CVE-2017-17790

ruby: Command injection in lib/resolv.rb:lazy_initialize() allows arbitrary code execution

Severity Score

9.8

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The lazy_initialize function in lib/resolv.rb in Ruby through 2.4.3 uses Kernel#open, which might allow Command Injection attacks, as demonstrated by a Resolv::Hosts::new argument beginning with a '|' character, a different vulnerability than CVE-2017-17405. NOTE: situations with untrusted input may be highly unlikely.

La función lazy_initialize en lib/resolv.rb en Ruby hasta la versión 2.4.3 utiliza Kernel#open, lo que podría permitir ataques de inyección de comandos, tal y como demuestra un argumento Resolv::Hosts::new que comience con un carácter "|". Esta es una vulnerabilidad diferente a CVE-2017-17405. NOTA: es altamente improbable que se den situaciones con entradas no fiables.

The "lazy_initialize" function in lib/resolv.rb did not properly process certain filenames. A remote attacker could possibly exploit this flaw to inject and execute arbitrary commands.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2017-12-20 CVE Reserved
2017-12-20 CVE Published
2023-05-08 EPSS Updated
2024-08-05 CVE Updated
2024-08-05 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection')

CAPEC

References (11)

URL	Tag	Source
https://lists.debian.org/debian-lts-announce/2017/12/msg00024.html	Mailing List
https://lists.debian.org/debian-lts-announce/2017/12/msg00025.html	Mailing List
https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html	Mailing List

URL	Date	SRC
https://github.com/ruby/ruby/pull/1777	2024-08-05

URL	Date	SRC

URL	Date	SRC
https://access.redhat.com/errata/RHSA-2018:0378	2018-08-03
https://access.redhat.com/errata/RHSA-2018:0583	2018-08-03
https://access.redhat.com/errata/RHSA-2018:0584	2018-08-03
https://access.redhat.com/errata/RHSA-2018:0585	2018-08-03
https://www.debian.org/security/2018/dsa-4259	2018-08-03
https://access.redhat.com/security/cve/CVE-2017-17790	2018-03-26
https://bugzilla.redhat.com/show_bug.cgi?id=1528218	2018-03-26

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Ruby-lang Search vendor "Ruby-lang"		Ruby Search vendor "Ruby-lang" for product "Ruby"				>= 2.2 <= 2.2.8 Search vendor "Ruby-lang" for product "Ruby" and version " >= 2.2 <= 2.2.8"		-		Affected
Ruby-lang Search vendor "Ruby-lang"		Ruby Search vendor "Ruby-lang" for product "Ruby"				>= 2.3 <= 2.3.5 Search vendor "Ruby-lang" for product "Ruby" and version " >= 2.3 <= 2.3.5"		-		Affected
Ruby-lang Search vendor "Ruby-lang"		Ruby Search vendor "Ruby-lang" for product "Ruby"				>= 2.4 <= 2.4.2 Search vendor "Ruby-lang" for product "Ruby" and version " >= 2.4 <= 2.4.2"		-		Affected
Ruby-lang Search vendor "Ruby-lang"		Ruby Search vendor "Ruby-lang" for product "Ruby"				2.5.0 Search vendor "Ruby-lang" for product "Ruby" and version "2.5.0"		preview1		Affected