openssl-3/openssl-CVE-2024-0727.patch

119 lines
4.2 KiB
Diff

From d135eeab8a5dbf72b3da5240bab9ddb7678dbd2c Mon Sep 17 00:00:00 2001
From: Matt Caswell <matt@openssl.org>
Date: Fri, 19 Jan 2024 11:28:58 +0000
Subject: [PATCH] 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)
---
crypto/pkcs12/p12_add.c | 18 ++++++++++++++++++
crypto/pkcs12/p12_mutl.c | 5 +++++
crypto/pkcs12/p12_npas.c | 5 +++--
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 6fd4184af5a52..80ce31b3bca66 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 67a885a45f89e..68ff54d0e90ee 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 62230bc6187ff..1e5b5495991a4 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 49a0da5f819c4..8228315eeaa3a 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;