Ubuntu 14.04 LTS / 16.04 LTS / 17.10 / 18.04 LTS : libgcrypt11, libgcrypt20 vulnerability (USN-3689-1)

High Nessus Plugin ID 110623


The remote Ubuntu host is missing one or more security-related patches.


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.

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.


Update the affected libgcrypt11 and / or libgcrypt20 packages.

Plugin Details

Severity: High

ID: 110623

File Name: ubuntu_USN-3689-1.nasl

Version: 1.2

Type: local

Agent: unix

Published: 2018/06/20

Modified: 2018/06/28

Dependencies: 12634

Risk Information

Risk Factor: High

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:libgcrypt11, p-cpe:/a:canonical:ubuntu_linux:libgcrypt20, cpe:/o:canonical:ubuntu_linux:14.04, cpe:/o:canonical:ubuntu_linux:16.04, cpe:/o:canonical:ubuntu_linux:17.10, cpe:/o:canonical:ubuntu_linux:18.04:-:lts

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Patch Publication Date: 2018/06/19

Reference Information

CVE: CVE-2018-0495

USN: 3689-1

IAVA: 2018-A-0203