| Description: | Summary:
The remote host is missing an update for the 'openssl' package(s) announced via the SUSE-SU-2016:0620-1 advisory.
Vulnerability Insight:
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 re-enabled
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
... [Please see the references for more information on the vulnerabilities]
Affected Software/OS:
'openssl' package(s) on SUSE Linux Enterprise Desktop 12-SP1, SUSE Linux Enterprise Server 12-SP1, SUSE Linux Enterprise Server for SAP Applications 12-SP1.
Solution:
Please install the updated package(s).
CVSS Score:
10.0
CVSS Vector:
AV:N/AC:L/Au:N/C:C/I:C/A:C
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