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USN-3689-1: Libgcrypt vulnerability

19 June 2018

Libgcrypt could be made to expose sensitive information.




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
Ubuntu 17.10
Ubuntu 16.04
Ubuntu 14.04

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


Related notices

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