diff options
Diffstat (limited to 'meta/recipes-support/nettle/nettle-3.5.1/CVE-2021-3580_2.patch')
| -rw-r--r-- | meta/recipes-support/nettle/nettle-3.5.1/CVE-2021-3580_2.patch | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/meta/recipes-support/nettle/nettle-3.5.1/CVE-2021-3580_2.patch b/meta/recipes-support/nettle/nettle-3.5.1/CVE-2021-3580_2.patch new file mode 100644 index 0000000000..18e952ddf7 --- /dev/null +++ b/meta/recipes-support/nettle/nettle-3.5.1/CVE-2021-3580_2.patch @@ -0,0 +1,163 @@ +From c80961c646b0962ab152619ac0a7c6a21850a380 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Niels=20M=C3=B6ller?= <nisse@lysator.liu.se> +Date: Tue, 8 Jun 2021 21:32:38 +0200 +Subject: [PATCH 2/2] Add input check to rsa_decrypt family of functions. + +(cherry picked from commit 0ad0b5df315665250dfdaa4a1e087f4799edaefe) + +Upstream-Status: Backport +CVE: CVE-2021-3580 +Signed-off-by: Armin Kuster <akuster@mvista.com> + +--- + ChangeLog | 10 +++++++++- + rsa-decrypt-tr.c | 4 ++++ + rsa-decrypt.c | 10 ++++++++++ + rsa-sec-decrypt.c | 4 ++++ + rsa.h | 5 +++-- + testsuite/rsa-encrypt-test.c | 38 ++++++++++++++++++++++++++++++------ + 6 files changed, 62 insertions(+), 9 deletions(-) + +Index: nettle-3.5.1/rsa-decrypt-tr.c +=================================================================== +--- nettle-3.5.1.orig/rsa-decrypt-tr.c ++++ nettle-3.5.1/rsa-decrypt-tr.c +@@ -52,6 +52,10 @@ rsa_decrypt_tr(const struct rsa_public_k + mp_size_t key_limb_size; + int res; + ++ /* First check that input is in range. */ ++ if (mpz_sgn (gibberish) < 0 || mpz_cmp (gibberish, pub->n) >= 0) ++ return 0; ++ + key_limb_size = mpz_size(pub->n); + + TMP_GMP_ALLOC (m, key_limb_size); +Index: nettle-3.5.1/rsa-decrypt.c +=================================================================== +--- nettle-3.5.1.orig/rsa-decrypt.c ++++ nettle-3.5.1/rsa-decrypt.c +@@ -48,6 +48,16 @@ rsa_decrypt(const struct rsa_private_key + int res; + + mpz_init(m); ++ ++ /* First check that input is in range. Since we don't have the ++ public key available here, we need to reconstruct n. */ ++ mpz_mul (m, key->p, key->q); ++ if (mpz_sgn (gibberish) < 0 || mpz_cmp (gibberish, m) >= 0) ++ { ++ mpz_clear (m); ++ return 0; ++ } ++ + rsa_compute_root(key, m, gibberish); + + res = pkcs1_decrypt (key->size, m, length, message); +Index: nettle-3.5.1/rsa-sec-decrypt.c +=================================================================== +--- nettle-3.5.1.orig/rsa-sec-decrypt.c ++++ nettle-3.5.1/rsa-sec-decrypt.c +@@ -55,6 +55,10 @@ rsa_sec_decrypt(const struct rsa_public_ + TMP_GMP_DECL (em, uint8_t); + int res; + ++ /* First check that input is in range. */ ++ if (mpz_sgn (gibberish) < 0 || mpz_cmp (gibberish, pub->n) >= 0) ++ return 0; ++ + TMP_GMP_ALLOC (m, mpz_size(pub->n)); + TMP_GMP_ALLOC (em, key->size); + +Index: nettle-3.5.1/rsa.h +=================================================================== +--- nettle-3.5.1.orig/rsa.h ++++ nettle-3.5.1/rsa.h +@@ -428,13 +428,14 @@ rsa_sec_decrypt(const struct rsa_public_ + size_t length, uint8_t *message, + const mpz_t gibberish); + +-/* Compute x, the e:th root of m. Calling it with x == m is allowed. */ ++/* Compute x, the e:th root of m. Calling it with x == m is allowed. ++ It is required that 0 <= m < n. */ + void + rsa_compute_root(const struct rsa_private_key *key, + mpz_t x, const mpz_t m); + + /* Safer variant, using RSA blinding, and checking the result after +- CRT. */ ++ CRT. It is required that 0 <= m < n. */ + int + rsa_compute_root_tr(const struct rsa_public_key *pub, + const struct rsa_private_key *key, +Index: nettle-3.5.1/testsuite/rsa-encrypt-test.c +=================================================================== +--- nettle-3.5.1.orig/testsuite/rsa-encrypt-test.c ++++ nettle-3.5.1/testsuite/rsa-encrypt-test.c +@@ -19,11 +19,12 @@ test_main(void) + uint8_t after; + + mpz_t gibberish; +- mpz_t zero; ++ mpz_t bad_input; + + rsa_private_key_init(&key); + rsa_public_key_init(&pub); + mpz_init(gibberish); ++ mpz_init(bad_input); + + knuth_lfib_init(&lfib, 17); + +@@ -103,15 +104,40 @@ test_main(void) + ASSERT(decrypted[0] == 'A'); + + /* Test zero input. */ +- mpz_init_set_ui (zero, 0); ++ mpz_set_ui (bad_input, 0); + decrypted_length = msg_length; +- ASSERT(!rsa_decrypt(&key, &decrypted_length, decrypted, zero)); ++ ASSERT(!rsa_decrypt(&key, &decrypted_length, decrypted, bad_input)); + ASSERT(!rsa_decrypt_tr(&pub, &key, + &lfib, (nettle_random_func *) knuth_lfib_random, +- &decrypted_length, decrypted, zero)); ++ &decrypted_length, decrypted, bad_input)); + ASSERT(!rsa_sec_decrypt(&pub, &key, + &lfib, (nettle_random_func *) knuth_lfib_random, +- decrypted_length, decrypted, zero)); ++ decrypted_length, decrypted, bad_input)); ++ ASSERT(decrypted_length == msg_length); ++ ++ /* Test input that is slightly larger than n */ ++ mpz_add(bad_input, gibberish, pub.n); ++ decrypted_length = msg_length; ++ ASSERT(!rsa_decrypt(&key, &decrypted_length, decrypted, bad_input)); ++ ASSERT(!rsa_decrypt_tr(&pub, &key, ++ &lfib, (nettle_random_func *) knuth_lfib_random, ++ &decrypted_length, decrypted, bad_input)); ++ ASSERT(!rsa_sec_decrypt(&pub, &key, ++ &lfib, (nettle_random_func *) knuth_lfib_random, ++ decrypted_length, decrypted, bad_input)); ++ ASSERT(decrypted_length == msg_length); ++ ++ /* Test input that is considerably larger than n */ ++ mpz_mul_2exp (bad_input, pub.n, 100); ++ mpz_add (bad_input, bad_input, gibberish); ++ decrypted_length = msg_length; ++ ASSERT(!rsa_decrypt(&key, &decrypted_length, decrypted, bad_input)); ++ ASSERT(!rsa_decrypt_tr(&pub, &key, ++ &lfib, (nettle_random_func *) knuth_lfib_random, ++ &decrypted_length, decrypted, bad_input)); ++ ASSERT(!rsa_sec_decrypt(&pub, &key, ++ &lfib, (nettle_random_func *) knuth_lfib_random, ++ decrypted_length, decrypted, bad_input)); + ASSERT(decrypted_length == msg_length); + + /* Test invalid key. */ +@@ -124,6 +150,6 @@ test_main(void) + rsa_private_key_clear(&key); + rsa_public_key_clear(&pub); + mpz_clear(gibberish); +- mpz_clear(zero); ++ mpz_clear(bad_input); + free(decrypted); + } |