diff options
author | Matt Caswell <matt@openssl.org> | 2024-01-19 11:28:58 +0000 |
---|---|---|
committer | Matt Caswell <matt@openssl.org> | 2024-01-25 15:31:57 +0000 |
commit | d135eeab8a5dbf72b3da5240bab9ddb7678dbd2c (patch) | |
tree | 03abf30fa0c4410ecee951f25d0f02ed8dd4b305 | |
parent | 96014134630799ee5879ed94b6450e860ba4ebfe (diff) |
Add NULL checks where ContentInfo data can be NULL
PKCS12 structures contain PKCS7 ContentInfo fields. These fields are
optional and can be NULL even if the "type" is a valid value. OpenSSL
was not properly accounting for this and a NULL dereference can occur
causing a crash.
CVE-2024-0727
Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Hugo Landau <hlandau@openssl.org>
Reviewed-by: Neil Horman <nhorman@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/23362)
-rw-r--r-- | crypto/pkcs12/p12_add.c | 18 | ||||
-rw-r--r-- | crypto/pkcs12/p12_mutl.c | 5 | ||||
-rw-r--r-- | crypto/pkcs12/p12_npas.c | 5 | ||||
-rw-r--r-- | crypto/pkcs7/pk7_mime.c | 7 |
4 files changed, 31 insertions, 4 deletions
diff --git a/crypto/pkcs12/p12_add.c b/crypto/pkcs12/p12_add.c index 6fd4184af5..80ce31b3bc 100644 --- a/crypto/pkcs12/p12_add.c +++ b/crypto/pkcs12/p12_add.c @@ -78,6 +78,12 @@ STACK_OF(PKCS12_SAFEBAG) *PKCS12_unpack_p7data(PKCS7 *p7) ERR_raise(ERR_LIB_PKCS12, PKCS12_R_CONTENT_TYPE_NOT_DATA); return NULL; } + + if (p7->d.data == NULL) { + ERR_raise(ERR_LIB_PKCS12, PKCS12_R_DECODE_ERROR); + return NULL; + } + return ASN1_item_unpack(p7->d.data, ASN1_ITEM_rptr(PKCS12_SAFEBAGS)); } @@ -150,6 +156,12 @@ STACK_OF(PKCS12_SAFEBAG) *PKCS12_unpack_p7encdata(PKCS7 *p7, const char *pass, { if (!PKCS7_type_is_encrypted(p7)) return NULL; + + if (p7->d.encrypted == NULL) { + ERR_raise(ERR_LIB_PKCS12, PKCS12_R_DECODE_ERROR); + return NULL; + } + return PKCS12_item_decrypt_d2i_ex(p7->d.encrypted->enc_data->algorithm, ASN1_ITEM_rptr(PKCS12_SAFEBAGS), pass, passlen, @@ -188,6 +200,12 @@ STACK_OF(PKCS7) *PKCS12_unpack_authsafes(const PKCS12 *p12) ERR_raise(ERR_LIB_PKCS12, PKCS12_R_CONTENT_TYPE_NOT_DATA); return NULL; } + + if (p12->authsafes->d.data == NULL) { + ERR_raise(ERR_LIB_PKCS12, PKCS12_R_DECODE_ERROR); + return NULL; + } + p7s = ASN1_item_unpack(p12->authsafes->d.data, ASN1_ITEM_rptr(PKCS12_AUTHSAFES)); if (p7s != NULL) { diff --git a/crypto/pkcs12/p12_mutl.c b/crypto/pkcs12/p12_mutl.c index 67a885a45f..68ff54d0e9 100644 --- a/crypto/pkcs12/p12_mutl.c +++ b/crypto/pkcs12/p12_mutl.c @@ -98,6 +98,11 @@ static int pkcs12_gen_mac(PKCS12 *p12, const char *pass, int passlen, return 0; } + if (p12->authsafes->d.data == NULL) { + ERR_raise(ERR_LIB_PKCS12, PKCS12_R_DECODE_ERROR); + return 0; + } + salt = p12->mac->salt->data; saltlen = p12->mac->salt->length; if (p12->mac->iter == NULL) diff --git a/crypto/pkcs12/p12_npas.c b/crypto/pkcs12/p12_npas.c index 62230bc618..1e5b549599 100644 --- a/crypto/pkcs12/p12_npas.c +++ b/crypto/pkcs12/p12_npas.c @@ -77,8 +77,9 @@ static int newpass_p12(PKCS12 *p12, const char *oldpass, const char *newpass) bags = PKCS12_unpack_p7data(p7); } else if (bagnid == NID_pkcs7_encrypted) { bags = PKCS12_unpack_p7encdata(p7, oldpass, -1); - if (!alg_get(p7->d.encrypted->enc_data->algorithm, - &pbe_nid, &pbe_iter, &pbe_saltlen)) + if (p7->d.encrypted == NULL + || !alg_get(p7->d.encrypted->enc_data->algorithm, + &pbe_nid, &pbe_iter, &pbe_saltlen)) goto err; } else { continue; diff --git a/crypto/pkcs7/pk7_mime.c b/crypto/pkcs7/pk7_mime.c index 49a0da5f81..8228315eea 100644 --- a/crypto/pkcs7/pk7_mime.c +++ b/crypto/pkcs7/pk7_mime.c @@ -33,10 +33,13 @@ int SMIME_write_PKCS7(BIO *bio, PKCS7 *p7, BIO *data, int flags) int ctype_nid = OBJ_obj2nid(p7->type); const PKCS7_CTX *ctx = ossl_pkcs7_get0_ctx(p7); - if (ctype_nid == NID_pkcs7_signed) + if (ctype_nid == NID_pkcs7_signed) { + if (p7->d.sign == NULL) + return 0; mdalgs = p7->d.sign->md_algs; - else + } else { mdalgs = NULL; + } flags ^= SMIME_OLDMIME; |