Amazon Linux 2 Security Advisory: ALAS-2018-1120
Advisory Release Date: 2018-12-06 20:25 Pacific
Advisory Updated Date: 2018-12-08 01:50 Pacific
It was found that GnuTLS's implementation of HMAC-SHA-256 was vulnerable to Lucky Thirteen-style attack. A remote attacker could use this flaw to conduct distinguishing attacks and plain text recovery attacks via statistical analysis of timing data using crafted packets.(CVE-2018-10844 )
It was found that GnuTLS's implementation of HMAC-SHA-384 was vulnerable to a Lucky Thirteen-style attack. A remote attacker could use this flaw to conduct distinguishing attacks and plain text recovery attacks via statistical analysis of timing data using crafted packets.(CVE-2018-10845 )
A cache-based side channel attack was found in the way GnuTLS implements CBC-mode cipher suites. An attacker could use a combination of "Just in Time" Prime+probe and Lucky-13 attacks to recover plain text in a cross-VM attack scenario.(CVE-2018-10846 )
Run yum update gnutls to update your system.