Input validation error in Ruby - CVE-2020-10663
Published: April 28, 2020 / Updated: August 3, 2020
Vulnerability identifier: #VU32971
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2020-10663
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Ruby
Affected software:
Ruby
Ruby
Detailed vulnerability description
The vulnerability allows a remote non-authenticated attacker to manipulate data.
The JSON gem through 2.2.0 for Ruby, as used in Ruby 2.4 through 2.4.9, 2.5 through 2.5.7, and 2.6 through 2.6.5, has an Unsafe Object Creation Vulnerability. This is quite similar to CVE-2013-0269, but does not rely on poor garbage-collection behavior within Ruby. Specifically, use of JSON parsing methods can lead to creation of a malicious object within the interpreter, with adverse effects that are application-dependent.
How to mitigate CVE-2020-10663
Install update from vendor's website.
Sources
- http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00004.html
- https://lists.debian.org/debian-lts-announce/2020/04/msg00030.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7QL6MJD2BO4IRJ5CJFNMCDYMQQFT24BJ/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/F4TNVTT66VPRMX5UZYSDGSVRXKKDDDU5/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NK2PBXWMFRUD7U7Q7LHV4KYLYID77RI4/
- https://www.debian.org/security/2020/dsa-4721
- https://www.ruby-lang.org/en/news/2020/03/19/json-dos-cve-2020-10663/