==========================================================================
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
—–BEGIN PGP SIGNATURE—–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=pnQI
—–END PGP SIGNATURE—–
—
