ALAS-2020-1355


Amazon Linux AMI Security Advisory: ALAS-2020-1355
Advisory Release Date: 2020-03-16 21:29 Pacific
Advisory Updated Date: 2020-03-18 22:10 Pacific
Severity: Important

Issue Overview:

A heap-based buffer overflow was found in the NSC_EncryptUpdate() function in Mozilla nss. A remote attacker could trigger this flaw via SRTP encrypt or decrypt operations, to execute arbitrary code with the permissions of the user running the application (compiled with nss). While the attack complexity is high, the impact to confidentiality, integrity, and availability are high as well. (CVE-2019-11745 )

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 )

Empty or malformed p256-ECDH public keys may trigger a segmentation fault due values being improperly sanitized before being copied into memory and used. This vulnerability affects Firefox ESR < 60.8, Firefox < 68, and Thunderbird < 60.8. (CVE-2019-11729 )

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, nss-softokn, nss-util, nspr


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

New Packages:
i686:
    nspr-debuginfo-4.21.0-1.43.amzn1.i686
    nspr-4.21.0-1.43.amzn1.i686
    nspr-devel-4.21.0-1.43.amzn1.i686
    nss-util-devel-3.44.0-4.56.amzn1.i686
    nss-util-3.44.0-4.56.amzn1.i686
    nss-util-debuginfo-3.44.0-4.56.amzn1.i686
    nss-softokn-freebl-devel-3.44.0-8.44.amzn1.i686
    nss-softokn-freebl-3.44.0-8.44.amzn1.i686
    nss-softokn-devel-3.44.0-8.44.amzn1.i686
    nss-softokn-debuginfo-3.44.0-8.44.amzn1.i686
    nss-softokn-3.44.0-8.44.amzn1.i686
    nss-debuginfo-3.44.0-7.84.amzn1.i686
    nss-pkcs11-devel-3.44.0-7.84.amzn1.i686
    nss-3.44.0-7.84.amzn1.i686
    nss-tools-3.44.0-7.84.amzn1.i686
    nss-sysinit-3.44.0-7.84.amzn1.i686
    nss-devel-3.44.0-7.84.amzn1.i686

src:
    nspr-4.21.0-1.43.amzn1.src
    nss-util-3.44.0-4.56.amzn1.src
    nss-softokn-3.44.0-8.44.amzn1.src
    nss-3.44.0-7.84.amzn1.src

x86_64:
    nspr-devel-4.21.0-1.43.amzn1.x86_64
    nspr-debuginfo-4.21.0-1.43.amzn1.x86_64
    nspr-4.21.0-1.43.amzn1.x86_64
    nss-util-devel-3.44.0-4.56.amzn1.x86_64
    nss-util-3.44.0-4.56.amzn1.x86_64
    nss-util-debuginfo-3.44.0-4.56.amzn1.x86_64
    nss-softokn-freebl-devel-3.44.0-8.44.amzn1.x86_64
    nss-softokn-3.44.0-8.44.amzn1.x86_64
    nss-softokn-debuginfo-3.44.0-8.44.amzn1.x86_64
    nss-softokn-devel-3.44.0-8.44.amzn1.x86_64
    nss-softokn-freebl-3.44.0-8.44.amzn1.x86_64
    nss-tools-3.44.0-7.84.amzn1.x86_64
    nss-3.44.0-7.84.amzn1.x86_64
    nss-pkcs11-devel-3.44.0-7.84.amzn1.x86_64
    nss-sysinit-3.44.0-7.84.amzn1.x86_64
    nss-devel-3.44.0-7.84.amzn1.x86_64
    nss-debuginfo-3.44.0-7.84.amzn1.x86_64