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authorColin Percival <cperciva@FreeBSD.org>2006-09-28 13:06:23 +0000
committerColin Percival <cperciva@FreeBSD.org>2006-09-28 13:06:23 +0000
commit30a6ffb3330a4ce39d12906a7dda5c4d9ed91dc3 (patch)
treedd781c2038cbc6db2809f44aae4144784fa53814 /crypto/openssl/crypto/dsa/dsa_ossl.c
parentb55396780782c474e291f8557a14c033f4c6941d (diff)
downloadsrc-30a6ffb3330a4ce39d12906a7dda5c4d9ed91dc3.tar.gz
src-30a6ffb3330a4ce39d12906a7dda5c4d9ed91dc3.zip
Correct multiple vulnerabilities in crypto(3).
Limit the size of public keys used in order to protect applications from a denial of service via insane key sizes. Security: FreeBSD-SA-06:23.openssl Approved by: so (cperciva)
Notes
Notes: svn path=/releng/4.11/; revision=162724
Diffstat (limited to 'crypto/openssl/crypto/dsa/dsa_ossl.c')
-rw-r--r--crypto/openssl/crypto/dsa/dsa_ossl.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/crypto/openssl/crypto/dsa/dsa_ossl.c b/crypto/openssl/crypto/dsa/dsa_ossl.c
index b9e7f3ea5c66..1dfbc250d2b0 100644
--- a/crypto/openssl/crypto/dsa/dsa_ossl.c
+++ b/crypto/openssl/crypto/dsa/dsa_ossl.c
@@ -244,6 +244,18 @@ static int dsa_do_verify(const unsigned char *dgst, int dgst_len, DSA_SIG *sig,
return -1;
}
+ if (BN_num_bits(dsa->q) != 160)
+ {
+ DSAerr(DSA_F_DSA_DO_VERIFY,DSA_R_BAD_Q_VALUE);
+ return -1;
+ }
+
+ if (BN_num_bits(dsa->p) > OPENSSL_DSA_MAX_MODULUS_BITS)
+ {
+ DSAerr(DSA_F_DSA_DO_VERIFY,DSA_R_MODULUS_TOO_LARGE);
+ return -1;
+ }
+
BN_init(&u1);
BN_init(&u2);
BN_init(&t1);