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CVE Vulnerabilities

CVE-2017-0903

Deserialization of Untrusted Data

Published: Oct 11, 2017 | Modified: Apr 20, 2025
CVSS 3.x
9.8
CRITICAL
Source:
NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
7.5 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P
RedHat/V2
RedHat/V3
5.6 MODERATE
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Ubuntu
MEDIUM
Vulnerability-free packages from our partners
Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2017-0903
CWEhttps://cwe.mitre.org/data/definitions/502.html

RubyGems versions between 2.0.0 and 2.6.13 are vulnerable to a possible remote code execution vulnerability. YAML deserialization of gem specifications can bypass class white lists. Specially crafted serialized objects can possibly be used to escalate to remote code execution.

Weakness

The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid.

Affected Software

Name Vendor Start Version End Version
Rubygems Rubygems 2.0.0 (including) 2.0.0 (including)
Rubygems Rubygems 2.0.0-preview2 (including) 2.0.0-preview2 (including)
Rubygems Rubygems 2.0.0-preview2.1 (including) 2.0.0-preview2.1 (including)
Rubygems Rubygems 2.0.0-preview2.2 (including) 2.0.0-preview2.2 (including)
Rubygems Rubygems 2.0.0-rc1 (including) 2.0.0-rc1 (including)
Rubygems Rubygems 2.0.0-rc2 (including) 2.0.0-rc2 (including)
Rubygems Rubygems 2.0.1 (including) 2.0.1 (including)
Rubygems Rubygems 2.0.2 (including) 2.0.2 (including)
Rubygems Rubygems 2.0.3 (including) 2.0.3 (including)
Rubygems Rubygems 2.0.4 (including) 2.0.4 (including)
Rubygems Rubygems 2.0.5 (including) 2.0.5 (including)
Rubygems Rubygems 2.0.6 (including) 2.0.6 (including)
Rubygems Rubygems 2.0.7 (including) 2.0.7 (including)
Rubygems Rubygems 2.0.8 (including) 2.0.8 (including)
Rubygems Rubygems 2.0.9 (including) 2.0.9 (including)
Rubygems Rubygems 2.0.10 (including) 2.0.10 (including)
Rubygems Rubygems 2.0.11 (including) 2.0.11 (including)
Rubygems Rubygems 2.0.12 (including) 2.0.12 (including)
Rubygems Rubygems 2.0.13 (including) 2.0.13 (including)
Rubygems Rubygems 2.0.14 (including) 2.0.14 (including)
Rubygems Rubygems 2.0.15 (including) 2.0.15 (including)
Rubygems Rubygems 2.0.16 (including) 2.0.16 (including)
Rubygems Rubygems 2.0.17 (including) 2.0.17 (including)
Rubygems Rubygems 2.1.0 (including) 2.1.0 (including)
Rubygems Rubygems 2.1.0.rc.1 (including) 2.1.0.rc.1 (including)
Rubygems Rubygems 2.1.0.rc.2 (including) 2.1.0.rc.2 (including)
Rubygems Rubygems 2.1.1 (including) 2.1.1 (including)
Rubygems Rubygems 2.1.2 (including) 2.1.2 (including)
Rubygems Rubygems 2.1.3 (including) 2.1.3 (including)
Rubygems Rubygems 2.1.4 (including) 2.1.4 (including)
Rubygems Rubygems 2.1.5 (including) 2.1.5 (including)
Rubygems Rubygems 2.1.6 (including) 2.1.6 (including)
Rubygems Rubygems 2.1.7 (including) 2.1.7 (including)
Rubygems Rubygems 2.1.8 (including) 2.1.8 (including)
Rubygems Rubygems 2.1.9 (including) 2.1.9 (including)
Rubygems Rubygems 2.1.10 (including) 2.1.10 (including)
Rubygems Rubygems 2.1.11 (including) 2.1.11 (including)
Rubygems Rubygems 2.2.0 (including) 2.2.0 (including)
Rubygems Rubygems 2.2.0.preiew.1 (including) 2.2.0.preiew.1 (including)
Rubygems Rubygems 2.2.0.rc.1 (including) 2.2.0.rc.1 (including)
Rubygems Rubygems 2.2.1 (including) 2.2.1 (including)
Rubygems Rubygems 2.2.2 (including) 2.2.2 (including)
Rubygems Rubygems 2.2.3 (including) 2.2.3 (including)
Rubygems Rubygems 2.2.4 (including) 2.2.4 (including)
Rubygems Rubygems 2.2.5 (including) 2.2.5 (including)
Rubygems Rubygems 2.3.0 (including) 2.3.0 (including)
Rubygems Rubygems 2.4.0 (including) 2.4.0 (including)
Rubygems Rubygems 2.4.1 (including) 2.4.1 (including)
Rubygems Rubygems 2.4.2 (including) 2.4.2 (including)
Rubygems Rubygems 2.4.3 (including) 2.4.3 (including)
Rubygems Rubygems 2.4.4 (including) 2.4.4 (including)
Rubygems Rubygems 2.4.5 (including) 2.4.5 (including)
Rubygems Rubygems 2.4.6 (including) 2.4.6 (including)
Rubygems Rubygems 2.4.7 (including) 2.4.7 (including)
Rubygems Rubygems 2.4.8 (including) 2.4.8 (including)
Rubygems Rubygems 2.5.0 (including) 2.5.0 (including)
Rubygems Rubygems 2.5.1 (including) 2.5.1 (including)
Rubygems Rubygems 2.5.2 (including) 2.5.2 (including)
Rubygems Rubygems 2.6.0 (including) 2.6.0 (including)
Rubygems Rubygems 2.6.1 (including) 2.6.1 (including)
Rubygems Rubygems 2.6.2 (including) 2.6.2 (including)
Rubygems Rubygems 2.6.3 (including) 2.6.3 (including)
Rubygems Rubygems 2.6.4 (including) 2.6.4 (including)
Rubygems Rubygems 2.6.5 (including) 2.6.5 (including)
Rubygems Rubygems 2.6.6 (including) 2.6.6 (including)
Rubygems Rubygems 2.6.7 (including) 2.6.7 (including)
Rubygems Rubygems 2.6.8 (including) 2.6.8 (including)
Rubygems Rubygems 2.6.9 (including) 2.6.9 (including)
Rubygems Rubygems 2.6.10 (including) 2.6.10 (including)
Rubygems Rubygems 2.6.11 (including) 2.6.11 (including)
Rubygems Rubygems 2.6.12 (including) 2.6.12 (including)
Rubygems Rubygems 2.6.13 (including) 2.6.13 (including)
Red Hat Enterprise Linux 7 RedHat ruby-0:2.0.0.648-33.el7_4 *
Red Hat Software Collections for Red Hat Enterprise Linux 6 RedHat rh-ruby24-ruby-0:2.4.2-86.el6 *
Red Hat Software Collections for Red Hat Enterprise Linux 6 RedHat rh-ruby22-ruby-0:2.2.9-19.el6 *
Red Hat Software Collections for Red Hat Enterprise Linux 6 RedHat rh-ruby23-ruby-0:2.3.6-67.el6 *
Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUS RedHat rh-ruby24-ruby-0:2.4.2-86.el6 *
Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUS RedHat rh-ruby22-ruby-0:2.2.9-19.el6 *
Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUS RedHat rh-ruby23-ruby-0:2.3.6-67.el6 *
Red Hat Software Collections for Red Hat Enterprise Linux 7 RedHat rh-ruby24-ruby-0:2.4.2-86.el7 *
Red Hat Software Collections for Red Hat Enterprise Linux 7 RedHat rh-ruby22-ruby-0:2.2.9-19.el7 *
Red Hat Software Collections for Red Hat Enterprise Linux 7 RedHat rh-ruby23-ruby-0:2.3.6-67.el7 *
Red Hat Software Collections for Red Hat Enterprise Linux 7.3 EUS RedHat rh-ruby24-ruby-0:2.4.2-86.el7 *
Red Hat Software Collections for Red Hat Enterprise Linux 7.3 EUS RedHat rh-ruby22-ruby-0:2.2.9-19.el7 *
Red Hat Software Collections for Red Hat Enterprise Linux 7.3 EUS RedHat rh-ruby23-ruby-0:2.3.6-67.el7 *
Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUS RedHat rh-ruby24-ruby-0:2.4.2-86.el7 *
Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUS RedHat rh-ruby22-ruby-0:2.2.9-19.el7 *
Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUS RedHat rh-ruby23-ruby-0:2.3.6-67.el7 *
Jruby Ubuntu artful *
Jruby Ubuntu cosmic *
Jruby Ubuntu esm-apps/xenial *
Jruby Ubuntu lunar *
Jruby Ubuntu trusty *
Jruby Ubuntu trusty/esm *
Jruby Ubuntu upstream *
Jruby Ubuntu xenial *
Jruby Ubuntu zesty *
Ruby2.0 Ubuntu trusty *
Ruby2.3 Ubuntu artful *
Ruby2.3 Ubuntu esm-infra/xenial *
Ruby2.3 Ubuntu xenial *
Ruby2.3 Ubuntu zesty *

Extended Description

It is often convenient to serialize objects for communication or to save them for later use. However, deserialized data or code can often be modified without using the provided accessor functions if it does not use cryptography to protect itself. Furthermore, any cryptography would still be client-side security – which is a dangerous security assumption. Data that is untrusted can not be trusted to be well-formed. When developers place no restrictions on “gadget chains,” or series of instances and method invocations that can self-execute during the deserialization process (i.e., before the object is returned to the caller), it is sometimes possible for attackers to leverage them to perform unauthorized actions, like generating a shell.

Potential Mitigations

  • Make fields transient to protect them from deserialization.
  • An attempt to serialize and then deserialize a class containing transient fields will result in NULLs where the transient data should be. This is an excellent way to prevent time, environment-based, or sensitive variables from being carried over and used improperly.

References

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