Security update for openssl SUSE Patch security@suse.de SUSE Security Team SUSE-SU-2016:0638-1 Final 1 1 2016-03-02T18:39:01Z current 2016-03-02T18:39:01Z 2016-03-02T18:39:01Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for openssl This update for openssl fixes various security issues: Security issues fixed: - CVE-2016-0800 aka the 'DROWN' attack (bsc#968046): OpenSSL was vulnerable to a cross-protocol attack that could lead to decryption of TLS sessions by using a server supporting SSLv2 and EXPORT cipher suites as a Bleichenbacher RSA padding oracle. This update changes the openssl library to: * Disable SSLv2 protocol support by default. This can be overridden by setting the environment variable 'OPENSSL_ALLOW_SSL2' or by using SSL_CTX_clear_options using the SSL_OP_NO_SSLv2 flag. Note that various services and clients had already disabled SSL protocol 2 by default previously. * Disable all weak EXPORT ciphers by default. These can be reenabled if required by old legacy software using the environment variable 'OPENSSL_ALLOW_EXPORT'. - CVE-2016-0702 aka the 'CacheBleed' attack. (bsc#968050) Various changes in the modular exponentation code were added that make sure that it is not possible to recover RSA secret keys by analyzing cache-bank conflicts on the Intel Sandy-Bridge microarchitecture. Note that this was only exploitable if the malicious code was running on the same hyper threaded Intel Sandy Bridge processor as the victim thread performing decryptions. - CVE-2016-0705 (bnc#968047): A double free() bug in the DSA ASN1 parser code was fixed that could be abused to facilitate a denial-of-service attack. - CVE-2016-0797 (bnc#968048): The BN_hex2bn() and BN_dec2bn() functions had a bug that could result in an attempt to de-reference a NULL pointer leading to crashes. This could have security consequences if these functions were ever called by user applications with large untrusted hex/decimal data. Also, internal usage of these functions in OpenSSL uses data from config files or application command line arguments. If user developed applications generated config file data based on untrusted data, then this could have had security consequences as well. - CVE-2016-0798 (bnc#968265) The SRP user database lookup method SRP_VBASE_get_by_user() had a memory leak that attackers could abuse to facility DoS attacks. To mitigate the issue, the seed handling in SRP_VBASE_get_by_user() was disabled even if the user has configured a seed. Applications are advised to migrate to SRP_VBASE_get1_by_user(). - CVE-2016-0799 (bnc#968374) On many 64 bit systems, the internal fmtstr() and doapr_outch() functions could miscalculate the length of a string and attempt to access out-of-bounds memory locations. These problems could have enabled attacks where large amounts of untrusted data is passed to the BIO_*printf functions. If applications use these functions in this way then they could have been vulnerable. OpenSSL itself uses these functions when printing out human-readable dumps of ASN.1 data. Therefore applications that print this data could have been vulnerable if the data is from untrusted sources. OpenSSL command line applications could also have been vulnerable when they print out ASN.1 data, or if untrusted data is passed as command line arguments. Libssl is not considered directly vulnerable. - CVE-2015-3197 (bsc#963415): The SSLv2 protocol did not block disabled ciphers. Note that the March 1st 2016 release also references following CVEs that were fixed by us with CVE-2015-0293 in 2015: - CVE-2016-0703 (bsc#968051): This issue only affected versions of OpenSSL prior to March 19th 2015 at which time the code was refactored to address vulnerability CVE-2015-0293. It would have made the above 'DROWN' attack much easier. - CVE-2016-0704 (bsc#968053): 'Bleichenbacher oracle in SSLv2' This issue only affected versions of OpenSSL prior to March 19th 2015 at which time the code was refactored to address vulnerability CVE-2015-0293. It would have made the above 'DROWN' attack much easier. The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) https://www.suse.com/support/update/announcement/2016/suse-su-20160638-1/ Link for SUSE-SU-2016:0638-1 E-Mail link for SUSE-SU-2016:0638-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings libopenssl-devel-1.0.1k-11.84.1 libopenssl-devel-32bit-1.0.1k-11.84.1 libopenssl1_0_0-1.0.1k-11.84.1 libopenssl1_0_0-32bit-1.0.1k-11.84.1 openssl-1.0.1k-11.84.1 openssl-doc-1.0.1k-11.84.1 The SSLv2 implementation in OpenSSL before 0.9.8zf, 1.0.0 before 1.0.0r, 1.0.1 before 1.0.1m, and 1.0.2 before 1.0.2a allows remote attackers to cause a denial of service (s2_lib.c assertion failure and daemon exit) via a crafted CLIENT-MASTER-KEY message. CVE-2015-0293 critical Please Install the update. https://www.suse.com/support/update/announcement/2016/suse-su-20160638-1/ https://www.suse.com/security/cve/CVE-2015-0293.html CVE-2015-0293 https://bugzilla.suse.com/919648 SUSE Bug 919648 https://bugzilla.suse.com/922488 SUSE Bug 922488 https://bugzilla.suse.com/936586 SUSE Bug 936586 https://bugzilla.suse.com/968044 SUSE Bug 968044 https://bugzilla.suse.com/968051 SUSE Bug 968051 https://bugzilla.suse.com/968053 SUSE Bug 968053 https://bugzilla.suse.com/986238 SUSE Bug 986238 ssl/s2_srvr.c in OpenSSL 1.0.1 before 1.0.1r and 1.0.2 before 1.0.2f does not prevent use of disabled ciphers, which makes it easier for man-in-the-middle attackers to defeat cryptographic protection mechanisms by performing computations on SSLv2 traffic, related to the get_client_master_key and get_client_hello functions. CVE-2015-3197 low 4.3 AV:N/AC:M/Au:N/C:P/I:N/A:N Please Install the update. https://www.suse.com/support/update/announcement/2016/suse-su-20160638-1/ https://www.suse.com/security/cve/CVE-2015-3197.html CVE-2015-3197 https://bugzilla.suse.com/963410 SUSE Bug 963410 https://bugzilla.suse.com/963415 SUSE Bug 963415 https://bugzilla.suse.com/968044 SUSE Bug 968044 https://bugzilla.suse.com/968046 SUSE Bug 968046 The MOD_EXP_CTIME_COPY_FROM_PREBUF function in crypto/bn/bn_exp.c in OpenSSL 1.0.1 before 1.0.1s and 1.0.2 before 1.0.2g does not properly consider cache-bank access times during modular exponentiation, which makes it easier for local users to discover RSA keys by running a crafted application on the same Intel Sandy Bridge CPU core as a victim and leveraging cache-bank conflicts, aka a "CacheBleed" attack. CVE-2016-0702 low Please Install the update. https://www.suse.com/support/update/announcement/2016/suse-su-20160638-1/ https://www.suse.com/security/cve/CVE-2016-0702.html CVE-2016-0702 https://bugzilla.suse.com/1007806 SUSE Bug 1007806 https://bugzilla.suse.com/968044 SUSE Bug 968044 https://bugzilla.suse.com/968050 SUSE Bug 968050 https://bugzilla.suse.com/971238 SUSE Bug 971238 https://bugzilla.suse.com/990370 SUSE Bug 990370 The get_client_master_key function in s2_srvr.c in the SSLv2 implementation in OpenSSL before 0.9.8zf, 1.0.0 before 1.0.0r, 1.0.1 before 1.0.1m, and 1.0.2 before 1.0.2a accepts a nonzero CLIENT-MASTER-KEY CLEAR-KEY-LENGTH value for an arbitrary cipher, which allows man-in-the-middle attackers to determine the MASTER-KEY value and decrypt TLS ciphertext data by leveraging a Bleichenbacher RSA padding oracle, a related issue to CVE-2016-0800. CVE-2016-0703 moderate Please Install the update. https://www.suse.com/support/update/announcement/2016/suse-su-20160638-1/ https://www.suse.com/security/cve/CVE-2016-0703.html CVE-2016-0703 https://bugzilla.suse.com/968044 SUSE Bug 968044 https://bugzilla.suse.com/968046 SUSE Bug 968046 https://bugzilla.suse.com/968051 SUSE Bug 968051 https://bugzilla.suse.com/986238 SUSE Bug 986238 An oracle protection mechanism in the get_client_master_key function in s2_srvr.c in the SSLv2 implementation in OpenSSL before 0.9.8zf, 1.0.0 before 1.0.0r, 1.0.1 before 1.0.1m, and 1.0.2 before 1.0.2a overwrites incorrect MASTER-KEY bytes during use of export cipher suites, which makes it easier for remote attackers to decrypt TLS ciphertext data by leveraging a Bleichenbacher RSA padding oracle, a related issue to CVE-2016-0800. CVE-2016-0704 moderate Please Install the update. https://www.suse.com/support/update/announcement/2016/suse-su-20160638-1/ https://www.suse.com/security/cve/CVE-2016-0704.html CVE-2016-0704 https://bugzilla.suse.com/968044 SUSE Bug 968044 https://bugzilla.suse.com/968053 SUSE Bug 968053 https://bugzilla.suse.com/986238 SUSE Bug 986238 Double free vulnerability in the dsa_priv_decode function in crypto/dsa/dsa_ameth.c in OpenSSL 1.0.1 before 1.0.1s and 1.0.2 before 1.0.2g allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via a malformed DSA private key. CVE-2016-0705 low Please Install the update. https://www.suse.com/support/update/announcement/2016/suse-su-20160638-1/ https://www.suse.com/security/cve/CVE-2016-0705.html CVE-2016-0705 https://bugzilla.suse.com/968044 SUSE Bug 968044 https://bugzilla.suse.com/968047 SUSE Bug 968047 https://bugzilla.suse.com/971238 SUSE Bug 971238 https://bugzilla.suse.com/976341 SUSE Bug 976341 Multiple integer overflows in OpenSSL 1.0.1 before 1.0.1s and 1.0.2 before 1.0.2g allow remote attackers to cause a denial of service (heap memory corruption or NULL pointer dereference) or possibly have unspecified other impact via a long digit string that is mishandled by the (1) BN_dec2bn or (2) BN_hex2bn function, related to crypto/bn/bn.h and crypto/bn/bn_print.c. CVE-2016-0797 moderate Please Install the update. https://www.suse.com/support/update/announcement/2016/suse-su-20160638-1/ https://www.suse.com/security/cve/CVE-2016-0797.html CVE-2016-0797 https://bugzilla.suse.com/968044 SUSE Bug 968044 https://bugzilla.suse.com/968048 SUSE Bug 968048 https://bugzilla.suse.com/990370 SUSE Bug 990370 Memory leak in the SRP_VBASE_get_by_user implementation in OpenSSL 1.0.1 before 1.0.1s and 1.0.2 before 1.0.2g allows remote attackers to cause a denial of service (memory consumption) by providing an invalid username in a connection attempt, related to apps/s_server.c and crypto/srp/srp_vfy.c. CVE-2016-0798 moderate Please Install the update. https://www.suse.com/support/update/announcement/2016/suse-su-20160638-1/ https://www.suse.com/security/cve/CVE-2016-0798.html CVE-2016-0798 https://bugzilla.suse.com/968044 SUSE Bug 968044 https://bugzilla.suse.com/968265 SUSE Bug 968265 The fmtstr function in crypto/bio/b_print.c in OpenSSL 1.0.1 before 1.0.1s and 1.0.2 before 1.0.2g improperly calculates string lengths, which allows remote attackers to cause a denial of service (overflow and out-of-bounds read) or possibly have unspecified other impact via a long string, as demonstrated by a large amount of ASN.1 data, a different vulnerability than CVE-2016-2842. CVE-2016-0799 moderate 2.6 AV:N/AC:H/Au:N/C:N/I:N/A:P Please Install the update. https://www.suse.com/support/update/announcement/2016/suse-su-20160638-1/ https://www.suse.com/security/cve/CVE-2016-0799.html CVE-2016-0799 https://bugzilla.suse.com/968044 SUSE Bug 968044 https://bugzilla.suse.com/968374 SUSE Bug 968374 https://bugzilla.suse.com/969517 SUSE Bug 969517 https://bugzilla.suse.com/989345 SUSE Bug 989345 https://bugzilla.suse.com/990370 SUSE Bug 990370 https://bugzilla.suse.com/991722 SUSE Bug 991722 The SSLv2 protocol, as used in OpenSSL before 1.0.1s and 1.0.2 before 1.0.2g and other products, requires a server to send a ServerVerify message before establishing that a client possesses certain plaintext RSA data, which makes it easier for remote attackers to decrypt TLS ciphertext data by leveraging a Bleichenbacher RSA padding oracle, aka a "DROWN" attack. CVE-2016-0800 moderate Please Install the update. https://www.suse.com/support/update/announcement/2016/suse-su-20160638-1/ https://www.suse.com/security/cve/CVE-2016-0800.html CVE-2016-0800 https://bugzilla.suse.com/1106871 SUSE Bug 1106871 https://bugzilla.suse.com/961377 SUSE Bug 961377 https://bugzilla.suse.com/968044 SUSE Bug 968044 https://bugzilla.suse.com/968046 SUSE Bug 968046 https://bugzilla.suse.com/968888 SUSE Bug 968888 https://bugzilla.suse.com/979060 SUSE Bug 979060