CVE-2018-16396

ruby: Tainted flags are not propagated in Array#pack and String#unpack with some directives

Severity Score

8.1

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

An issue was discovered in Ruby before 2.3.8, 2.4.x before 2.4.5, 2.5.x before 2.5.2, and 2.6.x before 2.6.0-preview3. It does not taint strings that result from unpacking tainted strings with some formats.

Se ha descubierto un problema en Ruby, en versiones anteriores a la 2.3.8, versiones 2.4.x anteriores a la 2.4.5, versiones 2.5.x anteriores a la 2.5.2 y versiones 2.6.x anteriores a la 2.6.0-preview3. No contamina las cadenas que resultan de desempaquetar cadenas contaminadas con algunos formatos.

*Credits: N/A

CVSS Scores

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

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2018-09-03 CVE Reserved
2018-11-03 CVE Published
2024-08-05 CVE Updated
2024-08-31 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-20: Improper Input Validation

CAPEC

References (17)

URL	Tag	Source
http://www.securitytracker.com/id/1042106	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/10/msg00020.html	Mailing List
https://security.netapp.com/advisory/ntap-20190221-0002	Third Party Advisory
https://www.ruby-lang.org/en/news/2018/10/17/ruby-2-3-8-released	Release Notes
https://www.ruby-lang.org/en/news/2018/10/17/ruby-2-4-5-released	Release Notes
https://www.ruby-lang.org/en/news/2018/10/17/ruby-2-5-2-released	Release Notes
https://www.ruby-lang.org/en/news/2018/11/06/ruby-2-6-0-preview3-released	Release Notes

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00036.html	2019-10-03
https://access.redhat.com/errata/RHSA-2018:3729	2019-10-03
https://access.redhat.com/errata/RHSA-2018:3730	2019-10-03
https://access.redhat.com/errata/RHSA-2018:3731	2019-10-03
https://access.redhat.com/errata/RHSA-2019:2028	2019-10-03
https://usn.ubuntu.com/3808-1	2019-10-03
https://www.debian.org/security/2018/dsa-4332	2019-10-03
https://www.ruby-lang.org/en/news/2018/10/17/not-propagated-taint-flag-in-some-formats-of-pack-cve-2018-16396	2019-10-03
https://access.redhat.com/security/cve/CVE-2018-16396	2020-07-07
https://bugzilla.redhat.com/show_bug.cgi?id=1643089	2020-07-07

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"				>= 2.3.0 <= 2.3.7 Search vendor "Ruby-lang" for product "Ruby" and version " >= 2.3.0 <= 2.3.7"		-		Affected
Ruby-lang Search vendor "Ruby-lang"		Ruby Search vendor "Ruby-lang" for product "Ruby"				>= 2.4.0 <= 2.4.4 Search vendor "Ruby-lang" for product "Ruby" and version " >= 2.4.0 <= 2.4.4"		-		Affected
Ruby-lang Search vendor "Ruby-lang"		Ruby Search vendor "Ruby-lang" for product "Ruby"				>= 2.5.0 <= 2.5.1 Search vendor "Ruby-lang" for product "Ruby" and version " >= 2.5.0 <= 2.5.1"		-		Affected
Ruby-lang Search vendor "Ruby-lang"		Ruby Search vendor "Ruby-lang" for product "Ruby"				2.6.0 Search vendor "Ruby-lang" for product "Ruby" and version "2.6.0"		preview1		Affected
Ruby-lang Search vendor "Ruby-lang"		Ruby Search vendor "Ruby-lang" for product "Ruby"				2.6.0 Search vendor "Ruby-lang" for product "Ruby" and version "2.6.0"		preview2		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				14.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "14.04"		lts		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				16.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "16.04"		lts		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				18.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "18.04"		lts		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				18.10 Search vendor "Canonical" for product "Ubuntu Linux" and version "18.10"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				8.0 Search vendor "Debian" for product "Debian Linux" and version "8.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"				6.0 Search vendor "Redhat" for product "Enterprise Linux" and version "6.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"				7.0 Search vendor "Redhat" for product "Enterprise Linux" and version "7.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"				7.4 Search vendor "Redhat" for product "Enterprise Linux" and version "7.4"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"				7.5 Search vendor "Redhat" for product "Enterprise Linux" and version "7.5"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"				7.6 Search vendor "Redhat" for product "Enterprise Linux" and version "7.6"		-		Affected