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e2a10de275
mbedtls/library
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Gilles Peskine e2a10de275 Fix a timing-based Bleichenbacher attack on PKCS#1v1.5 decryption 
mbedtls_rsa_rsaes_pkcs1_v15_decrypt took care of calculating the
padding length without leaking the amount of padding or the validity
of the padding. However it then skipped the copying of the data if the
padding was invalid, which could allow an adversary to find out
whether the padding was valid through precise timing measurements,
especially if for a local attacker who could observe memory access via
cache timings.

Avoid this leak by always copying from the decryption buffer to the
output buffer, even when the padding is invalid. With invalid padding,
copy the same amount of data as what is expected on valid padding: the
minimum valid padding size if this fits in the output buffer,
otherwise the output buffer size. To avoid leaking payload data from
an unsuccessful decryption, zero the decryption buffer before copying
if the padding was invalid.
2018-10-03 01:03:05 +02:00
..
.gitignore
aes.c Merge remote-tracking branch 'public/pr/1736' into development 2018-06-17 17:34:55 +01:00
aesni.c Warn if using a memory sanitizer on AESNI 2018-04-05 15:37:38 +02:00
arc4.c Rename mbedtls_zeroize to mbedtls_platform_zeroize 2018-04-17 10:00:21 -05:00
aria.c Use mbedtls_printf instead of printf 2018-08-13 13:49:52 +03:00
asn1parse.c Rename mbedtls_zeroize to mbedtls_platform_zeroize 2018-04-17 10:00:21 -05:00
asn1write.c Treat warnings as errors for IAR 2018-05-25 14:54:14 +01:00
base64.c
bignum.c Merge remote-tracking branch 'upstream-restricted/pr/421' into development-proposed 2018-05-04 14:39:24 +01:00
blowfish.c Rename mbedtls_zeroize to mbedtls_platform_zeroize 2018-04-17 10:00:21 -05:00
camellia.c Rename mbedtls_zeroize to mbedtls_platform_zeroize 2018-04-17 10:00:21 -05:00
ccm.c enforce input and output of ccm selftest on stack 2018-07-30 11:29:26 +03:00
certs.c
chacha20.c Fix usage of inline with for some compilers 2018-06-07 11:54:17 +02:00
chachapoly.c Fix a few typos 2018-06-18 10:30:30 +02:00
cipher_wrap.c Define specific mode for ChachaPoly 2018-06-19 11:32:48 +02:00
cipher.c Move definition of MBEDTLS_CIPHER_MODE_STREAM 2018-07-01 10:20:43 +03:00
cmac.c Merge remote-tracking branch 'public/pr/1390' into development 2018-06-27 10:51:47 +01:00
CMakeLists.txt Update library version number to 2.13.1 2018-09-06 19:10:26 +01:00
ctr_drbg.c Rename mbedtls_zeroize to mbedtls_platform_zeroize 2018-04-17 10:00:21 -05:00
debug.c
des.c Rename mbedtls_zeroize to mbedtls_platform_zeroize 2018-04-17 10:00:21 -05:00
dhm.c Rename mbedtls_zeroize to mbedtls_platform_zeroize 2018-04-17 10:00:21 -05:00
ecdh.c
ecdsa.c Clarify the use of MBEDTLS_ERR_PK_SIG_LEN_MISMATCH 2018-03-30 18:43:16 +02:00
ecjpake.c Fix minor code style issues 2018-05-15 09:21:57 +01:00
ecp_curves.c Merge branch 'pr_348' into development-proposed 2018-04-04 09:18:27 +02:00
ecp.c Remove redundant else statement 2018-08-20 10:39:27 +03:00
entropy_poll.c Merge remote-tracking branch 'public/pr/1198' into development 2018-07-24 17:20:17 +01:00
entropy.c Rename mbedtls_zeroize to mbedtls_platform_zeroize 2018-04-17 10:00:21 -05:00
error.c Update error codes 2018-08-17 16:52:08 +01:00
gcm.c Rename mbedtls_zeroize to mbedtls_platform_zeroize 2018-04-17 10:00:21 -05:00
havege.c Rename mbedtls_zeroize to mbedtls_platform_zeroize 2018-04-17 10:00:21 -05:00
hkdf.c Fix issue if salt = NULL and salt_len !=0 in mbedtls_hkdf_extract() 2018-07-23 10:34:47 -07:00
hmac_drbg.c Rename mbedtls_zeroize to mbedtls_platform_zeroize 2018-04-17 10:00:21 -05:00
Makefile Update library version number to 2.13.0 2018-08-31 15:59:10 +01:00
md2.c Rename mbedtls_zeroize to mbedtls_platform_zeroize 2018-04-17 10:00:21 -05:00
md4.c Rename mbedtls_zeroize to mbedtls_platform_zeroize 2018-04-17 10:00:21 -05:00
md5.c Fix Lucky 13 cache attack on MD/SHA padding 2018-07-05 10:47:00 +02:00
md_wrap.c New MD API: rename functions from _ext to _ret 2018-01-22 11:54:42 +01:00
md.c Rename mbedtls_zeroize to mbedtls_platform_zeroize 2018-04-17 10:00:21 -05:00
memory_buffer_alloc.c Fix braces in mbedtls_memory_buffer_alloc_status() 2018-06-12 16:56:04 +01:00
net_sockets.c Merge remote-tracking branch 'public/pr/1198' into development 2018-07-24 17:20:17 +01:00
nist_kw.c Add selftests 2018-07-24 16:43:20 +01:00
oid.c pkcs5v2: add support for additional hmacSHA algorithms 2018-02-08 17:18:15 +08:00
padlock.c
pem.c Rename mbedtls_zeroize to mbedtls_platform_zeroize 2018-04-17 10:00:21 -05:00
pk_wrap.c Rename mbedtls_zeroize to mbedtls_platform_zeroize 2018-04-17 10:00:21 -05:00
pk.c Rename mbedtls_zeroize to mbedtls_platform_zeroize 2018-04-17 10:00:21 -05:00
pkcs5.c Treat warnings as errors for IAR 2018-05-25 14:54:14 +01:00
pkcs11.c
pkcs12.c Rename mbedtls_zeroize to mbedtls_platform_zeroize 2018-04-17 10:00:21 -05:00
pkparse.c Remove unnecessary mark as unused #1098 2018-07-11 15:16:53 +02:00
pkwrite.c
platform_util.c Don't declare and define gmtime()-mutex on Windows platforms 2018-09-06 12:09:56 +01:00
platform.c Convert mbedtls_free and mbedtls_calloc into functions 2018-06-13 09:17:59 +01:00
poly1305.c Fix usage of inline with for some compilers 2018-06-07 11:54:17 +02:00
ripemd160.c Rename mbedtls_zeroize to mbedtls_platform_zeroize 2018-04-17 10:00:21 -05:00
rsa_internal.c Add explicit type cast to avoid truncation warning 2018-01-03 09:27:40 +00:00
rsa.c Fix a timing-based Bleichenbacher attack on PKCS#1v1.5 decryption 2018-10-03 01:03:05 +02:00
sha1.c Fix Lucky 13 cache attack on MD/SHA padding 2018-07-05 10:47:00 +02:00
sha256.c Fix Lucky 13 cache attack on MD/SHA padding 2018-07-05 10:47:00 +02:00
sha512.c Fix Lucky 13 cache attack on MD/SHA padding 2018-07-05 10:47:00 +02:00
ssl_cache.c Address PR review comments 2017-10-29 17:53:52 +02:00
ssl_ciphersuites.c Merge remote-tracking branch 'upstream-public/pr/1378' into development 2018-08-10 10:59:53 +01:00
ssl_cli.c Merge remote-tracking branch 'public/pr/1988' into development 2018-08-30 00:57:28 +01:00
ssl_cookie.c Rename mbedtls_zeroize to mbedtls_platform_zeroize 2018-04-17 10:00:21 -05:00
ssl_srv.c Style: Add numerous comments indicating condition guarded by #endif 2018-08-28 10:13:29 +01:00
ssl_ticket.c Rename mbedtls_zeroize to mbedtls_platform_zeroize 2018-04-17 10:00:21 -05:00
ssl_tls.c Merge branch 'development' into development 2018-08-30 01:11:35 +01:00
threading.c Don't declare and define gmtime()-mutex on Windows platforms 2018-09-06 12:09:56 +01:00
timing.c library: Port to Haiku. 2018-04-11 20:27:32 -04:00
version_features.c Key wrapping API definition 2018-07-24 16:43:20 +01:00
version.c
x509_create.c
x509_crl.c Rename mbedtls_zeroize to mbedtls_platform_zeroize 2018-04-17 10:00:21 -05:00
x509_crt.c Merge remote-tracking branch 'restricted/pr/470' into development-restricted 2018-08-28 15:26:11 +01:00
x509_csr.c Merge remote-tracking branch 'public/pr/1621' into development 2018-06-28 12:09:15 +01:00
x509.c Rename mbedtls_platform_gmtime() to mbedtls_platform_gmtime_r() 2018-09-05 15:06:19 +01:00
x509write_crt.c Rename mbedtls_zeroize to mbedtls_platform_zeroize 2018-04-17 10:00:21 -05:00
x509write_csr.c Rename mbedtls_zeroize to mbedtls_platform_zeroize 2018-04-17 10:00:21 -05:00
xtea.c Rename mbedtls_zeroize to mbedtls_platform_zeroize 2018-04-17 10:00:21 -05:00