *) ssh_string_data(oids[i]); unsigned char *oid_s = (unsigned char *) ssh_string_data(oids[i]);
size_t len = ssh_string_len(oids[i]); size_t len = ssh_string_len(oids[i]);
if (oid_s == NULL) {
continue;
}
if(len < 2 || oid_s[0] != SSH_OID_TAG || ((size_t)oid_s[1]) != len - 2){ if(len < 2 || oid_s[0] != SSH_OID_TAG || ((size_t)oid_s[1]) != len - 2){
SSH_LOG(SSH_LOG_WARNING,"GSSAPI: received invalid OID"); SSH_LOG(SSH_LOG_WARNING,"GSSAPI: received invalid OID");
continue; continue;