Medium: nss

Issue Overview:

A cached side channel attack during handshakes using RSA encryption could allow for the decryption of encrypted content. This is a variant of the Adaptive Chosen Ciphertext attack (AKA Bleichenbacher attack) and affects all NSS versions prior to NSS 3.41. (CVE-2018-12404)

Libgcrypt before 1.7.10 and 1.8.x before 1.8.3 allows a memory-cache side-channel attack on ECDSA signatures that can be mitigated through the use of blinding during the signing process in the _gcry_ecc_ecdsa_sign function in cipher/ecc-ecdsa.c, aka the Return Of the Hidden Number Problem or ROHNP. To discover an ECDSA key, the attacker needs access to either the local machine or a different virtual machine on the same physical host. (CVE-2018-0495)

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-3.44.0-4.amzn2.0.2.aarch64  
    nss-tools-3.44.0-4.amzn2.0.2.aarch64  
    nss-sysinit-3.44.0-4.amzn2.0.2.aarch64  
    nss-devel-3.44.0-4.amzn2.0.2.aarch64  
    nss-pkcs11-devel-3.44.0-4.amzn2.0.2.aarch64  
    nss-debuginfo-3.44.0-4.amzn2.0.2.aarch64  
  
i686:  
    nss-3.44.0-4.amzn2.0.2.i686  
    nss-tools-3.44.0-4.amzn2.0.2.i686  
    nss-sysinit-3.44.0-4.amzn2.0.2.i686  
    nss-devel-3.44.0-4.amzn2.0.2.i686  
    nss-pkcs11-devel-3.44.0-4.amzn2.0.2.i686  
    nss-debuginfo-3.44.0-4.amzn2.0.2.i686  
  
src:  
    nss-3.44.0-4.amzn2.0.2.src  
  
x86_64:  
    nss-3.44.0-4.amzn2.0.2.x86_64  
    nss-tools-3.44.0-4.amzn2.0.2.x86_64  
    nss-sysinit-3.44.0-4.amzn2.0.2.x86_64  
    nss-devel-3.44.0-4.amzn2.0.2.x86_64  
    nss-pkcs11-devel-3.44.0-4.amzn2.0.2.x86_64  
    nss-debuginfo-3.44.0-4.amzn2.0.2.x86_64  

Additional References

Red Hat: CVE-2018-0495, CVE-2018-12404

Mitre: CVE-2018-0495, CVE-2018-12404