diff options
Diffstat (limited to 'meta/recipes-support/gnutls/gnutls/CVE-2023-0361.patch')
-rw-r--r-- | meta/recipes-support/gnutls/gnutls/CVE-2023-0361.patch | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/meta/recipes-support/gnutls/gnutls/CVE-2023-0361.patch b/meta/recipes-support/gnutls/gnutls/CVE-2023-0361.patch new file mode 100644 index 0000000000..943f4ca704 --- /dev/null +++ b/meta/recipes-support/gnutls/gnutls/CVE-2023-0361.patch | |||
@@ -0,0 +1,85 @@ | |||
1 | From 80a6ce8ddb02477cd724cd5b2944791aaddb702a Mon Sep 17 00:00:00 2001 | ||
2 | From: Alexander Sosedkin <asosedkin@redhat.com> | ||
3 | Date: Tue, 9 Aug 2022 16:05:53 +0200 | ||
4 | Subject: [PATCH] auth/rsa: side-step potential side-channel | ||
5 | |||
6 | Signed-off-by: Alexander Sosedkin <asosedkin@redhat.com> | ||
7 | Signed-off-by: Hubert Kario <hkario@redhat.com> | ||
8 | Tested-by: Hubert Kario <hkario@redhat.com> | ||
9 | Upstream-Status: Backport [https://gitlab.com/gnutls/gnutls/-/commit/80a6ce8ddb02477cd724cd5b2944791aaddb702a | ||
10 | https://gitlab.com/gnutls/gnutls/-/commit/4b7ff428291c7ed77c6d2635577c83a43bbae558] | ||
11 | CVE: CVE-2023-0361 | ||
12 | Signed-off-by: Vivek Kumbhar <vkumbhar@mvista.com> | ||
13 | --- | ||
14 | lib/auth/rsa.c | 30 +++--------------------------- | ||
15 | 1 file changed, 3 insertions(+), 27 deletions(-) | ||
16 | |||
17 | diff --git a/lib/auth/rsa.c b/lib/auth/rsa.c | ||
18 | index 8108ee8..858701f 100644 | ||
19 | --- a/lib/auth/rsa.c | ||
20 | +++ b/lib/auth/rsa.c | ||
21 | @@ -155,13 +155,10 @@ static int | ||
22 | proc_rsa_client_kx(gnutls_session_t session, uint8_t * data, | ||
23 | size_t _data_size) | ||
24 | { | ||
25 | - const char attack_error[] = "auth_rsa: Possible PKCS #1 attack\n"; | ||
26 | gnutls_datum_t ciphertext; | ||
27 | int ret, dsize; | ||
28 | ssize_t data_size = _data_size; | ||
29 | volatile uint8_t ver_maj, ver_min; | ||
30 | - volatile uint8_t check_ver_min; | ||
31 | - volatile uint32_t ok; | ||
32 | |||
33 | #ifdef ENABLE_SSL3 | ||
34 | if (get_num_version(session) == GNUTLS_SSL3) { | ||
35 | @@ -187,7 +184,6 @@ proc_rsa_client_kx(gnutls_session_t session, uint8_t * data, | ||
36 | |||
37 | ver_maj = _gnutls_get_adv_version_major(session); | ||
38 | ver_min = _gnutls_get_adv_version_minor(session); | ||
39 | - check_ver_min = (session->internals.allow_wrong_pms == 0); | ||
40 | |||
41 | session->key.key.data = gnutls_malloc(GNUTLS_MASTER_SIZE); | ||
42 | if (session->key.key.data == NULL) { | ||
43 | @@ -206,10 +202,9 @@ proc_rsa_client_kx(gnutls_session_t session, uint8_t * data, | ||
44 | return ret; | ||
45 | } | ||
46 | |||
47 | - ret = | ||
48 | - gnutls_privkey_decrypt_data2(session->internals.selected_key, | ||
49 | - 0, &ciphertext, session->key.key.data, | ||
50 | - session->key.key.size); | ||
51 | + gnutls_privkey_decrypt_data2(session->internals.selected_key, | ||
52 | + 0, &ciphertext, session->key.key.data, | ||
53 | + session->key.key.size); | ||
54 | /* After this point, any conditional on failure that cause differences | ||
55 | * in execution may create a timing or cache access pattern side | ||
56 | * channel that can be used as an oracle, so treat very carefully */ | ||
57 | @@ -225,25 +220,6 @@ proc_rsa_client_kx(gnutls_session_t session, uint8_t * data, | ||
58 | * Vlastimil Klima, Ondej Pokorny and Tomas Rosa. | ||
59 | */ | ||
60 | |||
61 | - /* ok is 0 in case of error and 1 in case of success. */ | ||
62 | - | ||
63 | - /* if ret < 0 */ | ||
64 | - ok = CONSTCHECK_EQUAL(ret, 0); | ||
65 | - /* session->key.key.data[0] must equal ver_maj */ | ||
66 | - ok &= CONSTCHECK_EQUAL(session->key.key.data[0], ver_maj); | ||
67 | - /* if check_ver_min then session->key.key.data[1] must equal ver_min */ | ||
68 | - ok &= CONSTCHECK_NOT_EQUAL(check_ver_min, 0) & | ||
69 | - CONSTCHECK_EQUAL(session->key.key.data[1], ver_min); | ||
70 | - | ||
71 | - if (ok) { | ||
72 | - /* call logging function unconditionally so all branches are | ||
73 | - * indistinguishable for timing and cache access when debug | ||
74 | - * logging is disabled */ | ||
75 | - _gnutls_no_log("%s", attack_error); | ||
76 | - } else { | ||
77 | - _gnutls_debug_log("%s", attack_error); | ||
78 | - } | ||
79 | - | ||
80 | /* This is here to avoid the version check attack | ||
81 | * discussed above. | ||
82 | */ | ||
83 | -- | ||
84 | 2.25.1 | ||
85 | |||