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Fix multiple OpenSSL vulnerabilities.

Browse Source 
Security:	CVE-2011-4576, CVE-2011-4619, CVE-2011-4109
Security:	CVE-2012-0884, CVE-2012-2110
Security:	FreeBSD-SA-12:01.openssl
Approved by:	so (bz,simon)
This commit is contained in:
Bjoern A. Zeeb 2012-05-03 15:25:11 +00:00
parent 84e3b10b7c
commit a95abaf173
11 changed files with 162 additions and 39 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

54
crypto/openssl/crypto/asn1/a_d2i_fp.c
View File

@ -57,6 +57,7 @@
*/
#include <stdio.h>
#include <limits.h>
#include "cryptlib.h"
#include <openssl/buffer.h>
#include <openssl/asn1_mac.h>
@ -143,17 +144,11 @@ static int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb)
BUF_MEM *b;
unsigned char *p;
int i;
int ret=-1;
ASN1_const_CTX c;
int want=HEADER_SIZE;
size_t want=HEADER_SIZE;
int eos=0;
#if defined(__GNUC__) && defined(__ia64)
/* pathetic compiler bug in all known versions as of Nov. 2002 */
long off=0;
#else
int off=0;
#endif
int len=0;
size_t off=0;
size_t len=0;
b=BUF_MEM_new();
if (b == NULL)
@ -169,7 +164,7 @@ static int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb)
{
want-=(len-off);
if (!BUF_MEM_grow_clean(b,len+want))
if (len + want < len || !BUF_MEM_grow_clean(b,len+want))
{
ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ERR_R_MALLOC_FAILURE);
goto err;
@ -181,7 +176,14 @@ static int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb)
goto err;
}
if (i > 0)
{
if (len+i < len)
{
ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ASN1_R_TOO_LONG);
goto err;
}
len+=i;
}
}
/* else data already loaded */
@ -206,6 +208,11 @@ static int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb)
{
/* no data body so go round again */
eos++;
if (eos < 0)
{
ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ASN1_R_HEADER_TOO_LONG);
goto err;
}
want=HEADER_SIZE;
}
else if (eos && (c.slen == 0) && (c.tag == V_ASN1_EOC))
@ -220,10 +227,16 @@ static int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb)
else
{
/* suck in c.slen bytes of data */
want=(int)c.slen;
want=c.slen;
if (want > (len-off))
{
want-=(len-off);
if (want > INT_MAX /* BIO_read takes an int length */ ||
len+want < len)
{
ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ASN1_R_TOO_LONG);
goto err;
}
if (!BUF_MEM_grow_clean(b,len+want))
{
ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ERR_R_MALLOC_FAILURE);
@ -238,11 +251,18 @@ static int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb)
ASN1_R_NOT_ENOUGH_DATA);
goto err;
}
/* This can't overflow because
* |len+want| didn't overflow. */
len+=i;
want -= i;
want-=i;
}
}
off+=(int)c.slen;
if (off + c.slen < off)
{
ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ASN1_R_TOO_LONG);
goto err;
}
off+=c.slen;
if (eos <= 0)
{
break;
@ -252,9 +272,15 @@ static int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb)
}
}
if (off > INT_MAX)
{
ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ASN1_R_TOO_LONG);
goto err;
}
*pb = b;
return off;
err:
if (b != NULL) BUF_MEM_free(b);
return(ret);
return -1;
}

27
crypto/openssl/crypto/buffer/buffer.c
View File

@ -60,6 +60,11 @@
#include "cryptlib.h"
#include <openssl/buffer.h>
/* LIMIT_BEFORE_EXPANSION is the maximum n such that (n+3)/3*4 < 2**31. That
* function is applied in several functions in this file and this limit ensures
* that the result fits in an int. */
#define LIMIT_BEFORE_EXPANSION 0x5ffffffc
BUF_MEM *BUF_MEM_new(void)
{
BUF_MEM *ret;
@ -94,6 +99,11 @@ int BUF_MEM_grow(BUF_MEM *str, int len)
char *ret;
unsigned int n;
if (len < 0)
{
BUFerr(BUF_F_BUF_MEM_GROW,ERR_R_MALLOC_FAILURE);
return 0;
}
if (str->length >= len)
{
str->length=len;
@ -105,6 +115,12 @@ int BUF_MEM_grow(BUF_MEM *str, int len)
str->length=len;
return(len);
}
/* This limit is sufficient to ensure (len+3)/3*4 < 2**31 */
if (len > LIMIT_BEFORE_EXPANSION)
{
BUFerr(BUF_F_BUF_MEM_GROW,ERR_R_MALLOC_FAILURE);
return 0;
}
n=(len+3)/3*4;
if (str->data == NULL)
ret=OPENSSL_malloc(n);
@ -130,6 +146,11 @@ int BUF_MEM_grow_clean(BUF_MEM *str, int len)
char *ret;
unsigned int n;
if (len < 0)
{
BUFerr(BUF_F_BUF_MEM_GROW_CLEAN,ERR_R_MALLOC_FAILURE);
return 0;
}
if (str->length >= len)
{
memset(&str->data[len],0,str->length-len);
@ -142,6 +163,12 @@ int BUF_MEM_grow_clean(BUF_MEM *str, int len)
str->length=len;
return(len);
}
/* This limit is sufficient to ensure (len+3)/3*4 < 2**31 */
if (len > LIMIT_BEFORE_EXPANSION)
{
BUFerr(BUF_F_BUF_MEM_GROW,ERR_R_MALLOC_FAILURE);
return 0;
}
n=(len+3)/3*4;
if (str->data == NULL)
ret=OPENSSL_malloc(n);

4
crypto/openssl/crypto/mem.c
View File

@ -372,6 +372,10 @@ void *CRYPTO_realloc_clean(void *str, int old_len, int num, const char *file,
if (num <= 0) return NULL;
/* We don't support shrinking the buffer. Note the memcpy that copies
* |old_len| bytes to the new buffer, below. */
if (num < old_len) return NULL;
if (realloc_debug_func != NULL)
realloc_debug_func(str, NULL, num, file, line, 0);
ret=malloc_ex_func(num,file,line);

73
crypto/openssl/crypto/pkcs7/pk7_doit.c
View File

@ -420,6 +420,8 @@ BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert)
int max;
X509_OBJECT ret;
#endif
unsigned char *tkey = NULL;
int tkeylen;
int jj;
if ((etmp=BIO_new(BIO_f_cipher())) == NULL)
@ -461,36 +463,42 @@ BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert)
if (pcert == NULL)
{
/* Temporary storage in case EVP_PKEY_decrypt
* overwrites output buffer on error.
*/
unsigned char *tmp2;
tmp2 = OPENSSL_malloc(jj);
if (!tmp2)
goto err;
jj = -1;
/* Always attempt to decrypt all cases to avoid
* leaking timing information about a successful
* decrypt.
*/
for (i=0; i<sk_PKCS7_RECIP_INFO_num(rsk); i++)
{
int tret;
ri=sk_PKCS7_RECIP_INFO_value(rsk,i);
jj=EVP_PKEY_decrypt(tmp,
tret=EVP_PKEY_decrypt(tmp2,
M_ASN1_STRING_data(ri->enc_key),
M_ASN1_STRING_length(ri->enc_key),
pkey);
if (jj > 0)
break;
if (tret > 0)
{
memcpy(tmp, tmp2, tret);
OPENSSL_cleanse(tmp2, tret);
jj = tret;
}
ERR_clear_error();
ri = NULL;
}
if (ri == NULL)
{
PKCS7err(PKCS7_F_PKCS7_DATADECODE,
PKCS7_R_NO_RECIPIENT_MATCHES_KEY);
goto err;
}
OPENSSL_free(tmp2);
}
else
{
jj=EVP_PKEY_decrypt(tmp,
M_ASN1_STRING_data(ri->enc_key),
M_ASN1_STRING_length(ri->enc_key), pkey);
if (jj <= 0)
{
PKCS7err(PKCS7_F_PKCS7_DATADECODE,
ERR_R_EVP_LIB);
goto err;
}
ERR_clear_error();
}
evp_ctx=NULL;
@ -499,24 +507,49 @@ BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert)
goto err;
if (EVP_CIPHER_asn1_to_param(evp_ctx,enc_alg->parameter) < 0)
goto err;
/* Generate random key to counter MMA */
tkeylen = EVP_CIPHER_CTX_key_length(evp_ctx);
tkey = OPENSSL_malloc(tkeylen);
if (!tkey)
goto err;
if (EVP_CIPHER_CTX_rand_key(evp_ctx, tkey) <= 0)
goto err;
/* If we have no key use random key */
if (jj <= 0)
{
OPENSSL_free(tmp);
jj = tkeylen;
tmp = tkey;
tkey = NULL;
}
if (jj != EVP_CIPHER_CTX_key_length(evp_ctx)) {
if (jj != tkeylen) {
/* Some S/MIME clients don't use the same key
* and effective key length. The key length is
* determined by the size of the decrypted RSA key.
*/
if(!EVP_CIPHER_CTX_set_key_length(evp_ctx, jj))
{
PKCS7err(PKCS7_F_PKCS7_DATADECODE,
PKCS7_R_DECRYPTED_KEY_IS_WRONG_LENGTH);
goto err;
/* As MMA defence use random key instead */
OPENSSL_cleanse(tmp, jj);
OPENSSL_free(tmp);
jj = tkeylen;
tmp = tkey;
tkey = NULL;
}
}
ERR_clear_error();
if (EVP_CipherInit_ex(evp_ctx,NULL,NULL,tmp,NULL,0) <= 0)
goto err;
OPENSSL_cleanse(tmp,jj);
if (tkey)
{
OPENSSL_cleanse(tkey, tkeylen);
OPENSSL_free(tkey);
}
if (out == NULL)
out=etmp;
else

10
crypto/openssl/crypto/x509v3/pcy_map.c
View File

@ -70,8 +70,6 @@ static int ref_cmp(const X509_POLICY_REF * const *a,
static void policy_map_free(X509_POLICY_REF *map)
{
if (map->subjectDomainPolicy)
ASN1_OBJECT_free(map->subjectDomainPolicy);
OPENSSL_free(map);
}
@ -95,6 +93,7 @@ int policy_cache_set_mapping(X509 *x, POLICY_MAPPINGS *maps)
{
POLICY_MAPPING *map;
X509_POLICY_REF *ref = NULL;
ASN1_OBJECT *subjectDomainPolicyRef;
X509_POLICY_DATA *data;
X509_POLICY_CACHE *cache = x->policy_cache;
int i;
@ -153,13 +152,16 @@ int policy_cache_set_mapping(X509 *x, POLICY_MAPPINGS *maps)
if (!sk_ASN1_OBJECT_push(data->expected_policy_set,
map->subjectDomainPolicy))
goto bad_mapping;
/* map->subjectDomainPolicy will be freed when
* cache->data is freed. Set it to NULL to avoid double-free. */
subjectDomainPolicyRef = map->subjectDomainPolicy;
map->subjectDomainPolicy = NULL;
ref = OPENSSL_malloc(sizeof(X509_POLICY_REF));
if (!ref)
goto bad_mapping;
ref->subjectDomainPolicy = map->subjectDomainPolicy;
map->subjectDomainPolicy = NULL;
ref->subjectDomainPolicy = subjectDomainPolicyRef;
ref->data = data;
if (!sk_X509_POLICY_REF_push(cache->maps, ref))

5
crypto/openssl/crypto/x509v3/pcy_tree.c
View File

@ -612,6 +612,10 @@ int X509_policy_check(X509_POLICY_TREE **ptree, int *pexplicit_policy,
case 2:
return 1;
/* Some internal error */
case -1:
return -1;
/* Some internal error */
case 0:
return 0;
@ -691,4 +695,3 @@ int X509_policy_check(X509_POLICY_TREE **ptree, int *pexplicit_policy,
return 0;
}

3
crypto/openssl/ssl/s3_enc.c
View File

@ -479,6 +479,9 @@ int ssl3_enc(SSL *s, int send)
/* we need to add 'i-1' padding bytes */
l+=i;
/* the last of these zero bytes will be overwritten
* with the padding length. */
memset(&rec->input[rec->length], 0, i);
rec->length+=i;
rec->input[l-1]=(i-1);
}

10
crypto/openssl/ssl/s3_srvr.c
View File

@ -235,6 +235,7 @@ int ssl3_accept(SSL *s)
}
s->init_num=0;
s->s3->flags &= ~SSL3_FLAGS_SGC_RESTART_DONE;
if (s->state != SSL_ST_RENEGOTIATE)
{
@ -697,6 +698,14 @@ int ssl3_check_client_hello(SSL *s)
int ok;
long n;
/* We only allow the client to restart the handshake once per
* negotiation. */
if (s->s3->flags & SSL3_FLAGS_SGC_RESTART_DONE)
{
SSLerr(SSL_F_SSL3_CHECK_CLIENT_HELLO, SSL_R_MULTIPLE_SGC_RESTARTS);
return -1;
}
/* this function is called when we really expect a Certificate message,
* so permit appropriate message length */
n=s->method->ssl_get_message(s,
@ -725,6 +734,7 @@ int ssl3_check_client_hello(SSL *s)
s->s3->tmp.ecdh = NULL;
}
#endif
s->s3->flags |= SSL3_FLAGS_SGC_RESTART_DONE;
return 2;
}
return 1;

2
crypto/openssl/ssl/ssl.h
View File

@ -1739,6 +1739,7 @@ void ERR_load_SSL_strings(void);
#define SSL_F_SSL3_CALLBACK_CTRL 233
#define SSL_F_SSL3_CHANGE_CIPHER_STATE 129
#define SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM 130
#define SSL_F_SSL3_CHECK_CLIENT_HELLO 292
#define SSL_F_SSL3_CLIENT_HELLO 131
#define SSL_F_SSL3_CONNECT 132
#define SSL_F_SSL3_CTRL 213
@ -1974,6 +1975,7 @@ void ERR_load_SSL_strings(void);
#define SSL_R_MISSING_TMP_RSA_KEY 172
#define SSL_R_MISSING_TMP_RSA_PKEY 173
#define SSL_R_MISSING_VERIFY_MESSAGE 174
#define SSL_R_MULTIPLE_SGC_RESTARTS 325
#define SSL_R_NON_SSLV2_INITIAL_PACKET 175
#define SSL_R_NO_CERTIFICATES_RETURNED 176
#define SSL_R_NO_CERTIFICATE_ASSIGNED 177

11
crypto/openssl/ssl/ssl3.h
View File

@ -333,6 +333,17 @@ typedef struct ssl3_buffer_st
#define SSL3_FLAGS_DELAY_CLIENT_FINISHED 0x0002
#define SSL3_FLAGS_POP_BUFFER 0x0004
#define TLS1_FLAGS_TLS_PADDING_BUG 0x0008
/* SSL3_FLAGS_SGC_RESTART_DONE is set when we
* restart a handshake because of MS SGC and so prevents us
* from restarting the handshake in a loop. It's reset on a
* renegotiation, so effectively limits the client to one restart
* per negotiation. This limits the possibility of a DDoS
* attack where the client handshakes in a loop using SGC to
* restart. Servers which permit renegotiation can still be
* effected, but we can't prevent that.
*/
#define SSL3_FLAGS_SGC_RESTART_DONE 0x0040
typedef struct ssl3_state_st
{

2
crypto/openssl/ssl/ssl_err.c
View File

@ -137,6 +137,7 @@ static ERR_STRING_DATA SSL_str_functs[]=
{ERR_FUNC(SSL_F_SSL3_CALLBACK_CTRL), "SSL3_CALLBACK_CTRL"},
{ERR_FUNC(SSL_F_SSL3_CHANGE_CIPHER_STATE), "SSL3_CHANGE_CIPHER_STATE"},
{ERR_FUNC(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM), "SSL3_CHECK_CERT_AND_ALGORITHM"},
{ERR_FUNC(SSL_F_SSL3_CHECK_CLIENT_HELLO), "SSL3_CHECK_CLIENT_HELLO"},
{ERR_FUNC(SSL_F_SSL3_CLIENT_HELLO), "SSL3_CLIENT_HELLO"},
{ERR_FUNC(SSL_F_SSL3_CONNECT), "SSL3_CONNECT"},
{ERR_FUNC(SSL_F_SSL3_CTRL), "SSL3_CTRL"},
@ -375,6 +376,7 @@ static ERR_STRING_DATA SSL_str_reasons[]=
{ERR_REASON(SSL_R_MISSING_TMP_RSA_KEY) ,"missing tmp rsa key"},
{ERR_REASON(SSL_R_MISSING_TMP_RSA_PKEY) ,"missing tmp rsa pkey"},
{ERR_REASON(SSL_R_MISSING_VERIFY_MESSAGE),"missing verify message"},
{ERR_REASON(SSL_R_MULTIPLE_SGC_RESTARTS) ,"multiple sgc restarts"},
{ERR_REASON(SSL_R_NON_SSLV2_INITIAL_PACKET),"non sslv2 initial packet"},
{ERR_REASON(SSL_R_NO_CERTIFICATES_RETURNED),"no certificates returned"},
{ERR_REASON(SSL_R_NO_CERTIFICATE_ASSIGNED),"no certificate assigned"},