Amazon Linux 2 : curl (ALAS-2018-995)

critical Nessus Plugin ID 109178
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Synopsis

The remote Amazon Linux 2 host is missing a security update.

Description

FTP path trickery leads to NIL byte out of bounds write :

It was found that libcurl did not safely parse FTP URLs when using the CURLOPT_FTP_FILEMETHOD method. An attacker, able to provide a specially crafted FTP URL to an application using libcurl, could write a NULL byte at an arbitrary location, resulting in a crash, or an unspecified behavior. (CVE-2018-1000120)

LDAP NULL pointer dereference :

A NULL pointer dereference flaw was found in the way libcurl checks values returned by the openldap ldap_get_attribute_ber() function. A malicious LDAP server could use this flaw to crash a libcurl client application via a specially crafted LDAP reply. (CVE-2018-1000121)

RTSP RTP buffer over-read :

A buffer over-read exists in curl 7.20.0 to and including curl 7.58.0 in the RTSP+RTP handling code that allows an attacker to cause a denial of service or information leakage. (CVE-2018-1000122)

Solution

Run 'yum update curl' to update your system.

See Also

https://alas.aws.amazon.com/AL2/ALAS-2018-995.html

Plugin Details

Severity: Critical

ID: 109178

File Name: al2_ALAS-2018-995.nasl

Version: 1.2

Type: local

Agent: unix

Published: 4/20/2018

Updated: 8/31/2018

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Medium

Score: 6

CVSS v2

Risk Factor: High

Base Score: 7.5

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

CVSS v3

Risk Factor: Critical

Base Score: 9.8

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:curl, p-cpe:/a:amazon:linux:curl-debuginfo, p-cpe:/a:amazon:linux:libcurl, p-cpe:/a:amazon:linux:libcurl-devel, cpe:/o:amazon:linux:2

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

Patch Publication Date: 4/19/2018

Reference Information

CVE: CVE-2018-1000120, CVE-2018-1000121, CVE-2018-1000122

ALAS: 2018-995