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Sicherheit: Mehrere Probleme in OpenSSL (Aktualisierung)
Aktuelle Meldungen Distributionen
Name: Mehrere Probleme in OpenSSL (Aktualisierung)
ID: USN-3087-2
Distribution: Ubuntu
Plattformen: Ubuntu 12.04 LTS, Ubuntu 14.04 LTS, Ubuntu 16.04 LTS
Datum: Fr, 23. September 2016, 19:19
Referenzen: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2179
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-6306
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2178
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2180
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2183
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2177
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2182
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-6303
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2181
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-6304
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-6302
Update von: Mehrere Probleme in OpenSSL

Originalnachricht

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From: Marc Deslauriers <marc.deslauriers@canonical.com>
Reply-To: Ubuntu Security <security@ubuntu.com>
To: "ubuntu-security-announce@lists.ubuntu.com"
<ubuntu-security-announce@lists.ubuntu.com>
Message-ID: <a73bc593-fd5c-17bf-d82d-e446dd4f00ac@canonical.com>
Subject: [USN-3087-2] OpenSSL regression

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==========================================================================
Ubuntu Security Notice USN-3087-2
September 23, 2016

openssl regression
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS

Summary:

USN-3087-1 introduced a regression in OpenSSL.

Software Description:
- openssl: Secure Socket Layer (SSL) cryptographic library and tools

Details:

USN-3087-1 fixed vulnerabilities in OpenSSL. The fix for CVE-2016-2182 was
incomplete and caused a regression when parsing certificates. This update
fixes the problem.

We apologize for the inconvenience.

Original advisory details:

Shi Lei discovered that OpenSSL incorrectly handled the OCSP Status Request
extension. A remote attacker could possibly use this issue to cause memory
consumption, resulting in a denial of service. (CVE-2016-6304)
Guido Vranken discovered that OpenSSL used undefined behaviour when
performing pointer arithmetic. A remote attacker could possibly use this
issue to cause OpenSSL to crash, resulting in a denial of service. This
issue has only been addressed in Ubuntu 16.04 LTS in this update.
(CVE-2016-2177)
César Pereida, Billy Brumley, and Yuval Yarom discovered that OpenSSL
did not properly use constant-time operations when performing DSA signing.
A remote attacker could possibly use this issue to perform a cache-timing
attack and recover private DSA keys. (CVE-2016-2178)
Quan Luo discovered that OpenSSL did not properly restrict the lifetime
of queue entries in the DTLS implementation. A remote attacker could
possibly use this issue to consume memory, resulting in a denial of
service. (CVE-2016-2179)
Shi Lei discovered that OpenSSL incorrectly handled memory in the
TS_OBJ_print_bio() function. A remote attacker could possibly use this
issue to cause a denial of service. (CVE-2016-2180)
It was discovered that the OpenSSL incorrectly handled the DTLS anti-replay
feature. A remote attacker could possibly use this issue to cause a denial
of service. (CVE-2016-2181)
Shi Lei discovered that OpenSSL incorrectly validated division results. A
remote attacker could possibly use this issue to cause a denial of service.
(CVE-2016-2182)
Karthik Bhargavan and Gaetan Leurent discovered that the DES and Triple DES
ciphers were vulnerable to birthday attacks. A remote attacker could
possibly use this flaw to obtain clear text data from long encrypted
sessions. This update moves DES from the HIGH cipher list to MEDIUM.
(CVE-2016-2183)
Shi Lei discovered that OpenSSL incorrectly handled certain ticket lengths.
A remote attacker could use this issue to cause a denial of service.
(CVE-2016-6302)
Shi Lei discovered that OpenSSL incorrectly handled memory in the
MDC2_Update() function. A remote attacker could possibly use this issue to
cause a denial of service. (CVE-2016-6303)
Shi Lei discovered that OpenSSL incorrectly performed certain message
length checks. A remote attacker could possibly use this issue to cause a
denial of service. (CVE-2016-6306)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 16.04 LTS:
libssl1.0.0 1.0.2g-1ubuntu4.5

Ubuntu 14.04 LTS:
libssl1.0.0 1.0.1f-1ubuntu2.21

Ubuntu 12.04 LTS:
libssl1.0.0 1.0.1-4ubuntu5.38

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
http://www.ubuntu.com/usn/usn-3087-2
http://www.ubuntu.com/usn/usn-3087-1
https://launchpad.net/bugs/1626883

Package Information:
https://launchpad.net/ubuntu/+source/openssl/1.0.2g-1ubuntu4.5
https://launchpad.net/ubuntu/+source/openssl/1.0.1f-1ubuntu2.21
https://launchpad.net/ubuntu/+source/openssl/1.0.1-4ubuntu5.38



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