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home:dirkmueller:acdc:as_python3_module
openssl-1_1.24606
CVE-2021-3712-other-ASN1_STRING-issues.patch
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File CVE-2021-3712-other-ASN1_STRING-issues.patch of Package openssl-1_1.24606
Index: openssl-1.1.1d/crypto/asn1/asn1_lib.c =================================================================== --- openssl-1.1.1d.orig/crypto/asn1/asn1_lib.c +++ openssl-1.1.1d/crypto/asn1/asn1_lib.c @@ -281,7 +281,12 @@ int ASN1_STRING_set(ASN1_STRING *str, co } if ((str->length <= len) || (str->data == NULL)) { c = str->data; +#ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION + /* No NUL terminator in fuzzing builds */ + str->data = OPENSSL_realloc(c, len); +#else str->data = OPENSSL_realloc(c, len + 1); +#endif if (str->data == NULL) { ASN1err(ASN1_F_ASN1_STRING_SET, ERR_R_MALLOC_FAILURE); str->data = c; @@ -291,8 +296,13 @@ int ASN1_STRING_set(ASN1_STRING *str, co str->length = len; if (data != NULL) { memcpy(str->data, data, len); - /* an allowance for strings :-) */ +#ifndef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION + /* + * Add a NUL terminator. This should not be necessary - but we add it as + * a safety precaution + */ str->data[len] = '\0'; +#endif } return 1; } Index: openssl-1.1.1d/crypto/asn1/t_spki.c =================================================================== --- openssl-1.1.1d.orig/crypto/asn1/t_spki.c +++ openssl-1.1.1d/crypto/asn1/t_spki.c @@ -38,7 +38,7 @@ int NETSCAPE_SPKI_print(BIO *out, NETSCA } chal = spki->spkac->challenge; if (chal->length) - BIO_printf(out, " Challenge String: %s\n", chal->data); + BIO_printf(out, " Challenge String: %.*s\n", chal->length, chal->data); i = OBJ_obj2nid(spki->sig_algor.algorithm); BIO_printf(out, " Signature Algorithm: %s", (i == NID_undef) ? "UNKNOWN" : OBJ_nid2ln(i)); Index: openssl-1.1.1d/crypto/ec/ec_asn1.c =================================================================== --- openssl-1.1.1d.orig/crypto/ec/ec_asn1.c +++ openssl-1.1.1d/crypto/ec/ec_asn1.c @@ -744,7 +744,10 @@ EC_GROUP *EC_GROUP_new_from_ecparameters ret->seed_len = params->curve->seed->length; } - if (!params->order || !params->base || !params->base->data) { + if (params->order == NULL + || params->base == NULL + || params->base->data == NULL + || params->base->length == 0) { ECerr(EC_F_EC_GROUP_NEW_FROM_ECPARAMETERS, EC_R_ASN1_ERROR); goto err; } Index: openssl-1.1.1d/crypto/include/internal/x509_int.h =================================================================== --- openssl-1.1.1d.orig/crypto/include/internal/x509_int.h +++ openssl-1.1.1d/crypto/include/internal/x509_int.h @@ -8,6 +8,8 @@ */ #include "internal/refcount.h" +#include <openssl/x509.h> +#include <openssl/conf.h> /* Internal X509 structures and functions: not for application use */ @@ -284,3 +286,6 @@ int a2i_ipadd(unsigned char *ipout, cons int x509_set1_time(ASN1_TIME **ptm, const ASN1_TIME *tm); void x509_init_sig_info(X509 *x); + +int x509v3_add_len_value_uchar(const char *name, const unsigned char *value, + size_t vallen, STACK_OF(CONF_VALUE) **extlist); Index: openssl-1.1.1d/crypto/x509v3/v3_akey.c =================================================================== --- openssl-1.1.1d.orig/crypto/x509v3/v3_akey.c +++ openssl-1.1.1d/crypto/x509v3/v3_akey.c @@ -39,20 +39,48 @@ static STACK_OF(CONF_VALUE) *i2v_AUTHORI STACK_OF(CONF_VALUE) *extlist) { - char *tmp; + char *tmp = NULL; + STACK_OF(CONF_VALUE) *origextlist = extlist, *tmpextlist; + if (akeyid->keyid) { tmp = OPENSSL_buf2hexstr(akeyid->keyid->data, akeyid->keyid->length); - X509V3_add_value("keyid", tmp, &extlist); + if (tmp == NULL) { + X509V3err(X509V3_F_V2I_AUTHORITY_KEYID, ERR_R_MALLOC_FAILURE); + return NULL; + } + if (!X509V3_add_value("keyid", tmp, &extlist)) { + OPENSSL_free(tmp); + X509V3err(X509V3_F_V2I_AUTHORITY_KEYID, ERR_R_X509_LIB); + goto err; + } OPENSSL_free(tmp); } - if (akeyid->issuer) - extlist = i2v_GENERAL_NAMES(NULL, akeyid->issuer, extlist); + if (akeyid->issuer) { + tmpextlist = i2v_GENERAL_NAMES(NULL, akeyid->issuer, extlist); + if (tmpextlist == NULL) { + X509V3err(X509V3_F_V2I_AUTHORITY_KEYID, ERR_R_X509_LIB); + goto err; + } + extlist = tmpextlist; + } if (akeyid->serial) { tmp = OPENSSL_buf2hexstr(akeyid->serial->data, akeyid->serial->length); - X509V3_add_value("serial", tmp, &extlist); + if (tmp == NULL) { + X509V3err(X509V3_F_V2I_AUTHORITY_KEYID, ERR_R_MALLOC_FAILURE); + goto err; + } + if (!X509V3_add_value("serial", tmp, &extlist)) { + OPENSSL_free(tmp); + X509V3err(X509V3_F_V2I_AUTHORITY_KEYID, ERR_R_X509_LIB); + goto err; + } OPENSSL_free(tmp); } return extlist; + err: + if (origextlist == NULL) + sk_CONF_VALUE_pop_free(extlist, X509V3_conf_free); + return NULL; } /*- Index: openssl-1.1.1d/crypto/x509v3/v3_alt.c =================================================================== --- openssl-1.1.1d.orig/crypto/x509v3/v3_alt.c +++ openssl-1.1.1d/crypto/x509v3/v3_alt.c @@ -9,6 +9,7 @@ #include <stdio.h> #include "internal/cryptlib.h" +#include <openssl/x509.h> #include <openssl/conf.h> #include <openssl/x509v3.h> #include "ext_dat.h" @@ -86,17 +87,20 @@ STACK_OF(CONF_VALUE) *i2v_GENERAL_NAME(X break; case GEN_EMAIL: - if (!X509V3_add_value_uchar("email", gen->d.ia5->data, &ret)) + if (!x509v3_add_len_value_uchar("email", gen->d.ia5->data, + gen->d.ia5->length, &ret)) return NULL; break; case GEN_DNS: - if (!X509V3_add_value_uchar("DNS", gen->d.ia5->data, &ret)) + if (!x509v3_add_len_value_uchar("DNS", gen->d.ia5->data, + gen->d.ia5->length, &ret)) return NULL; break; case GEN_URI: - if (!X509V3_add_value_uchar("URI", gen->d.ia5->data, &ret)) + if (!x509v3_add_len_value_uchar("URI", gen->d.ia5->data, + gen->d.ia5->length, &ret)) return NULL; break; Index: openssl-1.1.1d/crypto/x509v3/v3_cpols.c =================================================================== --- openssl-1.1.1d.orig/crypto/x509v3/v3_cpols.c +++ openssl-1.1.1d/crypto/x509v3/v3_cpols.c @@ -422,7 +422,8 @@ static void print_qualifiers(BIO *out, S qualinfo = sk_POLICYQUALINFO_value(quals, i); switch (OBJ_obj2nid(qualinfo->pqualid)) { case NID_id_qt_cps: - BIO_printf(out, "%*sCPS: %s\n", indent, "", + BIO_printf(out, "%*sCPS: %.*s\n", indent, "", + qualinfo->d.cpsuri->length, qualinfo->d.cpsuri->data); break; @@ -447,7 +448,8 @@ static void print_notice(BIO *out, USERN if (notice->noticeref) { NOTICEREF *ref; ref = notice->noticeref; - BIO_printf(out, "%*sOrganization: %s\n", indent, "", + BIO_printf(out, "%*sOrganization: %.*s\n", indent, "", + ref->organization->length, ref->organization->data); BIO_printf(out, "%*sNumber%s: ", indent, "", sk_ASN1_INTEGER_num(ref->noticenos) > 1 ? "s" : ""); @@ -470,7 +472,8 @@ static void print_notice(BIO *out, USERN BIO_puts(out, "\n"); } if (notice->exptext) - BIO_printf(out, "%*sExplicit Text: %s\n", indent, "", + BIO_printf(out, "%*sExplicit Text: %.*s\n", indent, "", + notice->exptext->length, notice->exptext->data); } Index: openssl-1.1.1d/crypto/x509v3/v3_ncons.c =================================================================== --- openssl-1.1.1d.orig/crypto/x509v3/v3_ncons.c +++ openssl-1.1.1d/crypto/x509v3/v3_ncons.c @@ -63,8 +63,31 @@ ASN1_SEQUENCE(NAME_CONSTRAINTS) = { IMPLEMENT_ASN1_ALLOC_FUNCTIONS(GENERAL_SUBTREE) IMPLEMENT_ASN1_ALLOC_FUNCTIONS(NAME_CONSTRAINTS) + +#define IA5_OFFSET_LEN(ia5base, offset) \ + ((ia5base)->length - ((unsigned char *)(offset) - (ia5base)->data)) + +/* Like memchr but for ASN1_IA5STRING. Additionally you can specify the + * starting point to search from + */ +# define ia5memchr(str, start, c) memchr(start, c, IA5_OFFSET_LEN(str, start)) + +/* Like memrrchr but for ASN1_IA5STRING */ +static char *ia5memrchr(ASN1_IA5STRING *str, int c) +{ + int i; + + for (i = str->length; i > 0 && str->data[i - 1] != c; i--); + + if (i == 0) + return NULL; + + return (char *)&str->data[i - 1]; +} + /* - * We cannot use strncasecmp here because that applies locale specific rules. + * We cannot use strncasecmp here because that applies locale specific rules. It + * also doesn't work with ASN1_STRINGs that may have embedded NUL characters. * For example in Turkish 'I' is not the uppercase character for 'i'. We need to * do a simple ASCII case comparison ignoring the locale (that is why we use * numeric constants below). @@ -89,20 +112,12 @@ static int ia5ncasecmp(const char *s1, c /* c1 > c2 */ return 1; - } else if (*s1 == 0) { - /* If we get here we know that *s2 == 0 too */ - return 0; } } return 0; } -static int ia5casecmp(const char *s1, const char *s2) -{ - return ia5ncasecmp(s1, s2, SIZE_MAX); -} - static void *v2i_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method, X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval) { @@ -337,7 +352,7 @@ static int cn2dnsid(ASN1_STRING *cn, uns --utf8_length; /* Reject *embedded* NULs */ - if ((size_t)utf8_length != strlen((char *)utf8_value)) { + if (memchr(utf8_value, 0, utf8_length) != NULL) { OPENSSL_free(utf8_value); return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX; } @@ -536,9 +551,14 @@ static int nc_dns(ASN1_IA5STRING *dns, A { char *baseptr = (char *)base->data; char *dnsptr = (char *)dns->data; + /* Empty matches everything */ - if (!*baseptr) + if (base->length == 0) return X509_V_OK; + + if (dns->length < base->length) + return X509_V_ERR_PERMITTED_VIOLATION; + /* * Otherwise can add zero or more components on the left so compare RHS * and if dns is longer and expect '.' as preceding character. @@ -549,7 +569,7 @@ static int nc_dns(ASN1_IA5STRING *dns, A return X509_V_ERR_PERMITTED_VIOLATION; } - if (ia5casecmp(baseptr, dnsptr)) + if (ia5ncasecmp(baseptr, dnsptr, base->length)) return X509_V_ERR_PERMITTED_VIOLATION; return X509_V_OK; @@ -560,16 +580,17 @@ static int nc_email(ASN1_IA5STRING *eml, { const char *baseptr = (char *)base->data; const char *emlptr = (char *)eml->data; + const char *baseat = ia5memrchr(base, '@'); + const char *emlat = ia5memrchr(eml, '@'); + size_t basehostlen, emlhostlen; - const char *baseat = strchr(baseptr, '@'); - const char *emlat = strchr(emlptr, '@'); if (!emlat) return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX; /* Special case: initial '.' is RHS match */ - if (!baseat && (*baseptr == '.')) { + if (!baseat && base->length > 0 && (*baseptr == '.')) { if (eml->length > base->length) { emlptr += eml->length - base->length; - if (ia5casecmp(baseptr, emlptr) == 0) + if (ia5ncasecmp(baseptr, emlptr, base->length) == 0) return X509_V_OK; } return X509_V_ERR_PERMITTED_VIOLATION; @@ -589,8 +610,10 @@ static int nc_email(ASN1_IA5STRING *eml, baseptr = baseat + 1; } emlptr = emlat + 1; + basehostlen = IA5_OFFSET_LEN(base, baseptr); + emlhostlen = IA5_OFFSET_LEN(eml, emlptr); /* Just have hostname left to match: case insensitive */ - if (ia5casecmp(baseptr, emlptr)) + if (basehostlen != emlhostlen || ia5ncasecmp(baseptr, emlptr, emlhostlen)) return X509_V_ERR_PERMITTED_VIOLATION; return X509_V_OK; @@ -601,10 +624,14 @@ static int nc_uri(ASN1_IA5STRING *uri, A { const char *baseptr = (char *)base->data; const char *hostptr = (char *)uri->data; - const char *p = strchr(hostptr, ':'); + const char *p = ia5memchr(uri, (char *)uri->data, ':'); int hostlen; + /* Check for foo:// and skip past it */ - if (!p || (p[1] != '/') || (p[2] != '/')) + if (p == NULL + || IA5_OFFSET_LEN(uri, p) < 3 + || p[1] != '/' + || p[2] != '/') return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX; hostptr = p + 3; @@ -612,13 +639,13 @@ static int nc_uri(ASN1_IA5STRING *uri, A /* Look for a port indicator as end of hostname first */ - p = strchr(hostptr, ':'); + p = ia5memchr(uri, hostptr, ':'); /* Otherwise look for trailing slash */ - if (!p) - p = strchr(hostptr, '/'); + if (p == NULL) + p = ia5memchr(uri, hostptr, '/'); - if (!p) - hostlen = strlen(hostptr); + if (p == NULL) + hostlen = IA5_OFFSET_LEN(uri, hostptr); else hostlen = p - hostptr; @@ -626,7 +653,7 @@ static int nc_uri(ASN1_IA5STRING *uri, A return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX; /* Special case: initial '.' is RHS match */ - if (*baseptr == '.') { + if (base->length > 0 && *baseptr == '.') { if (hostlen > base->length) { p = hostptr + hostlen - base->length; if (ia5ncasecmp(p, baseptr, base->length) == 0) Index: openssl-1.1.1d/crypto/x509v3/v3_pci.c =================================================================== --- openssl-1.1.1d.orig/crypto/x509v3/v3_pci.c +++ openssl-1.1.1d/crypto/x509v3/v3_pci.c @@ -77,7 +77,8 @@ static int i2r_pci(X509V3_EXT_METHOD *me i2a_ASN1_OBJECT(out, pci->proxyPolicy->policyLanguage); BIO_puts(out, "\n"); if (pci->proxyPolicy->policy && pci->proxyPolicy->policy->data) - BIO_printf(out, "%*sPolicy Text: %s\n", indent, "", + BIO_printf(out, "%*sPolicy Text: %.*s\n", indent, "", + pci->proxyPolicy->policy->length, pci->proxyPolicy->policy->data); return 1; } Index: openssl-1.1.1d/crypto/x509v3/v3_utl.c =================================================================== --- openssl-1.1.1d.orig/crypto/x509v3/v3_utl.c +++ openssl-1.1.1d/crypto/x509v3/v3_utl.c @@ -12,6 +12,7 @@ #include "e_os.h" #include "internal/cryptlib.h" #include <stdio.h> +#include <string.h> #include "internal/ctype.h" #include <openssl/conf.h> #include <openssl/crypto.h> @@ -34,17 +35,26 @@ static int ipv6_hex(unsigned char *out, /* Add a CONF_VALUE name value pair to stack */ -int X509V3_add_value(const char *name, const char *value, - STACK_OF(CONF_VALUE) **extlist) +static int x509v3_add_len_value(const char *name, const char *value, + size_t vallen, STACK_OF(CONF_VALUE) **extlist) { CONF_VALUE *vtmp = NULL; char *tname = NULL, *tvalue = NULL; int sk_allocated = (*extlist == NULL); - if (name && (tname = OPENSSL_strdup(name)) == NULL) - goto err; - if (value && (tvalue = OPENSSL_strdup(value)) == NULL) + if (name != NULL && (tname = OPENSSL_strdup(name)) == NULL) goto err; + if (value != NULL && vallen > 0) { + /* + * We tolerate a single trailing NUL character, but otherwise no + * embedded NULs + */ + if (memchr(value, 0, vallen - 1) != NULL) + goto err; + tvalue = OPENSSL_strndup(value, vallen); + if (tvalue == NULL) + goto err; + } if ((vtmp = OPENSSL_malloc(sizeof(*vtmp))) == NULL) goto err; if (sk_allocated && (*extlist = sk_CONF_VALUE_new_null()) == NULL) @@ -67,10 +77,26 @@ int X509V3_add_value(const char *name, c return 0; } +int X509V3_add_value(const char *name, const char *value, + STACK_OF(CONF_VALUE) **extlist) +{ + return x509v3_add_len_value(name, value, + value != NULL ? strlen((const char *)value) : 0, + extlist); +} + int X509V3_add_value_uchar(const char *name, const unsigned char *value, STACK_OF(CONF_VALUE) **extlist) { - return X509V3_add_value(name, (const char *)value, extlist); + return x509v3_add_len_value(name, (const char *)value, + value != NULL ? strlen((const char *)value) : 0, + extlist); +} + +int x509v3_add_len_value_uchar(const char *name, const unsigned char *value, + size_t vallen, STACK_OF(CONF_VALUE) **extlist) +{ + return x509v3_add_len_value(name, (const char *)value, vallen, extlist); } /* Free function for STACK_OF(CONF_VALUE) */ @@ -502,18 +528,26 @@ static int append_ia5(STACK_OF(OPENSSL_S /* First some sanity checks */ if (email->type != V_ASN1_IA5STRING) return 1; - if (!email->data || !email->length) + if (email->data == NULL || email->length == 0) + return 1; + if (memchr(email->data, 0, email->length) != NULL) return 1; if (*sk == NULL) *sk = sk_OPENSSL_STRING_new(sk_strcmp); if (*sk == NULL) return 0; + + emtmp = OPENSSL_strndup((char *)email->data, email->length); + if (emtmp == NULL) + return 0; + /* Don't add duplicates */ - if (sk_OPENSSL_STRING_find(*sk, (char *)email->data) != -1) + if (sk_OPENSSL_STRING_find(*sk, emtmp) != -1) { + OPENSSL_free(emtmp); return 1; - emtmp = OPENSSL_strdup((char *)email->data); - if (emtmp == NULL || !sk_OPENSSL_STRING_push(*sk, emtmp)) { - OPENSSL_free(emtmp); /* free on push failure */ + } + if (!sk_OPENSSL_STRING_push(*sk, emtmp)) { + OPENSSL_free(emtmp); /* free on push failure */ X509_email_free(*sk); *sk = NULL; return 0; Index: openssl-1.1.1d/test/x509_time_test.c =================================================================== --- openssl-1.1.1d.orig/test/x509_time_test.c +++ openssl-1.1.1d/test/x509_time_test.c @@ -330,10 +330,12 @@ static int test_x509_time(int idx) /* if t is not NULL but expected_string is NULL, it is an 'OK' case too */ if (t != NULL && x509_format_tests[idx].expected_string) { - if (!TEST_str_eq((const char *)t->data, - x509_format_tests[idx].expected_string)) { - TEST_info("test_x509_time(%d) failed: expected_string %s, got %s\n", - idx, x509_format_tests[idx].expected_string, t->data); + if (!TEST_mem_eq((const char *)t->data, t->length, + x509_format_tests[idx].expected_string, + strlen(x509_format_tests[idx].expected_string))) { + TEST_info("test_x509_time(%d) failed: expected_string %s, got %.*s\n", + idx, x509_format_tests[idx].expected_string, t->length, + t->data); goto out; } }
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