USN-6499-1 fixed vulnerabilities in GnuTLS. This update provides the corresponding update for Ubuntu 18.04 LTS.
Original advisory details:
It was discovered that GnuTLS had a timing side-channel when handling certain RSA-PSK key exchanges. A remote attacker could possibly use this issue to recover sensitive information.
{ "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro", "binaries": [ { "binary_version": "3.5.18-1ubuntu1.6+esm1", "binary_name": "gnutls-bin" }, { "binary_version": "3.5.18-1ubuntu1.6+esm1", "binary_name": "gnutls-bin-dbgsym" }, { "binary_version": "3.5.18-1ubuntu1.6+esm1", "binary_name": "gnutls-doc" }, { "binary_version": "3.5.18-1ubuntu1.6+esm1", "binary_name": "libgnutls-dane0" }, { "binary_version": "3.5.18-1ubuntu1.6+esm1", "binary_name": "libgnutls-dane0-dbgsym" }, { "binary_version": "3.5.18-1ubuntu1.6+esm1", "binary_name": "libgnutls-openssl27" }, { "binary_version": "3.5.18-1ubuntu1.6+esm1", "binary_name": "libgnutls-openssl27-dbgsym" }, { "binary_version": "3.5.18-1ubuntu1.6+esm1", "binary_name": "libgnutls28-dev" }, { "binary_version": "3.5.18-1ubuntu1.6+esm1", "binary_name": "libgnutls30" }, { "binary_version": "3.5.18-1ubuntu1.6+esm1", "binary_name": "libgnutls30-dbgsym" }, { "binary_version": "3.5.18-1ubuntu1.6+esm1", "binary_name": "libgnutlsxx28" }, { "binary_version": "3.5.18-1ubuntu1.6+esm1", "binary_name": "libgnutlsxx28-dbgsym" } ] }