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| author | Colin Percival <cperciva@FreeBSD.org> | 2006-09-28 13:06:23 +0000 |
|---|---|---|
| committer | Colin Percival <cperciva@FreeBSD.org> | 2006-09-28 13:06:23 +0000 |
| commit | 30a6ffb3330a4ce39d12906a7dda5c4d9ed91dc3 (patch) | |
| tree | dd781c2038cbc6db2809f44aae4144784fa53814 /crypto/openssl/crypto/dsa/dsa_ossl.c | |
| parent | b55396780782c474e291f8557a14c033f4c6941d (diff) | |
| download | src-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.c | 12 |
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); |