Buffer Access with Incorrect Length Value Affecting rubygem-psych package, versions <0:3.0.2-107.module+el8.4.0+10822+fe4fffb1


Severity

Recommended
0.0
medium
0
10

Based on CentOS security rating

    Threat Intelligence

    EPSS
    0.65% (80th percentile)

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  • Snyk ID SNYK-CENTOS8-RUBYGEMPSYCH-2112800
  • published 26 Jul 2021
  • disclosed 31 Mar 2020

How to fix?

Upgrade Centos:8 rubygem-psych to version 0:3.0.2-107.module+el8.4.0+10822+fe4fffb1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream rubygem-psych package and not the rubygem-psych package as distributed by Centos. See How to fix? for Centos: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
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NVD

5.3 medium
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    Low
  • Integrity (I)
    None
  • Availability (A)
    None
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Red Hat

5.3 medium
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SUSE

5.3 medium