Buffer Access with Incorrect Length Value Affecting ruby:2.5/rubygem-net-telnet package, versions <0:0.1.1-107.module+el8.4.0+10822+fe4fffb1


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.65% (81st percentile)

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  • Snyk IDSNYK-RHEL8-RUBY-4953659
  • published26 Jul 2021
  • disclosed31 Mar 2020

Introduced: 31 Mar 2020

CVE-2020-10933  (opens in a new tab)
CWE-805  (opens in a new tab)
CWE-200  (opens in a new tab)

How to fix?

Upgrade RHEL:8 ruby:2.5/rubygem-net-telnet to version 0:0.1.1-107.module+el8.4.0+10822+fe4fffb1 or higher.
This issue was patched in RHSA-2021:2587.

NVD Description

Note: Versions mentioned in the description apply only to the upstream ruby:2.5/rubygem-net-telnet package and not the ruby:2.5/rubygem-net-telnet package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

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 BasicSocket#read_nonblock(requested_size, buffer, exception: false), the method resizes the buffer to fit the requested size, but no data is copied. Thus, the buffer string provides the previous value of the heap. This may expose possibly sensitive data from the interpreter.

CVSS Scores

version 3.1