File openssl-CVE-2024-0727.patch of Package openssl-1_1
From 09df4395b5071217b76dc7d3d2e630eb8c5a79c2 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)
(cherry picked from commit d135eeab8a5dbf72b3da5240bab9ddb7678dbd2c)
---
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(-)
Index: openssl-1.1.1w/crypto/pkcs12/p12_add.c
===================================================================
--- openssl-1.1.1w.orig/crypto/pkcs12/p12_add.c
+++ openssl-1.1.1w/crypto/pkcs12/p12_add.c
@@ -76,6 +76,12 @@ STACK_OF(PKCS12_SAFEBAG) *PKCS12_unpack_
PKCS12_R_CONTENT_TYPE_NOT_DATA);
return NULL;
}
+
+ if (p7->d.data == NULL) {
+ PKCS12err(PKCS12_F_PKCS12_UNPACK_P7DATA, PKCS12_R_DECODE_ERROR);
+ return NULL;
+ }
+
return ASN1_item_unpack(p7->d.data, ASN1_ITEM_rptr(PKCS12_SAFEBAGS));
}
@@ -132,6 +138,12 @@ STACK_OF(PKCS12_SAFEBAG) *PKCS12_unpack_
{
if (!PKCS7_type_is_encrypted(p7))
return NULL;
+
+ if (p7->d.encrypted == NULL) {
+ PKCS12err(PKCS12_F_PKCS12_UNPACK_P7ENCDATA, PKCS12_R_DECODE_ERROR);
+ return NULL;
+ }
+
return PKCS12_item_decrypt_d2i(p7->d.encrypted->enc_data->algorithm,
ASN1_ITEM_rptr(PKCS12_SAFEBAGS),
pass, passlen,
@@ -159,6 +171,13 @@ STACK_OF(PKCS7) *PKCS12_unpack_authsafes
PKCS12_R_CONTENT_TYPE_NOT_DATA);
return NULL;
}
+
+ if (p12->authsafes->d.data == NULL) {
+ PKCS12err(PKCS12_F_PKCS12_UNPACK_AUTHSAFES,
+ PKCS12_R_DECODE_ERROR);
+ return NULL;
+ }
+
return ASN1_item_unpack(p12->authsafes->d.data,
ASN1_ITEM_rptr(PKCS12_AUTHSAFES));
}
Index: openssl-1.1.1w/crypto/pkcs12/p12_mutl.c
===================================================================
--- openssl-1.1.1w.orig/crypto/pkcs12/p12_mutl.c
+++ openssl-1.1.1w/crypto/pkcs12/p12_mutl.c
@@ -93,6 +93,11 @@ static int pkcs12_gen_mac(PKCS12 *p12, c
return 0;
}
+ if (p12->authsafes->d.data == NULL) {
+ PKCS12err(PKCS12_F_PKCS12_GEN_MAC, PKCS12_R_DECODE_ERROR);
+ return 0;
+ }
+
salt = p12->mac->salt->data;
saltlen = p12->mac->salt->length;
if (!p12->mac->iter)
Index: openssl-1.1.1w/crypto/pkcs12/p12_npas.c
===================================================================
--- openssl-1.1.1w.orig/crypto/pkcs12/p12_npas.c
+++ openssl-1.1.1w/crypto/pkcs12/p12_npas.c
@@ -78,8 +78,9 @@ static int newpass_p12(PKCS12 *p12, cons
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;
Index: openssl-1.1.1w/crypto/pkcs7/pk7_mime.c
===================================================================
--- openssl-1.1.1w.orig/crypto/pkcs7/pk7_mime.c
+++ openssl-1.1.1w/crypto/pkcs7/pk7_mime.c
@@ -30,10 +30,13 @@ int SMIME_write_PKCS7(BIO *bio, PKCS7 *p
{
STACK_OF(X509_ALGOR) *mdalgs;
int ctype_nid = OBJ_obj2nid(p7->type);
- 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;
Index: openssl-1.1.1w/crypto/err/openssl.txt
===================================================================
--- openssl-1.1.1w.orig/crypto/err/openssl.txt
+++ openssl-1.1.1w/crypto/err/openssl.txt
@@ -1079,6 +1079,7 @@ PKCS12_F_PKCS12_SETUP_MAC:122:PKCS12_set
PKCS12_F_PKCS12_SET_MAC:123:PKCS12_set_mac
PKCS12_F_PKCS12_UNPACK_AUTHSAFES:130:PKCS12_unpack_authsafes
PKCS12_F_PKCS12_UNPACK_P7DATA:131:PKCS12_unpack_p7data
+PKCS12_F_PKCS12_UNPACK_P7ENCDATA:233:PKCS12_unpack_p7encdata
PKCS12_F_PKCS12_VERIFY_MAC:126:PKCS12_verify_mac
PKCS12_F_PKCS8_ENCRYPT:125:PKCS8_encrypt
PKCS12_F_PKCS8_SET0_PBE:132:PKCS8_set0_pbe
Index: openssl-1.1.1w/crypto/pkcs12/pk12err.c
===================================================================
--- openssl-1.1.1w.orig/crypto/pkcs12/pk12err.c
+++ openssl-1.1.1w/crypto/pkcs12/pk12err.c
@@ -58,6 +58,8 @@ static const ERR_STRING_DATA PKCS12_str_
"PKCS12_unpack_authsafes"},
{ERR_PACK(ERR_LIB_PKCS12, PKCS12_F_PKCS12_UNPACK_P7DATA, 0),
"PKCS12_unpack_p7data"},
+ {ERR_PACK(ERR_LIB_PKCS12, PKCS12_F_PKCS12_UNPACK_P7ENCDATA, 0),
+ "PKCS12_unpack_p7encdata"},
{ERR_PACK(ERR_LIB_PKCS12, PKCS12_F_PKCS12_VERIFY_MAC, 0),
"PKCS12_verify_mac"},
{ERR_PACK(ERR_LIB_PKCS12, PKCS12_F_PKCS8_ENCRYPT, 0), "PKCS8_encrypt"},
Index: openssl-1.1.1w/include/openssl/pkcs12err.h
===================================================================
--- openssl-1.1.1w.orig/include/openssl/pkcs12err.h
+++ openssl-1.1.1w/include/openssl/pkcs12err.h
@@ -49,6 +49,7 @@ int ERR_load_PKCS12_strings(void);
# define PKCS12_F_PKCS12_SET_MAC 123
# define PKCS12_F_PKCS12_UNPACK_AUTHSAFES 130
# define PKCS12_F_PKCS12_UNPACK_P7DATA 131
+# define PKCS12_F_PKCS12_UNPACK_P7ENCDATA 233
# define PKCS12_F_PKCS12_VERIFY_MAC 126
# define PKCS12_F_PKCS8_ENCRYPT 125
# define PKCS12_F_PKCS8_SET0_PBE 132
