Ubuntu update for firefox



Published: 2021-06-02
Risk High
Patch available YES
Number of vulnerabilities 5
CVE-ID CVE-2021-29959
CVE-2021-29960
CVE-2021-29961
CVE-2021-29966
CVE-2021-29967
CWE-ID CWE-264
CWE-200
CWE-451
CWE-119
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Ubuntu
Operating systems & Components / Operating system

firefox (Ubuntu package)
Operating systems & Components / Operating system package or component

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains information about 5 vulnerabilities.

1) Security restrictions bypass

EUVDB-ID: #VU53713

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-29959

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to the way user is prompted to access microphone and camera by the website. When a user has already allowed a website to access microphone and camera, disabling camera sharing would not fully prevent the website from re-enabling it without an additional prompt. This was only possible if the website kept recording with the microphone until re-enabling the camera.

Mitigation

Update the affected package firefox to the latest version.

Vulnerable software versions

Ubuntu: 20.10, 21.04, 20.04, 18.04

firefox (Ubuntu package): before 89.0+build2-0ubuntu0.20.04.2


CPE2.3 External links

http://ubuntu.com/security/notices/USN-4978-1

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

2) Information disclosure

EUVDB-ID: #VU53710

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-29960

CWE-ID: CWE-200 - Information Exposure

Exploit availability: No

Description

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to the way firefox uses cache for the last filename used for printing a file. Firefox usually suggests the web page title. The caching and suggestion techniques combined may have lead to the title of a website visited during private browsing mode being stored on disk.

Mitigation

Update the affected package firefox to the latest version.

Vulnerable software versions

Ubuntu: 20.10, 21.04, 20.04, 18.04

firefox (Ubuntu package): before 89.0+build2-0ubuntu0.20.04.2


CPE2.3 External links

http://ubuntu.com/security/notices/USN-4978-1

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

3) Spoofing attack

EUVDB-ID: #VU53711

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-29961

CWE-ID: CWE-451 - User Interface (UI) Misrepresentation of Critical Information (Clickjacking, spoofing)

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to incorrect rendering an oversized <select> element. A remote attacker can spoof page content.

Mitigation

Update the affected package firefox to the latest version.

Vulnerable software versions

Ubuntu: 20.10, 21.04, 20.04, 18.04

firefox (Ubuntu package): before 89.0+build2-0ubuntu0.20.04.2


CPE2.3 External links

http://ubuntu.com/security/notices/USN-4978-1

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

4) Buffer overflow

EUVDB-ID: #VU53708

Risk: High

CVSSv3.1:

CVE-ID: CVE-2021-29966

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when processing HTML content. A remote attacker can create a specially crafted webpage, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update the affected package firefox to the latest version.

Vulnerable software versions

Ubuntu: 20.10, 21.04, 20.04, 18.04

firefox (Ubuntu package): before 89.0+build2-0ubuntu0.20.04.2


CPE2.3 External links

http://ubuntu.com/security/notices/USN-4978-1

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

5) Buffer overflow

EUVDB-ID: #VU53707

Risk: High

CVSSv3.1:

CVE-ID: CVE-2021-29967

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when processing HTML content. A remote attacker can create a specially crafted webpage, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update the affected package firefox to the latest version.

Vulnerable software versions

Ubuntu: 20.10, 21.04, 20.04, 18.04

firefox (Ubuntu package): before 89.0+build2-0ubuntu0.20.04.2


CPE2.3 External links

http://ubuntu.com/security/notices/USN-4978-1

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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