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rubygemsRubySecRUBY:RUBYGEMS-UPDATE-2017-0903
HistoryOct 08, 2017 - 9:00 p.m.

Unsafe Object Deserialization Vulnerability in RubyGems

2017-10-0821:00:00
RubySec
blog.rubygems.org
12

CVSS2

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

There is a possible unsafe object deserialization vulnerability in RubyGems.
It is possible for YAML deserialization of gem specifications to bypass class
white lists. Specially crafted serialized objects can possibly be used to
escalate to remote code execution.

Affected configurations

Vulners
Node
rubyrubygems-updateRange≤2.6.14
VendorProductVersionCPE
rubyrubygems-update*cpe:2.3:a:ruby:rubygems-update:*:*:*:*:*:*:*:*

CVSS2

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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