**Issue Overview:**
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. (CVE-2020-10663)
An issue was discovered in Ruby through 2.5.8, 2.6.x through 2.6.6, and 2.7.x through 2.7.1. WEBrick, a simple HTTP server bundled with Ruby, had not checked the transfer-encoding header value rigorously. An attacker may potentially exploit this issue to bypass a reverse proxy (which also has a poor header check), which may lead to an HTTP Request Smuggling attack. (CVE-2020-25613)
**Affected Packages:**
ruby
**Issue Correction:**
Run _yum update ruby_ to update your system.
**New Packages:**
aarch64:
ruby-2.0.0.648-36.amzn2.0.2.aarch64
ruby-devel-2.0.0.648-36.amzn2.0.2.aarch64
ruby-libs-2.0.0.648-36.amzn2.0.2.aarch64
rubygem-bigdecimal-1.2.0-36.amzn2.0.2.aarch64
rubygem-io-console-0.4.2-36.amzn2.0.2.aarch64
rubygem-json-1.7.7-36.amzn2.0.2.aarch64
rubygem-psych-2.0.0-36.amzn2.0.2.aarch64
ruby-tcltk-2.0.0.648-36.amzn2.0.2.aarch64
ruby-debuginfo-2.0.0.648-36.amzn2.0.2.aarch64
i686:
ruby-2.0.0.648-36.amzn2.0.2.i686
ruby-devel-2.0.0.648-36.amzn2.0.2.i686
ruby-libs-2.0.0.648-36.amzn2.0.2.i686
rubygem-bigdecimal-1.2.0-36.amzn2.0.2.i686
rubygem-io-console-0.4.2-36.amzn2.0.2.i686
rubygem-json-1.7.7-36.amzn2.0.2.i686
rubygem-psych-2.0.0-36.amzn2.0.2.i686
ruby-tcltk-2.0.0.648-36.amzn2.0.2.i686
ruby-debuginfo-2.0.0.648-36.amzn2.0.2.i686
noarch:
rubygems-2.0.14.1-36.amzn2.0.2.noarch
rubygems-devel-2.0.14.1-36.amzn2.0.2.noarch
rubygem-rake-0.9.6-36.amzn2.0.2.noarch
ruby-irb-2.0.0.648-36.amzn2.0.2.noarch
rubygem-rdoc-4.0.0-36.amzn2.0.2.noarch
ruby-doc-2.0.0.648-36.amzn2.0.2.noarch
rubygem-minitest-4.3.2-36.amzn2.0.2.noarch
src:
ruby-2.0.0.648-36.amzn2.0.2.src
x86_64:
ruby-2.0.0.648-36.amzn2.0.2.x86_64
ruby-devel-2.0.0.648-36.amzn2.0.2.x86_64
ruby-libs-2.0.0.648-36.amzn2.0.2.x86_64
rubygem-bigdecimal-1.2.0-36.amzn2.0.2.x86_64
rubygem-io-console-0.4.2-36.amzn2.0.2.x86_64
rubygem-json-1.7.7-36.amzn2.0.2.x86_64
rubygem-psych-2.0.0-36.amzn2.0.2.x86_64
ruby-tcltk-2.0.0.648-36.amzn2.0.2.x86_64
ruby-debuginfo-2.0.0.648-36.amzn2.0.2.x86_64
### Additional References
Red Hat: [CVE-2020-10663](<https://access.redhat.com/security/cve/CVE-2020-10663>), [CVE-2020-25613](<https://access.redhat.com/security/cve/CVE-2020-25613>), [CVE-2021-31799](<https://access.redhat.com/security/cve/CVE-2021-31799>)
Mitre: [CVE-2020-10663](<https://vulners.com/cve/CVE-2020-10663>), [CVE-2020-25613](<https://vulners.com/cve/CVE-2020-25613>), [CVE-2021-31799](<https://vulners.com/cve/CVE-2021-31799>)
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(CVE-2020-10663)\n\n - An issue was discovered in Ruby 2.5.x through 2.5.7, 2.6.x through 2.6.5, and 2.7.0. If a victim calls\n BasicSocket#read_nonblock(requested_size, buffer, exception: false), the method resizes the buffer to fit\n the requested size, but no data is copied. Thus, the buffer string provides the previous value of the\n heap. This may expose possibly sensitive data from the interpreter. (CVE-2020-10933)\n\n - An issue was discovered in Ruby through 2.5.8, 2.6.x through 2.6.6, and 2.7.x through 2.7.1. WEBrick, a\n simple HTTP server bundled with Ruby, had not checked the transfer-encoding header value rigorously. An\n attacker may potentially exploit this issue to bypass a reverse proxy (which also has a poor header\n check), which may lead to an HTTP Request Smuggling attack. (CVE-2020-25613)\n\n - The REXML gem before 3.2.5 in Ruby before 2.6.7, 2.7.x before 2.7.3, and 3.x before 3.0.1 does not\n properly address XML round-trip issues. 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Medium: ruby
