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authorRichard Purdie <richard.purdie@linuxfoundation.org>2017-03-02 12:24:31 +0000
committerRichard Purdie <richard.purdie@linuxfoundation.org>2017-03-02 12:30:01 +0000
commit8ba70a1c28a4e0ee73db5308b38abc923b0be44d (patch)
tree0ed9bff8e4bd70766c81dbb559d32781bdd93ce8 /recipes-support/gnupg/gnupg-1.4.7/CVE-2013-4576.patch
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Create meta-gplv2 from files from OE-Core
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Diffstat (limited to 'recipes-support/gnupg/gnupg-1.4.7/CVE-2013-4576.patch')
-rw-r--r--recipes-support/gnupg/gnupg-1.4.7/CVE-2013-4576.patch154
1 files changed, 154 insertions, 0 deletions
diff --git a/recipes-support/gnupg/gnupg-1.4.7/CVE-2013-4576.patch b/recipes-support/gnupg/gnupg-1.4.7/CVE-2013-4576.patch
new file mode 100644
index 0000000..5dcde1f
--- /dev/null
+++ b/recipes-support/gnupg/gnupg-1.4.7/CVE-2013-4576.patch
@@ -0,0 +1,154 @@
+Upstream-Status: Backport
+CVE: CVE-2013-4576
+
+Index: gnupg-1.4.7/cipher/dsa.c
+===================================================================
+--- gnupg-1.4.7.orig/cipher/dsa.c 2006-12-12 02:27:21.000000000 +0800
++++ gnupg-1.4.7/cipher/dsa.c 2014-01-23 11:30:17.300915919 +0800
+@@ -287,6 +287,8 @@
+ MPI kinv;
+ MPI tmp;
+
++ mpi_normalize (hash);
++
+ /* select a random k with 0 < k < q */
+ k = gen_k( skey->q );
+
+Index: gnupg-1.4.7/cipher/elgamal.c
+===================================================================
+--- gnupg-1.4.7.orig/cipher/elgamal.c 2006-12-12 03:08:05.000000000 +0800
++++ gnupg-1.4.7/cipher/elgamal.c 2014-01-23 11:30:17.300915919 +0800
+@@ -376,6 +376,9 @@
+ {
+ MPI t1 = mpi_alloc_secure( mpi_get_nlimbs( skey->p ) );
+
++ mpi_normalize (a);
++ mpi_normalize (b);
++
+ /* output = b/(a^x) mod p */
+ mpi_powm( t1, a, skey->x, skey->p );
+ mpi_invm( t1, t1, skey->p );
+Index: gnupg-1.4.7/cipher/random.c
+===================================================================
+--- gnupg-1.4.7.orig/cipher/random.c 2006-11-03 18:09:39.000000000 +0800
++++ gnupg-1.4.7/cipher/random.c 2014-01-23 11:31:53.993495462 +0800
+@@ -273,6 +273,18 @@
+ }
+
+
++/* Randomize the MPI */
++void
++randomize_mpi (MPI mpi, size_t nbits, int level)
++{
++ unsigned char *buffer;
++
++ buffer = get_random_bits (nbits, level, mpi_is_secure (mpi));
++ mpi_set_buffer (mpi, buffer, (nbits+7)/8, 0);
++ xfree (buffer);
++}
++
++
+ int
+ random_is_faked()
+ {
+Index: gnupg-1.4.7/cipher/random.h
+===================================================================
+--- gnupg-1.4.7.orig/cipher/random.h 2006-02-09 19:29:29.000000000 +0800
++++ gnupg-1.4.7/cipher/random.h 2014-01-23 11:30:17.300915919 +0800
+@@ -32,6 +32,7 @@
+ int random_is_faked(void);
+ void random_disable_locking (void);
+ void randomize_buffer( byte *buffer, size_t length, int level );
++void randomize_mpi (MPI mpi, size_t nbits, int level);
+ byte *get_random_bits( size_t nbits, int level, int secure );
+ void fast_random_poll( void );
+
+Index: gnupg-1.4.7/cipher/rsa.c
+===================================================================
+--- gnupg-1.4.7.orig/cipher/rsa.c 2006-12-12 03:09:00.000000000 +0800
++++ gnupg-1.4.7/cipher/rsa.c 2014-01-23 11:35:04.330639125 +0800
+@@ -301,9 +301,26 @@
+ #if 0
+ mpi_powm( output, input, skey->d, skey->n );
+ #else
+- MPI m1 = mpi_alloc_secure( mpi_get_nlimbs(skey->n)+1 );
+- MPI m2 = mpi_alloc_secure( mpi_get_nlimbs(skey->n)+1 );
+- MPI h = mpi_alloc_secure( mpi_get_nlimbs(skey->n)+1 );
++ int nlimbs = mpi_get_nlimbs (skey->n)+1;
++ MPI m1 = mpi_alloc_secure (nlimbs);
++ MPI m2 = mpi_alloc_secure (nlimbs);
++ MPI h = mpi_alloc_secure (nlimbs);
++# if 1
++ MPI bdata= mpi_alloc_secure (nlimbs);
++ MPI r = mpi_alloc_secure (nlimbs);
++# endif
++
++ /* Remove superfluous leading zeroes from INPUT. */
++ mpi_normalize (input);
++
++# if 1
++ /* Blind: bdata = (data * r^e) mod n */
++ randomize_mpi (r, mpi_get_nbits (skey->n), 0);
++ mpi_fdiv_r (r, r, skey->n);
++ mpi_powm (bdata, r, skey->e, skey->n);
++ mpi_mulm (bdata, bdata, input, skey->n);
++ input = bdata;
++# endif
+
+ /* m1 = c ^ (d mod (p-1)) mod p */
+ mpi_sub_ui( h, skey->p, 1 );
+@@ -321,8 +338,15 @@
+ /* m = m2 + h * p */
+ mpi_mul ( h, h, skey->p );
+ mpi_add ( output, m1, h );
+- /* ready */
+-
++
++# if 1
++ mpi_free (bdata);
++ /* Unblind: output = (output * r^(-1)) mod n */
++ mpi_invm (r, r, skey->n);
++ mpi_mulm (output, output, r, skey->n);
++ mpi_free (r);
++# endif
++
+ mpi_free ( h );
+ mpi_free ( m1 );
+ mpi_free ( m2 );
+@@ -397,6 +421,7 @@
+ rsa_decrypt( int algo, MPI *result, MPI *data, MPI *skey )
+ {
+ RSA_secret_key sk;
++ MPI input;
+
+ if( algo != 1 && algo != 2 )
+ return G10ERR_PUBKEY_ALGO;
+@@ -407,8 +432,14 @@
+ sk.p = skey[3];
+ sk.q = skey[4];
+ sk.u = skey[5];
+- *result = mpi_alloc_secure( mpi_get_nlimbs( sk.n ) );
+- secret( *result, data[0], &sk );
++
++ /* Mitigates side-channel attacks (CVE-2013-4576). */
++ input = mpi_alloc (0);
++ mpi_normalize (data[0]);
++ mpi_fdiv_r (input, data[0], sk.n);
++ *result = mpi_alloc_secure (mpi_get_nlimbs (sk.n));
++ secret (*result, input, &sk);
++ mpi_free (input);
+ return 0;
+ }
+
+Index: gnupg-1.4.7/g10/gpgv.c
+===================================================================
+--- gnupg-1.4.7.orig/g10/gpgv.c 2006-12-13 19:25:04.000000000 +0800
++++ gnupg-1.4.7/g10/gpgv.c 2014-01-23 11:30:17.300915919 +0800
+@@ -390,6 +390,7 @@
+ void random_dump_stats(void) {}
+ int quick_random_gen( int onoff ) { return -1;}
+ void randomize_buffer( byte *buffer, size_t length, int level ) {}
++void randomize_mpi (MPI mpi, size_t nbits, int level) {}
+ int random_is_faked() { return -1;}
+ byte *get_random_bits( size_t nbits, int level, int secure ) { return NULL;}
+ void set_random_seed_file( const char *name ) {}