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openssl-1.0.2k-cve-2020-1971.patch
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File openssl-1.0.2k-cve-2020-1971.patch of Package openssl
diff -up openssl-1.0.2k/crypto/asn1/asn1_err.c.null-dereference openssl-1.0.2k/crypto/asn1/asn1_err.c --- openssl-1.0.2k/crypto/asn1/asn1_err.c.null-dereference 2020-12-04 10:08:08.506247597 +0100 +++ openssl-1.0.2k/crypto/asn1/asn1_err.c 2020-12-04 10:12:31.901956486 +0100 @@ -1,6 +1,6 @@ /* crypto/asn1/asn1_err.c */ /* ==================================================================== - * Copyright (c) 1999-2014 The OpenSSL Project. All rights reserved. + * Copyright (c) 1999-2020 The OpenSSL Project. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions @@ -103,6 +103,7 @@ static ERR_STRING_DATA ASN1_str_functs[] {ERR_FUNC(ASN1_F_ASN1_ITEM_DUP), "ASN1_item_dup"}, {ERR_FUNC(ASN1_F_ASN1_ITEM_EX_COMBINE_NEW), "ASN1_ITEM_EX_COMBINE_NEW"}, {ERR_FUNC(ASN1_F_ASN1_ITEM_EX_D2I), "ASN1_ITEM_EX_D2I"}, + {ERR_PACK(ERR_LIB_ASN1, ASN1_F_ASN1_ITEM_EX_I2D, 0), "ASN1_item_ex_i2d"}, {ERR_FUNC(ASN1_F_ASN1_ITEM_I2D_BIO), "ASN1_item_i2d_bio"}, {ERR_FUNC(ASN1_F_ASN1_ITEM_I2D_FP), "ASN1_item_i2d_fp"}, {ERR_FUNC(ASN1_F_ASN1_ITEM_PACK), "ASN1_item_pack"}, @@ -202,6 +203,7 @@ static ERR_STRING_DATA ASN1_str_reasons[ {ERR_REASON(ASN1_R_AUX_ERROR), "aux error"}, {ERR_REASON(ASN1_R_BAD_CLASS), "bad class"}, {ERR_REASON(ASN1_R_BAD_OBJECT_HEADER), "bad object header"}, + {ERR_PACK(ERR_LIB_ASN1, 0, ASN1_R_BAD_TEMPLATE), "bad template"}, {ERR_REASON(ASN1_R_BAD_PASSWORD_READ), "bad password read"}, {ERR_REASON(ASN1_R_BAD_TAG), "bad tag"}, {ERR_REASON(ASN1_R_BMPSTRING_IS_WRONG_LENGTH), diff -up openssl-1.0.2k/crypto/asn1/asn1.h.null-dereference openssl-1.0.2k/crypto/asn1/asn1.h --- openssl-1.0.2k/crypto/asn1/asn1.h.null-dereference 2020-12-04 11:00:06.896637900 +0100 +++ openssl-1.0.2k/crypto/asn1/asn1.h 2020-12-04 11:04:47.079562987 +0100 @@ -1202,6 +1202,7 @@ void ERR_load_ASN1_strings(void); # define ASN1_F_ASN1_ITEM_DUP 191 # define ASN1_F_ASN1_ITEM_EX_COMBINE_NEW 121 # define ASN1_F_ASN1_ITEM_EX_D2I 120 +# define ASN1_F_ASN1_ITEM_EX_I2D 231 # define ASN1_F_ASN1_ITEM_I2D_BIO 192 # define ASN1_F_ASN1_ITEM_I2D_FP 193 # define ASN1_F_ASN1_ITEM_PACK 198 @@ -1298,6 +1299,7 @@ void ERR_load_ASN1_strings(void); # define ASN1_R_AUX_ERROR 100 # define ASN1_R_BAD_CLASS 101 # define ASN1_R_BAD_OBJECT_HEADER 102 +# define ASN1_R_BAD_TEMPLATE 230 # define ASN1_R_BAD_PASSWORD_READ 103 # define ASN1_R_BAD_TAG 104 # define ASN1_R_BMPSTRING_IS_WRONG_LENGTH 214 diff -up openssl-1.0.2k/crypto/asn1/tasn_dec.c.null-dereference openssl-1.0.2k/crypto/asn1/tasn_dec.c --- openssl-1.0.2k/crypto/asn1/tasn_dec.c.null-dereference 2020-12-04 10:12:42.036057323 +0100 +++ openssl-1.0.2k/crypto/asn1/tasn_dec.c 2020-12-04 10:17:45.685035333 +0100 @@ -223,6 +223,15 @@ static int asn1_item_ex_d2i(ASN1_VALUE * break; case ASN1_ITYPE_MSTRING: + /* + * It never makes sense for multi-strings to have implicit tagging, so + * if tag != -1, then this looks like an error in the template. + */ + if (tag != -1) { + ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ASN1_R_BAD_TEMPLATE); + goto err; + } + p = *in; /* Just read in tag and class */ ret = asn1_check_tlen(NULL, &otag, &oclass, NULL, NULL, @@ -240,6 +249,7 @@ static int asn1_item_ex_d2i(ASN1_VALUE * ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ASN1_R_MSTRING_NOT_UNIVERSAL); goto err; } + /* Check tag matches bit map */ if (!(ASN1_tag2bit(otag) & it->utype)) { /* If OPTIONAL, assume this is OK */ @@ -316,6 +326,15 @@ static int asn1_item_ex_d2i(ASN1_VALUE * goto err; case ASN1_ITYPE_CHOICE: + /* + * It never makes sense for CHOICE types to have implicit tagging, so + * if tag != -1, then this looks like an error in the template. + */ + if (tag != -1) { + ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ASN1_R_BAD_TEMPLATE); + goto err; + } + if (asn1_cb && !asn1_cb(ASN1_OP_D2I_PRE, pval, it, NULL)) goto auxerr; if (*pval) { diff -up openssl-1.0.2k/crypto/asn1/tasn_enc.c.null-dereference openssl-1.0.2k/crypto/asn1/tasn_enc.c --- openssl-1.0.2k/crypto/asn1/tasn_enc.c.null-dereference 2020-12-04 10:18:30.261472002 +0100 +++ openssl-1.0.2k/crypto/asn1/tasn_enc.c 2020-12-04 10:21:14.310078987 +0100 @@ -151,9 +151,25 @@ int ASN1_item_ex_i2d(ASN1_VALUE **pval, break; case ASN1_ITYPE_MSTRING: + /* + * It never makes sense for multi-strings to have implicit tagging, so + * if tag != -1, then this looks like an error in the template. + */ + if (tag != -1) { + ASN1err(ASN1_F_ASN1_ITEM_EX_I2D, ASN1_R_BAD_TEMPLATE); + return -1; + } return asn1_i2d_ex_primitive(pval, out, it, -1, aclass); case ASN1_ITYPE_CHOICE: + /* + * It never makes sense for CHOICE types to have implicit tagging, so + * if tag != -1, then this looks like an error in the template. + */ + if (tag != -1) { + ASN1err(ASN1_F_ASN1_ITEM_EX_I2D, ASN1_R_BAD_TEMPLATE); + return -1; + } if (asn1_cb && !asn1_cb(ASN1_OP_I2D_PRE, pval, it, NULL)) return 0; i = asn1_get_choice_selector(pval, it); diff -up openssl-1.0.2k/crypto/x509v3/v3_genn.c.null-dereference openssl-1.0.2k/crypto/x509v3/v3_genn.c --- openssl-1.0.2k/crypto/x509v3/v3_genn.c.null-dereference 2020-12-04 10:28:02.374237945 +0100 +++ openssl-1.0.2k/crypto/x509v3/v3_genn.c 2020-12-04 10:36:51.156138263 +0100 @@ -72,8 +72,9 @@ ASN1_SEQUENCE(OTHERNAME) = { IMPLEMENT_ASN1_FUNCTIONS(OTHERNAME) ASN1_SEQUENCE(EDIPARTYNAME) = { - ASN1_IMP_OPT(EDIPARTYNAME, nameAssigner, DIRECTORYSTRING, 0), - ASN1_IMP_OPT(EDIPARTYNAME, partyName, DIRECTORYSTRING, 1) + /* DirectoryString is a CHOICE type so use explicit tagging */ + ASN1_EXP_OPT(EDIPARTYNAME, nameAssigner, DIRECTORYSTRING, 0), + ASN1_EXP(EDIPARTYNAME, partyName, DIRECTORYSTRING, 1) } ASN1_SEQUENCE_END(EDIPARTYNAME) IMPLEMENT_ASN1_FUNCTIONS(EDIPARTYNAME) @@ -107,6 +108,37 @@ GENERAL_NAME *GENERAL_NAME_dup(GENERAL_N (char *)a); } +static int edipartyname_cmp(const EDIPARTYNAME *a, const EDIPARTYNAME *b) +{ + int res; + + if (a == NULL || b == NULL) { + /* + * Shouldn't be possible in a valid GENERAL_NAME, but we handle it + * anyway. OTHERNAME_cmp treats NULL != NULL so we do the same here + */ + return -1; + } + if (a->nameAssigner == NULL && b->nameAssigner != NULL) + return -1; + if (a->nameAssigner != NULL && b->nameAssigner == NULL) + return 1; + /* If we get here then both have nameAssigner set, or both unset */ + if (a->nameAssigner != NULL) { + res = ASN1_STRING_cmp(a->nameAssigner, b->nameAssigner); + if (res != 0) + return res; + } + /* + * partyName is required, so these should never be NULL. We treat it in + * the same way as the a == NULL || b == NULL case above + */ + if (a->partyName == NULL || b->partyName == NULL) + return -1; + + return ASN1_STRING_cmp(a->partyName, b->partyName); +} + /* Returns 0 if they are equal, != 0 otherwise. */ int GENERAL_NAME_cmp(GENERAL_NAME *a, GENERAL_NAME *b) { @@ -116,8 +148,11 @@ int GENERAL_NAME_cmp(GENERAL_NAME *a, GE return -1; switch (a->type) { case GEN_X400: + result = ASN1_TYPE_cmp(a->d.x400Address, b->d.x400Address); + break; + case GEN_EDIPARTY: - result = ASN1_TYPE_cmp(a->d.other, b->d.other); + result = edipartyname_cmp(a->d.ediPartyName, b->d.ediPartyName); break; case GEN_OTHERNAME: @@ -164,8 +199,11 @@ void GENERAL_NAME_set0_value(GENERAL_NAM { switch (type) { case GEN_X400: + a->d.x400Address = value; + break; + case GEN_EDIPARTY: - a->d.other = value; + a->d.ediPartyName = value; break; case GEN_OTHERNAME: @@ -199,8 +237,10 @@ void *GENERAL_NAME_get0_value(GENERAL_NA *ptype = a->type; switch (a->type) { case GEN_X400: + return a->d.x400Address; + case GEN_EDIPARTY: - return a->d.other; + return a->d.ediPartyName; case GEN_OTHERNAME: return a->d.otherName; diff -up openssl-1.0.2k/crypto/x509v3/v3nametest.c.null-dereference openssl-1.0.2k/crypto/x509v3/v3nametest.c --- openssl-1.0.2k/crypto/x509v3/v3nametest.c.null-dereference 2020-12-04 10:28:02.374237945 +0100 +++ openssl-1.0.2k/crypto/x509v3/v3nametest.c 2020-12-04 10:36:51.156138263 +0100 @@ -321,6 +321,356 @@ static void run_cert(X509 *crt, const ch } } +struct gennamedata { + const unsigned char der[22]; + size_t derlen; +} gennames[] = { + { + /* + * [0] { + * OBJECT_IDENTIFIER { 1.2.840.113554.4.1.72585.2.1 } + * [0] { + * SEQUENCE {} + * } + * } + */ + { + 0xa0, 0x13, 0x06, 0x0d, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x12, 0x04, + 0x01, 0x84, 0xb7, 0x09, 0x02, 0x01, 0xa0, 0x02, 0x30, 0x00 + }, + 21 + }, { + /* + * [0] { + * OBJECT_IDENTIFIER { 1.2.840.113554.4.1.72585.2.1 } + * [0] { + * [APPLICATION 0] {} + * } + * } + */ + { + 0xa0, 0x13, 0x06, 0x0d, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x12, 0x04, + 0x01, 0x84, 0xb7, 0x09, 0x02, 0x01, 0xa0, 0x02, 0x60, 0x00 + }, + 21 + }, { + /* + * [0] { + * OBJECT_IDENTIFIER { 1.2.840.113554.4.1.72585.2.1 } + * [0] { + * UTF8String { "a" } + * } + * } + */ + { + 0xa0, 0x14, 0x06, 0x0d, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x12, 0x04, + 0x01, 0x84, 0xb7, 0x09, 0x02, 0x01, 0xa0, 0x03, 0x0c, 0x01, 0x61 + }, + 22 + }, { + /* + * [0] { + * OBJECT_IDENTIFIER { 1.2.840.113554.4.1.72585.2.2 } + * [0] { + * UTF8String { "a" } + * } + * } + */ + { + 0xa0, 0x14, 0x06, 0x0d, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x12, 0x04, + 0x01, 0x84, 0xb7, 0x09, 0x02, 0x02, 0xa0, 0x03, 0x0c, 0x01, 0x61 + }, + 22 + }, { + /* + * [0] { + * OBJECT_IDENTIFIER { 1.2.840.113554.4.1.72585.2.1 } + * [0] { + * UTF8String { "b" } + * } + * } + */ + { + 0xa0, 0x14, 0x06, 0x0d, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x12, 0x04, + 0x01, 0x84, 0xb7, 0x09, 0x02, 0x01, 0xa0, 0x03, 0x0c, 0x01, 0x62 + }, + 22 + }, { + /* + * [0] { + * OBJECT_IDENTIFIER { 1.2.840.113554.4.1.72585.2.1 } + * [0] { + * BOOLEAN { TRUE } + * } + * } + */ + { + 0xa0, 0x14, 0x06, 0x0d, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x12, 0x04, + 0x01, 0x84, 0xb7, 0x09, 0x02, 0x01, 0xa0, 0x03, 0x01, 0x01, 0xff + }, + 22 + }, { + /* + * [0] { + * OBJECT_IDENTIFIER { 1.2.840.113554.4.1.72585.2.1 } + * [0] { + * BOOLEAN { FALSE } + * } + * } + */ + { + 0xa0, 0x14, 0x06, 0x0d, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x12, 0x04, + 0x01, 0x84, 0xb7, 0x09, 0x02, 0x01, 0xa0, 0x03, 0x01, 0x01, 0x00 + }, + 22 + }, { + /* [1 PRIMITIVE] { "a" } */ + { + 0x81, 0x01, 0x61 + }, + 3 + }, { + /* [1 PRIMITIVE] { "b" } */ + { + 0x81, 0x01, 0x62 + }, + 3 + }, { + /* [2 PRIMITIVE] { "a" } */ + { + 0x82, 0x01, 0x61 + }, + 3 + }, { + /* [2 PRIMITIVE] { "b" } */ + { + 0x82, 0x01, 0x62 + }, + 3 + }, { + /* + * [4] { + * SEQUENCE { + * SET { + * SEQUENCE { + * # commonName + * OBJECT_IDENTIFIER { 2.5.4.3 } + * UTF8String { "a" } + * } + * } + * } + * } + */ + { + 0xa4, 0x0e, 0x30, 0x0c, 0x31, 0x0a, 0x30, 0x08, 0x06, 0x03, 0x55, + 0x04, 0x03, 0x0c, 0x01, 0x61 + }, + 16 + }, { + /* + * [4] { + * SEQUENCE { + * SET { + * SEQUENCE { + * # commonName + * OBJECT_IDENTIFIER { 2.5.4.3 } + * UTF8String { "b" } + * } + * } + * } + * } + */ + { + 0xa4, 0x0e, 0x30, 0x0c, 0x31, 0x0a, 0x30, 0x08, 0x06, 0x03, 0x55, + 0x04, 0x03, 0x0c, 0x01, 0x62 + }, + 16 + }, { + /* + * [5] { + * [1] { + * UTF8String { "a" } + * } + * } + */ + { + 0xa5, 0x05, 0xa1, 0x03, 0x0c, 0x01, 0x61 + }, + 7 + }, { + /* + * [5] { + * [1] { + * UTF8String { "b" } + * } + * } + */ + { + 0xa5, 0x05, 0xa1, 0x03, 0x0c, 0x01, 0x62 + }, + 7 + }, { + /* + * [5] { + * [0] { + * UTF8String {} + * } + * [1] { + * UTF8String { "a" } + * } + * } + */ + { + 0xa5, 0x09, 0xa0, 0x02, 0x0c, 0x00, 0xa1, 0x03, 0x0c, 0x01, 0x61 + }, + 11 + }, { + /* + * [5] { + * [0] { + * UTF8String { "a" } + * } + * [1] { + * UTF8String { "a" } + * } + * } + */ + { + 0xa5, 0x0a, 0xa0, 0x03, 0x0c, 0x01, 0x61, 0xa1, 0x03, 0x0c, 0x01, + 0x61 + }, + 12 + }, { + /* + * [5] { + * [0] { + * UTF8String { "b" } + * } + * [1] { + * UTF8String { "a" } + * } + * } + */ + { + 0xa5, 0x0a, 0xa0, 0x03, 0x0c, 0x01, 0x62, 0xa1, 0x03, 0x0c, 0x01, + 0x61 + }, + 12 + }, { + /* [6 PRIMITIVE] { "a" } */ + { + 0x86, 0x01, 0x61 + }, + 3 + }, { + /* [6 PRIMITIVE] { "b" } */ + { + 0x86, 0x01, 0x62 + }, + 3 + }, { + /* [7 PRIMITIVE] { `11111111` } */ + { + 0x87, 0x04, 0x11, 0x11, 0x11, 0x11 + }, + 6 + }, { + /* [7 PRIMITIVE] { `22222222`} */ + { + 0x87, 0x04, 0x22, 0x22, 0x22, 0x22 + }, + 6 + }, { + /* [7 PRIMITIVE] { `11111111111111111111111111111111` } */ + { + 0x87, 0x10, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, + 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11 + }, + 18 + }, { + /* [7 PRIMITIVE] { `22222222222222222222222222222222` } */ + { + 0x87, 0x10, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, + 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22 + }, + 18 + }, { + /* [8 PRIMITIVE] { 1.2.840.113554.4.1.72585.2.1 } */ + { + 0x88, 0x0d, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x12, 0x04, 0x01, 0x84, + 0xb7, 0x09, 0x02, 0x01 + }, + 15 + }, { + /* [8 PRIMITIVE] { 1.2.840.113554.4.1.72585.2.2 } */ + { + 0x88, 0x0d, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x12, 0x04, 0x01, 0x84, + 0xb7, 0x09, 0x02, 0x02 + }, + 15 + } +}; + +#define OSSL_NELEM(x) (sizeof(x)/sizeof((x)[0])) + +static int test_GENERAL_NAME_cmp(void) +{ + size_t i, j; + GENERAL_NAME **namesa = OPENSSL_malloc(sizeof(*namesa) + * OSSL_NELEM(gennames)); + GENERAL_NAME **namesb = OPENSSL_malloc(sizeof(*namesb) + * OSSL_NELEM(gennames)); + int testresult = 0; + + if (namesa == NULL || namesb == NULL) + goto end; + + for (i = 0; i < OSSL_NELEM(gennames); i++) { + const unsigned char *derp = gennames[i].der; + + /* + * We create two versions of each GENERAL_NAME so that we ensure when + * we compare them they are always different pointers. + */ + namesa[i] = d2i_GENERAL_NAME(NULL, &derp, gennames[i].derlen); + derp = gennames[i].der; + namesb[i] = d2i_GENERAL_NAME(NULL, &derp, gennames[i].derlen); + if (namesa[i] == NULL || namesb[i] == NULL) + goto end; + } + + /* Every name should be equal to itself and not equal to any others. */ + for (i = 0; i < OSSL_NELEM(gennames); i++) { + for (j = 0; j < OSSL_NELEM(gennames); j++) { + if (i == j) { + if (GENERAL_NAME_cmp(namesa[i], namesb[j]) != 0) + goto end; + } else { + if (GENERAL_NAME_cmp(namesa[i], namesb[j]) == 0) + goto end; + } + } + } + testresult = 1; + + end: + for (i = 0; i < OSSL_NELEM(gennames); i++) { + if (namesa != NULL) + GENERAL_NAME_free(namesa[i]); + if (namesb != NULL) + GENERAL_NAME_free(namesb[i]); + } + OPENSSL_free(namesa); + OPENSSL_free(namesb); + + if (!testresult) + fprintf(stderr, "test of GENERAL_NAME_cmp failed\n"); + + return testresult; +} + + + int main(void) { const struct set_name_fn *pfn = name_fns; @@ -342,5 +692,8 @@ int main(void) } ++pfn; } + + errors += !test_GENERAL_NAME_cmp(); + return errors > 0 ? 1 : 0; }
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