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Sicherheit: Mehrere Probleme in OpenSSL
Aktuelle Meldungen Distributionen
Name: Mehrere Probleme in OpenSSL
ID: USN-3840-1
Distribution: Ubuntu
Plattformen: Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 18.10
Datum: Do, 6. Dezember 2018, 23:28
Referenzen: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-0735
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-0734
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-5407
Applikationen: OpenSSL

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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
Message-ID: <94259e8f-648e-4cba-5040-bbaef9c406fe@canonical.com>
Subject: [USN-3840-1] OpenSSL vulnerabilities

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==========================================================================
Ubuntu Security Notice USN-3840-1
December 06, 2018

openssl, openssl1.0 vulnerabilities
==========================================================================

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

- Ubuntu 18.10
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in OpenSSL.

Software Description:
- openssl: Secure Socket Layer (SSL) cryptographic library and tools
- openssl1.0: Secure Socket Layer (SSL) cryptographic library and tools

Details:

Samuel Weiser discovered that OpenSSL incorrectly handled DSA signing. An
attacker could possibly use this issue to perform a timing side-channel
attack and recover private DSA keys. (CVE-2018-0734)

Samuel Weiser discovered that OpenSSL incorrectly handled ECDSA signing. An
attacker could possibly use this issue to perform a timing side-channel
attack and recover private ECDSA keys. This issue only affected Ubuntu
18.04 LTS and Ubuntu 18.10. (CVE-2018-0735)

Billy Bob Brumley, Cesar Pereida Garcia, Sohaib ul Hassan, Nicola Tuveri,
and Alejandro Cabrera Aldaya discovered that Simultaneous Multithreading
(SMT) architectures are vulnerable to side-channel leakage. This issue is
known as "PortSmash". An attacker could possibly use this issue to
perform
a timing side-channel attack and recover private keys. (CVE-2018-5407)

Update instructions:

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

Ubuntu 18.10:
libssl1.0.0 1.0.2n-1ubuntu6.1
libssl1.1 1.1.1-1ubuntu2.1

Ubuntu 18.04 LTS:
libssl1.0.0 1.0.2n-1ubuntu5.2
libssl1.1 1.1.0g-2ubuntu4.3

Ubuntu 16.04 LTS:
libssl1.0.0 1.0.2g-1ubuntu4.14

Ubuntu 14.04 LTS:
libssl1.0.0 1.0.1f-1ubuntu2.27

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

References:
https://usn.ubuntu.com/usn/usn-3840-1
CVE-2018-0734, CVE-2018-0735, CVE-2018-5407

Package Information:
https://launchpad.net/ubuntu/+source/openssl/1.1.1-1ubuntu2.1
https://launchpad.net/ubuntu/+source/openssl1.0/1.0.2n-1ubuntu6.1
https://launchpad.net/ubuntu/+source/openssl/1.1.0g-2ubuntu4.3
https://launchpad.net/ubuntu/+source/openssl1.0/1.0.2n-1ubuntu5.2
https://launchpad.net/ubuntu/+source/openssl/1.0.2g-1ubuntu4.14
https://launchpad.net/ubuntu/+source/openssl/1.0.1f-1ubuntu2.27


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