https://usn.ubuntu.com/4236-2/

USN-4236-2: Libgcrypt vulnerability

libgcrypt20 vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
Ubuntu 16.04 LTS
Summary
Libgcrypt could be made to expose sensitive information.
Software Description
libgcrypt20 - LGPL Crypto library
Details
USN-4236-1 fixed a vulnerability in Libgcrypt. This update provides the corresponding fix for Ubuntu 16.04 LTS.
Original advisory details:
It was discovered that Libgcrypt was susceptible to a ECDSA timing attack. An attacker could possibly use this attack to recover sensitive information.
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 16.04 LTS
libgcrypt20 - 1.6.5-2ubuntu0.6
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.
References
USN-4236-1
CVE-2019-13627
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CVE-2019-13627

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