Date: Wed, 2 Nov 2016 07:23:36 +0000 (UTC) From: Xin LI <delphij@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-releng@freebsd.org Subject: svn commit: r308203 - in releng/10.3: . crypto/openssh crypto/openssl/ssl sys/conf Message-ID: <201611020723.uA27NaTu078319@repo.freebsd.org>
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Author: delphij Date: Wed Nov 2 07:23:36 2016 New Revision: 308203 URL: https://svnweb.freebsd.org/changeset/base/308203 Log: Fix OpenSSH remote Denial of Service vulnerability. [SA-16:33] Fix OpenSSL remote DoS vulnerability. [SA-16:35] Security: FreeBSD-SA-16:33.openssh Security: FreeBSD-SA-16:35.openssl Approved by: so Modified: releng/10.3/UPDATING releng/10.3/crypto/openssh/kex.c releng/10.3/crypto/openssl/ssl/d1_pkt.c releng/10.3/crypto/openssl/ssl/s3_pkt.c releng/10.3/crypto/openssl/ssl/ssl.h releng/10.3/crypto/openssl/ssl/ssl3.h releng/10.3/crypto/openssl/ssl/ssl_locl.h releng/10.3/sys/conf/newvers.sh Modified: releng/10.3/UPDATING ============================================================================== --- releng/10.3/UPDATING Wed Nov 2 07:23:19 2016 (r308202) +++ releng/10.3/UPDATING Wed Nov 2 07:23:36 2016 (r308203) @@ -16,6 +16,13 @@ from older versions of FreeBSD, try WITH stable/10, and then rebuild without this option. The bootstrap process from older version of current is a bit fragile. +20161102 p12 FreeBSD-SA-16:33.openssh + FreeBSD-SA-16:35.openssl + + Fix OpenSSH remote Denial of Service vulnerability. [SA-16:33] + + Fix OpenSSL remote DoS vulnerability. [SA-16:35] + 20161025 p11 FreeBSD-SA-16:15.sysarch [revised] FreeBSD-EN-16:17.vm Modified: releng/10.3/crypto/openssh/kex.c ============================================================================== --- releng/10.3/crypto/openssh/kex.c Wed Nov 2 07:23:19 2016 (r308202) +++ releng/10.3/crypto/openssh/kex.c Wed Nov 2 07:23:36 2016 (r308203) @@ -468,6 +468,7 @@ kex_input_kexinit(int type, u_int32_t se if (kex == NULL) return SSH_ERR_INVALID_ARGUMENT; + ssh_dispatch_set(ssh, SSH2_MSG_KEXINIT, NULL); ptr = sshpkt_ptr(ssh, &dlen); if ((r = sshbuf_put(kex->peer, ptr, dlen)) != 0) return r; Modified: releng/10.3/crypto/openssl/ssl/d1_pkt.c ============================================================================== --- releng/10.3/crypto/openssl/ssl/d1_pkt.c Wed Nov 2 07:23:19 2016 (r308202) +++ releng/10.3/crypto/openssl/ssl/d1_pkt.c Wed Nov 2 07:23:36 2016 (r308203) @@ -924,6 +924,13 @@ int dtls1_read_bytes(SSL *s, int type, u goto start; } + /* + * Reset the count of consecutive warning alerts if we've got a non-empty + * record that isn't an alert. + */ + if (rr->type != SSL3_RT_ALERT && rr->length != 0) + s->s3->alert_count = 0; + /* we now have a packet which can be read and processed */ if (s->s3->change_cipher_spec /* set when we receive ChangeCipherSpec, @@ -1190,6 +1197,14 @@ int dtls1_read_bytes(SSL *s, int type, u if (alert_level == SSL3_AL_WARNING) { s->s3->warn_alert = alert_descr; + + s->s3->alert_count++; + if (s->s3->alert_count == MAX_WARN_ALERT_COUNT) { + al = SSL_AD_UNEXPECTED_MESSAGE; + SSLerr(SSL_F_DTLS1_READ_BYTES, SSL_R_TOO_MANY_WARN_ALERTS); + goto f_err; + } + if (alert_descr == SSL_AD_CLOSE_NOTIFY) { #ifndef OPENSSL_NO_SCTP /* Modified: releng/10.3/crypto/openssl/ssl/s3_pkt.c ============================================================================== --- releng/10.3/crypto/openssl/ssl/s3_pkt.c Wed Nov 2 07:23:19 2016 (r308202) +++ releng/10.3/crypto/openssl/ssl/s3_pkt.c Wed Nov 2 07:23:36 2016 (r308203) @@ -1057,6 +1057,13 @@ int ssl3_read_bytes(SSL *s, int type, un return (ret); } + /* + * Reset the count of consecutive warning alerts if we've got a non-empty + * record that isn't an alert. + */ + if (rr->type != SSL3_RT_ALERT && rr->length != 0) + s->s3->alert_count = 0; + /* we now have a packet which can be read and processed */ if (s->s3->change_cipher_spec /* set when we receive ChangeCipherSpec, @@ -1271,6 +1278,14 @@ int ssl3_read_bytes(SSL *s, int type, un if (alert_level == SSL3_AL_WARNING) { s->s3->warn_alert = alert_descr; + + s->s3->alert_count++; + if (s->s3->alert_count == MAX_WARN_ALERT_COUNT) { + al = SSL_AD_UNEXPECTED_MESSAGE; + SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_TOO_MANY_WARN_ALERTS); + goto f_err; + } + if (alert_descr == SSL_AD_CLOSE_NOTIFY) { s->shutdown |= SSL_RECEIVED_SHUTDOWN; return (0); Modified: releng/10.3/crypto/openssl/ssl/ssl.h ============================================================================== --- releng/10.3/crypto/openssl/ssl/ssl.h Wed Nov 2 07:23:19 2016 (r308202) +++ releng/10.3/crypto/openssl/ssl/ssl.h Wed Nov 2 07:23:36 2016 (r308203) @@ -2717,6 +2717,7 @@ void ERR_load_SSL_strings(void); # define SSL_R_TLS_HEARTBEAT_PENDING 366 # define SSL_R_TLS_ILLEGAL_EXPORTER_LABEL 367 # define SSL_R_TLS_INVALID_ECPOINTFORMAT_LIST 157 +# define SSL_R_TOO_MANY_WARN_ALERTS 409 # define SSL_R_TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST 233 # define SSL_R_TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG 234 # define SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER 235 Modified: releng/10.3/crypto/openssl/ssl/ssl3.h ============================================================================== --- releng/10.3/crypto/openssl/ssl/ssl3.h Wed Nov 2 07:23:19 2016 (r308202) +++ releng/10.3/crypto/openssl/ssl/ssl3.h Wed Nov 2 07:23:36 2016 (r308203) @@ -587,6 +587,8 @@ typedef struct ssl3_state_st { char is_probably_safari; # endif /* !OPENSSL_NO_EC */ # endif /* !OPENSSL_NO_TLSEXT */ + /* Count of the number of consecutive warning alerts received */ + unsigned int alert_count; } SSL3_STATE; # endif Modified: releng/10.3/crypto/openssl/ssl/ssl_locl.h ============================================================================== --- releng/10.3/crypto/openssl/ssl/ssl_locl.h Wed Nov 2 07:23:19 2016 (r308202) +++ releng/10.3/crypto/openssl/ssl/ssl_locl.h Wed Nov 2 07:23:36 2016 (r308203) @@ -389,6 +389,8 @@ */ # define SSL_MAX_DIGEST 6 +# define MAX_WARN_ALERT_COUNT 5 + # define TLS1_PRF_DGST_MASK (0xff << TLS1_PRF_DGST_SHIFT) # define TLS1_PRF_DGST_SHIFT 10 Modified: releng/10.3/sys/conf/newvers.sh ============================================================================== --- releng/10.3/sys/conf/newvers.sh Wed Nov 2 07:23:19 2016 (r308202) +++ releng/10.3/sys/conf/newvers.sh Wed Nov 2 07:23:36 2016 (r308203) @@ -32,7 +32,7 @@ TYPE="FreeBSD" REVISION="10.3" -BRANCH="RELEASE-p11" +BRANCH="RELEASE-p12" if [ "X${BRANCH_OVERRIDE}" != "X" ]; then BRANCH=${BRANCH_OVERRIDE} fi
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