Amazon Linux AMI : openssl (ALAS-2018-1102)

Medium Nessus Plugin ID 119464

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VPR Score: 4.4

Synopsis

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

Description

Libgcrypt 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)

While parsing an IPAddressFamily extension in an X.509 certificate, it is possible to do a one-byte overread. This would result in an incorrect text display of the certificate. This bug has been present since 2006.(CVE-2017-3735)

Constructed ASN.1 types with a recursive definition (such as can be found in PKCS7) could eventually exceed the stack given malicious input with excessive recursion. This could result in a Denial Of Service attack. There are no such structures used within SSL/TLS that come from untrusted sources so this is considered safe.(CVE-2018-0739)

Solution

Run 'yum update openssl' to update your system.

See Also

https://alas.aws.amazon.com/ALAS-2018-1102.html

Plugin Details

Severity: Medium

ID: 119464

File Name: ala_ALAS-2018-1102.nasl

Version: 1.2

Type: local

Agent: unix

Published: 2018/12/07

Updated: 2020/06/09

Dependencies: 12634

Risk Information

Risk Factor: Medium

VPR Score: 4.4

CVSS Score Source: CVE-2017-3735

CVSS v2.0

Base Score: 5

Temporal Score: 3.7

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

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

CVSS v3.0

Base Score: 5.3

Temporal Score: 4.6

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

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:openssl, p-cpe:/a:amazon:linux:openssl-debuginfo, p-cpe:/a:amazon:linux:openssl-devel, p-cpe:/a:amazon:linux:openssl-perl, p-cpe:/a:amazon:linux:openssl-static, 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: 2018/12/07

Vulnerability Publication Date: 2017/08/28

Reference Information

CVE: CVE-2017-3735, CVE-2018-0495, CVE-2018-0739

ALAS: 2018-1102