==========================================================================
Ubuntu Security Notice USN-3692-1
June 26, 2018
openssl, openssl1.0 vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 18.04 LTS
– Ubuntu 17.10
– 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:
Keegan Ryan discovered that OpenSSL incorrectly handled ECDSA key
generation. An attacker could possibly use this issue to perform a
cache-timing attack and recover private ECDSA keys. (CVE-2018-0495)
Guido Vranken discovered that OpenSSL incorrectly handled very large prime
values during a key agreement. A remote attacker could possibly use this
issue to consume resources, leading to a denial of service. (CVE-2018-0732)
Alejandro Cabrera Aldaya, Billy Brumley, Cesar Pereida Garcia and Luis
Manuel Alvarez Tapia discovered that OpenSSL incorrectly handled RSA key
generation. An attacker could possibly use this issue to perform a
cache-timing attack and recover private RSA keys. (CVE-2018-0737)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 18.04 LTS:
libssl1.0.0 1.0.2n-1ubuntu5.1
libssl1.1 1.1.0g-2ubuntu4.1
Ubuntu 17.10:
libssl1.0.0 1.0.2g-1ubuntu13.6
Ubuntu 16.04 LTS:
libssl1.0.0 1.0.2g-1ubuntu4.13
Ubuntu 14.04 LTS:
libssl1.0.0 1.0.1f-1ubuntu2.26
After a standard system update you need to reboot your computer to make
all the necessary changes.
References:
https://usn.ubuntu.com/usn/usn-3692-1
CVE-2018-0495, CVE-2018-0732, CVE-2018-0737
Package Information:
https://launchpad.net/ubuntu/+source/openssl/1.1.0g-2ubuntu4.1
https://launchpad.net/ubuntu/+source/openssl1.0/1.0.2n-1ubuntu5.1
https://launchpad.net/ubuntu/+source/openssl/1.0.2g-1ubuntu13.6
https://launchpad.net/ubuntu/+source/openssl/1.0.2g-1ubuntu4.13
https://launchpad.net/ubuntu/+source/openssl/1.0.1f-1ubuntu2.26
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—
==========================================================================
Ubuntu Security Notice USN-3692-2
June 26, 2018
openssl vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 12.04 ESM
Summary:
Several security issues were fixed in OpenSSL.
Software Description:
– openssl: Secure Socket Layer (SSL) cryptographic library and tools
Details:
USN-3692-1 fixed a vulnerability in OpenSSL. This update provides
the corresponding update for Ubuntu 12.04 ESM.
Original advisory details:
Keegan Ryan discovered that OpenSSL incorrectly handled ECDSA key
generation. An attacker could possibly use this issue to perform a
cache-timing attack and recover private ECDSA keys. (CVE-2018-0495)
Guido Vranken discovered that OpenSSL incorrectly handled very large
prime values during a key agreement. A remote attacker could possibly
use this issue to consume resources, leading to a denial of service.
(CVE-2018-0732)
Alejandro Cabrera Aldaya, Billy Brumley, Cesar Pereida Garcia and Luis
Manuel Alvarez Tapia discovered that OpenSSL incorrectly handled RSA
key generation. An attacker could possibly use this issue to perform a
cache-timing attack and recover private RSA keys. (CVE-2018-0737)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 12.04 ESM:
libssl1.0.0 1.0.1-4ubuntu5.43
After a standard system update you need to reboot your computer to make
all the necessary changes.
References:
https://usn.ubuntu.com/usn/usn-3692-2
https://usn.ubuntu.com/usn/usn-3692-1
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