USN-3689-1: Libgcrypt vulnerability

Releases

• Ubuntu 18.04 ESM
• Ubuntu 17.10
• Ubuntu 16.04 ESM
• Ubuntu 14.04 ESM

Packages

• libgcrypt11 - LGPL Crypto library
• libgcrypt20 - 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

• libgcrypt20 - 1.8.1-4ubuntu1.1

Ubuntu 17.10

• libgcrypt20 - 1.7.8-2ubuntu1.1

Ubuntu 16.04

• libgcrypt20 - 1.6.5-2ubuntu0.5

Ubuntu 14.04

• libgcrypt11 - 1.5.3-2ubuntu4.6

In general, a standard system update will make all the necessary changes.

References

• CVE-2018-0495

Related notices

• USN-3692-1: libssl-dev, libssl1.0.0-udeb, libssl-doc, openssl, libcrypto1.0.0-udeb, openssl1.0, libssl1.1, libssl1.0-dev, libssl1.1-udeb, libssl1.0.0, libcrypto1.1-udeb
• USN-3692-2: openssl, libssl1.0.0
• USN-3689-2: libgcrypt11
• USN-3850-1: libnss3-nssdb, libnss3-dev, nss, libnss3-tools, libnss3-1d, libnss3
• USN-3850-2: nss, libnss3