<p>Upgrade <code>Oracle:7</code> <code>firefox</code> to version 0:91.3.0-1.0.1.el7_9 or higher.<br>This issue was patched in <code>ELSA-2021-4116</code>.</p>

Origin Validation Error Affecting firefox package, versions <0:91.3.0-1.0.1.el7_9

Threat Intelligence

0.71% (81^st percentile)

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Snyk ID SNYK-ORACLE7-FIREFOX-2592010
published 10 Apr 2022
disclosed 8 Dec 2021

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Introduced: 8 Dec 2021

CVE-2021-38507 Open this link in a new tab CWE-346 Open this link in a new tab

How to fix?

Upgrade Oracle:7 firefox to version 0:91.3.0-1.0.1.el7_9 or higher.
This issue was patched in ELSA-2021-4116.

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.

The Opportunistic Encryption feature of HTTP2 (RFC 8164) allows a connection to be transparently upgraded to TLS while retaining the visual properties of an HTTP connection, including being same-origin with unencrypted connections on port 80. However, if a second encrypted port on the same IP address (e.g. port 8443) did not opt-in to opportunistic encryption; a network attacker could forward a connection from the browser to port 443 to port 8443, causing the browser to treat the content of port 8443 as same-origin with HTTP. This was resolved by disabling the Opportunistic Encryption feature, which had low usage. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.

References

CVSS Scores

version 3.1

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