Medium: nss

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  

Additional References

Red Hat: CVE-2020-25648

Mitre: CVE-2020-25648