// For flags

CVE-2018-1000076

rubygems: Improper verification of signatures in tarball allows to install mis-signed gem

Severity Score

9.8
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

RubyGems version Ruby 2.2 series: 2.2.9 and earlier, Ruby 2.3 series: 2.3.6 and earlier, Ruby 2.4 series: 2.4.3 and earlier, Ruby 2.5 series: 2.5.0 and earlier, prior to trunk revision 62422 contains a Improper Verification of Cryptographic Signature vulnerability in package.rb that can result in a mis-signed gem could be installed, as the tarball would contain multiple gem signatures.. This vulnerability appears to have been fixed in 2.7.6.

Las versiones de RubyGems de la serie Ruby 2.2: 2.2.9 y anteriores, de la serie Ruby 2.3: 2.3.6 y anteriores, de la serie Ruby 2.4: 2.4.3 y anteriores, y de la serie Ruby 2.5: versiones 2.5.0 y anteriores, anteriores a la revisión del trunk 62422 contiene una vulnerabilidad de verificación incorrecta de firma criptográfica en package.rb que puede resultar en la instalación de una gema mal firmada, ya que tarball contendría múltiples firmas de gema. La vulnerabilidad parece haber sido solucionada en la versión 2.7.6.

*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
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None
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
  • 2018-02-21 CVE Reserved
  • 2018-03-13 CVE Published
  • 2023-10-07 EPSS Updated
  • 2024-08-05 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-347: Improper Verification of Cryptographic Signature
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Rubygems
Search vendor "Rubygems"
 Rubygems
Search vendor "Rubygems" for product "Rubygems"
 <= 2.2.9
Search vendor "Rubygems" for product "Rubygems" and version " <= 2.2.9"
-
Affected
Rubygems
Search vendor "Rubygems"
 Rubygems
Search vendor "Rubygems" for product "Rubygems"
 <= 2.3.6
Search vendor "Rubygems" for product "Rubygems" and version " <= 2.3.6"
-
Affected
Rubygems
Search vendor "Rubygems"
 Rubygems
Search vendor "Rubygems" for product "Rubygems"
 <= 2.4.3
Search vendor "Rubygems" for product "Rubygems" and version " <= 2.4.3"
-
Affected
Rubygems
Search vendor "Rubygems"
 Rubygems
Search vendor "Rubygems" for product "Rubygems"
 <= 2.5.0
Search vendor "Rubygems" for product "Rubygems" and version " <= 2.5.0"
-
Affected
Debian
Search vendor "Debian"
 Debian Linux
Search vendor "Debian" for product "Debian Linux"
 7.0
Search vendor "Debian" for product "Debian Linux" and version "7.0"
-
Affected