==========================================================================
Ubuntu Security Notice USN-3689-1
June 19, 2018
libgcrypt11, libgcrypt20 vulnerability
==========================================================================
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:
Libgcrypt could be made to expose sensitive information.
Software Description:
– libgcrypt20: LGPL Crypto library
– libgcrypt11: LGPL Crypto library
Details:
Keegan Ryan discovered that Libgcrypt was susceptible to a side-channel
attack. A local attacker could possibly use this attack to recover ECDSA
private keys.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 18.04 LTS:
libgcrypt20 1.8.1-4ubuntu1.1
Ubuntu 17.10:
libgcrypt20 1.7.8-2ubuntu1.1
Ubuntu 16.04 LTS:
libgcrypt20 1.6.5-2ubuntu0.5
Ubuntu 14.04 LTS:
libgcrypt11 1.5.3-2ubuntu4.6
In general, a standard system update will make all the necessary changes.
References:
https://usn.ubuntu.com/usn/usn-3689-1
CVE-2018-0495
Package Information:
https://launchpad.net/ubuntu/+source/libgcrypt20/1.8.1-4ubuntu1.1
https://launchpad.net/ubuntu/+source/libgcrypt20/1.7.8-2ubuntu1.1
https://launchpad.net/ubuntu/+source/libgcrypt20/1.6.5-2ubuntu0.5
https://launchpad.net/ubuntu/+source/libgcrypt11/1.5.3-2ubuntu4.6
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==========================================================================
Ubuntu Security Notice USN-3689-2
June 19, 2018
libgcrypt11 vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 12.04 ESM
Summary:
Libgcrypt could be made to expose sensitive information.
Software Description:
– libgcrypt11: LGPL Crypto library
Details:
USN-3689-1 fixed a vulnerability in Libgcrypt. This update provides
the corresponding update for Ubuntu 12.04 ESM.
Original advisory details:
Keegan Ryan discovered that Libgcrypt was susceptible to a side-
channel attack. A local attacker could possibly use this attack to
recover ECDSA private keys.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 12.04 ESM:
libgcrypt11 1.5.0-3ubuntu0.8
In general, a standard system update will make all the necessary
changes.
References:
https://usn.ubuntu.com/usn/usn-3689-2
https://usn.ubuntu.com/usn/usn-3689-1
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