Amazon Linux 2 Security Advisory: ALAS-2021-1664
Advisory Release Date: 2021-06-16 20:37 Pacific
Advisory Updated Date: 2021-06-22 22:38 Pacific
Severity:
Medium
Issue Overview:
A flaw was found in the way NSS handled CCS (ChangeCipherSpec) messages in TLS 1.3. This flaw allows a remote attacker to send multiple CCS messages, causing a denial of service for servers compiled with the NSS library. The highest threat from this vulnerability is to system availability. (CVE-2020-25648)
Affected Packages:
nss
Note:
This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update nss to update your system.
New Packages:
aarch64:
nss-3.53.1-7.amzn2.aarch64
nss-tools-3.53.1-7.amzn2.aarch64
nss-sysinit-3.53.1-7.amzn2.aarch64
nss-devel-3.53.1-7.amzn2.aarch64
nss-pkcs11-devel-3.53.1-7.amzn2.aarch64
nss-debuginfo-3.53.1-7.amzn2.aarch64
i686:
nss-3.53.1-7.amzn2.i686
nss-tools-3.53.1-7.amzn2.i686
nss-sysinit-3.53.1-7.amzn2.i686
nss-devel-3.53.1-7.amzn2.i686
nss-pkcs11-devel-3.53.1-7.amzn2.i686
nss-debuginfo-3.53.1-7.amzn2.i686
src:
nss-3.53.1-7.amzn2.src
x86_64:
nss-3.53.1-7.amzn2.x86_64
nss-tools-3.53.1-7.amzn2.x86_64
nss-sysinit-3.53.1-7.amzn2.x86_64
nss-devel-3.53.1-7.amzn2.x86_64
nss-pkcs11-devel-3.53.1-7.amzn2.x86_64
nss-debuginfo-3.53.1-7.amzn2.x86_64