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ITS#9423 ldap_X509dn2bv: check for invalid BER after RDN count

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This commit is contained in:
Howard Chu 2020-12-13 21:48:45 +00:00
parent d9f20cc09e
commit c944dc55b7
1 changed files with 7 additions and 5 deletions
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12
libraries/libldap/tls2.c
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@ -1505,6 +1505,12 @@ ldap_X509dn2bv( void *x509_name, struct berval *bv, LDAPDN_rewrite_func *func,
}
}
/* Rewind and prepare to extract */
ber_rewind( ber );
tag = ber_first_element( ber, &len, &dn_end );
if ( tag == LBER_DEFAULT )
return LDAP_DECODING_ERROR;
/* Allocate the DN/RDN/AVA stuff as a single block */
dnsize = sizeof(LDAPRDN) * (nrdns+1);
dnsize += sizeof(LDAPAVA *) * (navas+nrdns);
@ -1516,16 +1522,12 @@ ldap_X509dn2bv( void *x509_name, struct berval *bv, LDAPDN_rewrite_func *func,
} else {
newDN = (LDAPDN)(char *)ptrs;
}
newDN[nrdns] = NULL;
newRDN = (LDAPRDN)(newDN + nrdns+1);
newAVA = (LDAPAVA *)(newRDN + navas + nrdns);
baseAVA = newAVA;
/* Rewind and start extracting */
ber_rewind( ber );
tag = ber_first_element( ber, &len, &dn_end );
for ( i = nrdns - 1; i >= 0; i-- ) {
newDN[i] = newRDN;