Detections
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Fedora 34 : firefox (2021-74b76e593a)

high Nessus Plugin ID 152831

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Synopsis

The remote Fedora host is missing one or more security updates.

Description

The remote Fedora 34 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2021-74b76e593a advisory.

 - Firefox incorrectly accepted a newline in a HTTP/3 header, interpretting it as two separate headers. This allowed for a header splitting attack against servers using HTTP/3. This vulnerability affects Firefox < 91.0.1 and Thunderbird < 91.0.1. (CVE-2021-29991)

- - New upstream update (91.0.1) - Fixes font crashes (https://bugzilla.mozilla.org/1726515) (FEDORA-2021-74b76e593a) Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected firefox package.

See Also

https://bodhi.fedoraproject.org/updates/FEDORA-2021-74b76e593a

Plugin Details

Severity: High

ID: 152831

File Name: fedora_2021-74b76e593a.nasl

Version: 1.4

Type: local

Agent: unix

Published: 8/25/2021

Updated: 1/20/2022

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.2

CVSS v2

Risk Factor: Medium

Base Score: 5.8

Temporal Score: 4.3

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

CVSS Score Source: CVE-2021-29991

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.1

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

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

Vulnerability Information

CPE: p-cpe:/a:fedoraproject:fedora:firefox, cpe:/o:fedoraproject:fedora:34

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 8/24/2021

Vulnerability Publication Date: 8/24/2021

Reference Information

CVE: CVE-2021-29991