ID de Prueba:	1.3.6.1.4.1.25623.1.0.891418
Categoría:	Debian Local Security Checks
Título:	Debian LTS: Security Advisory for bouncycastle (DLA-1418-1)
Resumen:	Several security vulnerabilities were found in Bouncy;Castle, a Java implementation of cryptographic algorithms.;;CVE-2016-1000338;DSA does not fully validate ASN.1 encoding of signature on;verification. It is possible to inject extra elements in the;sequence making up the signature and still have it validate, which;in some cases may allow the introduction of 'invisible' data into a;signed structure.;;CVE-2016-1000339;Previously the primary engine class used for AES was AESFastEngine.;Due to the highly table driven approach used in the algorithm it;turns out that if the data channel on the CPU can be monitored the;lookup table accesses are sufficient to leak information on the AES;key being used. There was also a leak in AESEngine although it was;substantially less. AESEngine has been modified to remove any signs;of leakage and is now the primary AES class for the BC JCE provider.;Use of AESFastEngine is now only recommended where otherwise deemed;appropriate.;;CVE-2016-1000341;DSA signature generation is vulnerable to timing attack. Where;timings can be closely observed for the generation of signatures,;the lack of blinding may allow an attacker to gain information about;the signature's k value and ultimately the private value as well.;;CVE-2016-1000342;ECDSA does not fully validate ASN.1 encoding of signature on;verification. It is possible to inject extra elements in the;sequence making up the signature and still have it validate, which;in some cases may allow the introduction of 'invisible' data into a;signed structure.;;CVE-2016-1000343;The DSA key pair generator generates a weak private key if used with;default values. If the JCA key pair generator is not explicitly;initialised with DSA parameters, 1.55 and earlier generates a;private value assuming a 1024 bit key size. In earlier releases this;can be dealt with by explicitly passing parameters to the key pair;generator.;;CVE-2016-1000345;The DHIES/ECIES CBC mode is vulnerable to padding oracle attack. In;an environment where timings can be easily observed, it is possible;with enough observations to identify when the decryption is failing;due to padding.;;CVE-2016-1000346;In the Bouncy Castle JCE Provider the other party DH public key is;not fully validated. This can cause issues as invalid keys can be;used to reveal details about the other party's private key where;static Diffie-Hellman is in use. As of this release the key;parameters are checked on agreement calculation.
Descripción:	Summary: Several security vulnerabilities were found in Bouncy Castle, a Java implementation of cryptographic algorithms. CVE-2016-1000338 DSA does not fully validate ASN.1 encoding of signature on verification. It is possible to inject extra elements in the sequence making up the signature and still have it validate, which in some cases may allow the introduction of 'invisible' data into a signed structure. CVE-2016-1000339 Previously the primary engine class used for AES was AESFastEngine. Due to the highly table driven approach used in the algorithm it turns out that if the data channel on the CPU can be monitored the lookup table accesses are sufficient to leak information on the AES key being used. There was also a leak in AESEngine although it was substantially less. AESEngine has been modified to remove any signs of leakage and is now the primary AES class for the BC JCE provider. Use of AESFastEngine is now only recommended where otherwise deemed appropriate. CVE-2016-1000341 DSA signature generation is vulnerable to timing attack. Where timings can be closely observed for the generation of signatures, the lack of blinding may allow an attacker to gain information about the signature's k value and ultimately the private value as well. CVE-2016-1000342 ECDSA does not fully validate ASN.1 encoding of signature on verification. It is possible to inject extra elements in the sequence making up the signature and still have it validate, which in some cases may allow the introduction of 'invisible' data into a signed structure. CVE-2016-1000343 The DSA key pair generator generates a weak private key if used with default values. If the JCA key pair generator is not explicitly initialised with DSA parameters, 1.55 and earlier generates a private value assuming a 1024 bit key size. In earlier releases this can be dealt with by explicitly passing parameters to the key pair generator. CVE-2016-1000345 The DHIES/ECIES CBC mode is vulnerable to padding oracle attack. In an environment where timings can be easily observed, it is possible with enough observations to identify when the decryption is failing due to padding. CVE-2016-1000346 In the Bouncy Castle JCE Provider the other party DH public key is not fully validated. This can cause issues as invalid keys can be used to reveal details about the other party's private key where static Diffie-Hellman is in use. As of this release the key parameters are checked on agreement calculation. Affected Software/OS: bouncycastle on Debian Linux Solution: For Debian 8 'Jessie', these problems have been fixed in version 1.49+dfsg-3+deb8u3. We recommend that you upgrade your bouncycastle packages. CVSS Score: 5.0 CVSS Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N
Referencia Cruzada:	Common Vulnerability Exposure (CVE) ID: CVE-2016-1000338 Common Vulnerability Exposure (CVE) ID: CVE-2016-1000339 Common Vulnerability Exposure (CVE) ID: CVE-2016-1000341 Common Vulnerability Exposure (CVE) ID: CVE-2016-1000342 Common Vulnerability Exposure (CVE) ID: CVE-2016-1000343 Common Vulnerability Exposure (CVE) ID: CVE-2016-1000345 Common Vulnerability Exposure (CVE) ID: CVE-2016-1000346
Copyright	Copyright (C) 2018 Greenbone Networks GmbH http://greenbone.net

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