Medium: nss-util, nss, nss-softokn

Issue Overview:

CVE-2016-2834 nss: Multiple security flaws (MFSA 2016-61)
Multiple buffer handling flaws were found in the way NSS handled cryptographic data from the network. A remote attacker could use these flaws to crash an application using NSS or, possibly, execute arbitrary code with the permission of the user running the application.

CVE-2016-8635 nss: small-subgroups attack flaw
It was found that Diffie Hellman Client key exchange handling in NSS was vulnerable to small subgroup confinement attack. An attacker could use this flaw to recover private keys by confining the client DH key to small subgroup of the desired group.

CVE-2016-5285 nss: Missing NULL check in PK11_SignWithSymKey / ssl3_ComputeRecordMACConstantTime causes server crash
A NULL pointer dereference flaw was found in the way NSS handled invalid Diffie-Hellman keys. A remote client could use this flaw to crash a TLS/SSL server using NSS.

Affected Packages:

nss-util, nss, nss-softokn

Issue Correction:
Run yum update nss-util to update your system.
Run yum update nss to update your system.
Run yum update nss-softokn to update your system.

New Packages:

i686:  
    nss-util-3.21.3-1.1.51.amzn1.i686  
    nss-util-debuginfo-3.21.3-1.1.51.amzn1.i686  
    nss-util-devel-3.21.3-1.1.51.amzn1.i686  
    nss-debuginfo-3.21.3-2.77.amzn1.i686  
    nss-tools-3.21.3-2.77.amzn1.i686  
    nss-devel-3.21.3-2.77.amzn1.i686  
    nss-sysinit-3.21.3-2.77.amzn1.i686  
    nss-pkcs11-devel-3.21.3-2.77.amzn1.i686  
    nss-3.21.3-2.77.amzn1.i686  
    nss-softokn-3.16.2.3-14.4.39.amzn1.i686  
    nss-softokn-freebl-3.16.2.3-14.4.39.amzn1.i686  
    nss-softokn-debuginfo-3.16.2.3-14.4.39.amzn1.i686  
    nss-softokn-freebl-devel-3.16.2.3-14.4.39.amzn1.i686  
    nss-softokn-devel-3.16.2.3-14.4.39.amzn1.i686  
  
src:  
    nss-util-3.21.3-1.1.51.amzn1.src  
    nss-3.21.3-2.77.amzn1.src  
    nss-softokn-3.16.2.3-14.4.39.amzn1.src  
  
x86_64:  
    nss-util-3.21.3-1.1.51.amzn1.x86_64  
    nss-util-devel-3.21.3-1.1.51.amzn1.x86_64  
    nss-util-debuginfo-3.21.3-1.1.51.amzn1.x86_64  
    nss-sysinit-3.21.3-2.77.amzn1.x86_64  
    nss-pkcs11-devel-3.21.3-2.77.amzn1.x86_64  
    nss-tools-3.21.3-2.77.amzn1.x86_64  
    nss-3.21.3-2.77.amzn1.x86_64  
    nss-devel-3.21.3-2.77.amzn1.x86_64  
    nss-debuginfo-3.21.3-2.77.amzn1.x86_64  
    nss-softokn-devel-3.16.2.3-14.4.39.amzn1.x86_64  
    nss-softokn-freebl-3.16.2.3-14.4.39.amzn1.x86_64  
    nss-softokn-debuginfo-3.16.2.3-14.4.39.amzn1.x86_64  
    nss-softokn-freebl-devel-3.16.2.3-14.4.39.amzn1.x86_64  
    nss-softokn-3.16.2.3-14.4.39.amzn1.x86_64  

Additional References

Red Hat: CVE-2016-2834, CVE-2016-5285, CVE-2016-8635

Mitre: CVE-2016-2834, CVE-2016-5285, CVE-2016-8635