Alpine: multiple firefox-esr packages: security update to 78.7.0-r0

high Tenable Cloud Security Plugin ID 404450

Description

There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:

- When a HTTPS pages was embedded in a HTTP page, and there was a service worker registered for the former,
the service worker could have intercepted the request for the secure page despite the iframe not being a
secure context due to the (insecure) framing. This vulnerability affects Firefox < 84. (CVE-2020-26976)

- If a user clicked into a specifically crafted PDF, the PDF reader could be confused into leaking cross-
origin information, when said information is served as chunked data. This vulnerability affects Firefox <
85, Thunderbird < 78.7, and Firefox ESR < 78.7. (CVE-2021-23953)

- Using the new logical assignment operators in a JavaScript switch statement could have caused a type
confusion, leading to a memory corruption and a potentially exploitable crash. This vulnerability affects
Firefox < 85, Thunderbird < 78.7, and Firefox ESR < 78.7. (CVE-2021-23954)

- Performing garbage collection on re-declared JavaScript variables resulted in a user-after-poison, and a
potentially exploitable crash. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and Firefox
ESR < 78.7. (CVE-2021-23960)

- Mozilla developers reported memory safety bugs present in Firefox 84 and Firefox ESR 78.6. Some of these
bugs showed evidence of memory corruption and we presume that with enough effort some of these could have
been exploited to run arbitrary code. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and
Firefox ESR < 78.7. (CVE-2021-23964)

Plugin Details

Severity: High

ID: 404450

Version: Revision 1.26

Type: Local

Family: Alpine Linux Local Security Checks

Published: 10/31/2023

Updated: 12/4/2025

Supported Sensors: Agentless Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 57.12

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2021-23964

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 12/17/2020

Reference Information

CVE: CVE-2020-26976, CVE-2021-23953, CVE-2021-23954, CVE-2021-23960, CVE-2021-23964

Detections

Analytics