Amazon Linux AMI : nss / nss-softokn,nss-util,nspr (ALAS-2020-1355)

Medium Nessus Plugin ID 134681

Synopsis

The remote Amazon Linux AMI host is missing a security update.

Description

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)

Solution

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.

See Also

https://alas.aws.amazon.com/ALAS-2020-1355.html

Plugin Details

Severity: Medium

ID: 134681

File Name: ala_ALAS-2020-1355.nasl

Version: 1.2

Type: local

Agent: unix

Published: 2020/03/19

Updated: 2020/03/23

Dependencies: 12634

Risk Information

Risk Factor: Medium

CVSS v2.0

Base Score: 6.8

Temporal Score: 5

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSS v3.0

Base Score: 8.8

Temporal Score: 7.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:nspr, p-cpe:/a:amazon:linux:nspr-debuginfo, p-cpe:/a:amazon:linux:nspr-devel, p-cpe:/a:amazon:linux:nss, p-cpe:/a:amazon:linux:nss-debuginfo, p-cpe:/a:amazon:linux:nss-devel, p-cpe:/a:amazon:linux:nss-pkcs11-devel, p-cpe:/a:amazon:linux:nss-softokn, p-cpe:/a:amazon:linux:nss-softokn-debuginfo, p-cpe:/a:amazon:linux:nss-softokn-devel, p-cpe:/a:amazon:linux:nss-softokn-freebl, p-cpe:/a:amazon:linux:nss-softokn-freebl-devel, p-cpe:/a:amazon:linux:nss-sysinit, p-cpe:/a:amazon:linux:nss-tools, p-cpe:/a:amazon:linux:nss-util, p-cpe:/a:amazon:linux:nss-util-debuginfo, p-cpe:/a:amazon:linux:nss-util-devel, cpe:/o:amazon:linux

Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 2020/03/18

Vulnerability Publication Date: 2018/06/13

Reference Information

CVE: CVE-2018-0495, CVE-2018-12404, CVE-2019-11729, CVE-2019-11745

ALAS: 2020-1355