FreeBSD : ruby -- multiple vulnerabilities (95b01379-9d52-11e7-a25c-471bafc3262f)

critical Nessus Plugin ID 103345

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Synopsis

The remote FreeBSD host is missing one or more security-related updates.

Description

Ruby blog :

CVE-2017-0898: Buffer underrun vulnerability in Kernel.sprintf

If a malicious format string which contains a precious specifier (*) is passed and a huge minus value is also passed to the specifier, buffer underrun may be caused. In such situation, the result may contains heap, or the Ruby interpreter may crash.

CVE-2017-10784: Escape sequence injection vulnerability in the Basic authentication of WEBrick

When using the Basic authentication of WEBrick, clients can pass an arbitrary string as the user name. WEBrick outputs the passed user name intact to its log, then an attacker can inject malicious escape sequences to the log and dangerous control characters may be executed on a victim's terminal emulator.

This vulnerability is similar to a vulnerability already fixed, but it had not been fixed in the Basic authentication.

CVE-2017-14033: Buffer underrun vulnerability in OpenSSL ASN1 decode

If a malicious string is passed to the decode method of OpenSSL::ASN1, buffer underrun may be caused and the Ruby interpreter may crash.

CVE-2017-14064: Heap exposure vulnerability in generating JSON

The generate method of JSON module optionally accepts an instance of JSON::Ext::Generator::State class. If a malicious instance is passed, the result may include contents of heap.

Solution

Update the affected packages.

Plugin Details

Severity: Critical

ID: 103345

File Name: freebsd_pkg_95b013799d5211e7a25c471bafc3262f.nasl

Version: 3.6

Type: local

Family: FreeBSD Local Security Checks

Published: 9/20/2017

Updated: 11/20/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 9.3

Temporal Score: 7.3

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

CVSS Score Source: CVE-2017-10784

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

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

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

CVSS Score Source: CVE-2017-14064

Vulnerability Information

CPE: cpe:/o:freebsd:freebsd, p-cpe:/a:freebsd:freebsd:ruby

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 9/19/2017

Vulnerability Publication Date: 9/14/2017

Reference Information

CVE: CVE-2017-0898, CVE-2017-10784, CVE-2017-14033, CVE-2017-14064

Detections

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