diff options
| author | Mark J. Cox <mark@openssl.org> | 2006-09-28 11:29:03 +0000 |
|---|---|---|
| committer | Mark J. Cox <mark@openssl.org> | 2006-09-28 11:29:03 +0000 |
| commit | 951dfbb13a79bff82cef8096d2c93bc2d65a7525 (patch) | |
| tree | abc7f989e18378c7c06a5eecf6f23257fb42f53a /crypto/dsa/dsa_ossl.c | |
| parent | 81780a3b6290836f3ef64eafe7143e892e7fa5cc (diff) | |
Introduce limits to prevent malicious keys being able to
cause a denial of service. (CVE-2006-2940)
[Steve Henson, Bodo Moeller]
Fix ASN.1 parsing of certain invalid structures that can result
in a denial of service. (CVE-2006-2937) [Steve Henson]
Fix buffer overflow in SSL_get_shared_ciphers() function.
(CVE-2006-3738) [Tavis Ormandy and Will Drewry, Google Security Team]
Fix SSL client code which could crash if connecting to a
malicious SSLv2 server. (CVE-2006-4343)
[Tavis Ormandy and Will Drewry, Google Security Team]
Diffstat (limited to 'crypto/dsa/dsa_ossl.c')
| -rw-r--r-- | crypto/dsa/dsa_ossl.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/crypto/dsa/dsa_ossl.c b/crypto/dsa/dsa_ossl.c index 3fd8a35613..e6aad85825 100644 --- a/crypto/dsa/dsa_ossl.c +++ b/crypto/dsa/dsa_ossl.c @@ -304,6 +304,18 @@ 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); |