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CVE-2020-26961 Affecting firefox package, versions <0:78.5.0-1.0.1.el7_9

Severity

 Recommended
high

Based on Oracle Linux security rating

    Threat Intelligence

    EPSS
    0.14% (52nd percentile)

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  • Snyk ID SNYK-ORACLE7-FIREFOX-2574955
  • published 10 Apr 2022
  • disclosed 9 Dec 2020
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Introduced: 9 Dec 2020

CVE-2020-26961 Open this link in a new tab

How to fix?

Upgrade Oracle:7 firefox to version 0:78.5.0-1.0.1.el7_9 or higher.
This issue was patched in ELSA-2020-5239.

NVD Description

Note: Versions mentioned in the description apply only to the upstream firefox package and not the firefox package as distributed by Oracle. See How to fix? for Oracle:7 relevant fixed versions and status.

When DNS over HTTPS is in use, it intentionally filters RFC1918 and related IP ranges from the responses as these do not make sense coming from a DoH resolver. However when an IPv4 address was mapped through IPv6, these addresses were erroneously let through, leading to a potential DNS Rebinding attack. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.

CVSS Scores

version 3.1
Expand this section

NVD

6.5 medium
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    Required
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    None
  • Integrity (I)
    High
  • Availability (A)
    None
Expand this section

SUSE

6.1 medium