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linux/crypto/asymmetric_keys
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David Howells cc25b994ac X.509: Fix the time validation [ver #2] 
This fixes CVE-2015-5327.  It affects kernels from 4.3-rc1 onwards.

Fix the X.509 time validation to use month number-1 when looking up the
number of days in that month.  Also put the month number validation before
doing the lookup so as not to risk overrunning the array.

This can be tested by doing the following:

cat <<EOF | openssl x509 -outform DER | keyctl padd asymmetric "" @s
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
EOF

If it works, it emit a key ID; if it fails, it should give a bad message
error.

Reported-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
Acked-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
2015-11-12 21:17:15 +11:00
..
.gitignore
asymmetric_keys.h KEYS: Merge the type-specific data with the payload data 2015-10-21 15:18:36 +01:00
asymmetric_type.c KEYS: Merge the type-specific data with the payload data 2015-10-21 15:18:36 +01:00
Kconfig Merge branch 'keys-fixes' into keys-next 2014-07-22 21:55:45 +01:00
Makefile X.509: Extract both parts of the AuthorityKeyIdentifier 2015-08-07 16:26:13 +01:00
mscode_parser.c PKCS#7: Add OIDs for sha224, sha284 and sha512 hash algos and use them 2015-09-01 09:59:20 +10:00
mscode.asn1 pefile: Parse the "Microsoft individual code signing" data blob 2014-07-09 14:58:37 +01:00
pkcs7_key_type.c PKCS#7: Add MODULE_LICENSE() to test module 2015-08-13 02:51:33 +01:00
pkcs7_parser.c PKCS#7: Add OIDs for sha224, sha284 and sha512 hash algos and use them 2015-09-01 09:59:20 +10:00
pkcs7_parser.h PKCS#7: Appropriately restrict authenticated attributes and content type 2015-08-12 17:01:01 +01:00
pkcs7_trust.c X.509: Support X.509 lookup by Issuer+Serial form AuthorityKeyIdentifier 2015-08-07 16:26:13 +01:00
pkcs7_verify.c crypto: pkcs7 - Fix unaligned access in pkcs7_verify() 2015-10-14 22:23:38 +08:00
pkcs7.asn1 PKCS#7: Appropriately restrict authenticated attributes and content type 2015-08-12 17:01:01 +01:00
public_key.c KEYS: Merge the type-specific data with the payload data 2015-10-21 15:18:36 +01:00
public_key.h KEYS: Split public_key_verify_signature() and make available 2013-09-25 17:17:00 +01:00
rsa.c crypto: asymmetric_keys/rsa - Use non-conflicting variable name 2015-06-25 23:18:33 +08:00
signature.c KEYS: Merge the type-specific data with the payload data 2015-10-21 15:18:36 +01:00
verify_pefile.c PKCS#7: Appropriately restrict authenticated attributes and content type 2015-08-12 17:01:01 +01:00
verify_pefile.h pefile: Parse the "Microsoft individual code signing" data blob 2014-07-09 14:58:37 +01:00
x509_akid.asn1 X.509: Extract both parts of the AuthorityKeyIdentifier 2015-08-07 16:26:13 +01:00
x509_cert_parser.c X.509: Fix the time validation [ver #2] 2015-11-12 21:17:15 +11:00
x509_parser.h KEYS: Merge the type-specific data with the payload data 2015-10-21 15:18:36 +01:00
x509_public_key.c Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2015-11-05 15:32:38 -08:00
x509_rsakey.asn1
x509.asn1 X.509: Add bits needed for PKCS#7 2014-07-01 16:40:19 +01:00