Ubuntu regressions update for Firefox



Published: 2020-05-12 | Updated: 2021-07-01
Risk High
Patch available YES
Number of vulnerabilities 8
CVE-ID CVE-2020-6831
CVE-2020-12387
CVE-2020-12390
CVE-2020-12391
CVE-2020-12394
CVE-2020-12395
CVE-2020-12396
CVE-2020-12392
CWE-ID CWE-119
CWE-416
CWE-20
CWE-264
CWE-451
Exploitation vector Network
Public exploit N/A
Vulnerable software
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firefox (Ubuntu package)
Operating systems & Components / Operating system package or component

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains information about 8 vulnerabilities.

1) Buffer overflow

EUVDB-ID: #VU27532

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-6831

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 SCTP chunks in WebRTC. A remote attacker can create a specially crafted web page, 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 packages.

Ubuntu 20.04 LTS
firefox - 76.0.1+build1-0ubuntu0.20.04.1
Ubuntu 19.10
firefox - 76.0.1+build1-0ubuntu0.19.10.1
Ubuntu 18.04 LTS
firefox - 76.0.1+build1-0ubuntu0.18.04.1
Ubuntu 16.04 LTS
firefox - 76.0.1+build1-0ubuntu0.16.04.1

Vulnerable software versions

firefox (Ubuntu package): 47.0+build3-0ubuntu0.16.04.1 - 75.0+build3-0ubuntu0.19.10.1

External links

http://usn.ubuntu.com/4353-2/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Use-after-free

EUVDB-ID: #VU27529

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-12387

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error caused by the race condition when running shutdown code for Web Worker. A remote attacker can create a specially crafted website, trick the victim into visiting it, trigger a use-after-free error and execute arbitrary code on the target system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation

Update the affected packages.

Ubuntu 20.04 LTS
firefox - 76.0.1+build1-0ubuntu0.20.04.1
Ubuntu 19.10
firefox - 76.0.1+build1-0ubuntu0.19.10.1
Ubuntu 18.04 LTS
firefox - 76.0.1+build1-0ubuntu0.18.04.1
Ubuntu 16.04 LTS
firefox - 76.0.1+build1-0ubuntu0.16.04.1

Vulnerable software versions

firefox (Ubuntu package): 47.0+build3-0ubuntu0.16.04.1 - 75.0+build3-0ubuntu0.19.10.1

External links

http://usn.ubuntu.com/4353-2/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Input validation error

EUVDB-ID: #VU27533

Risk: Medium

CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-12390

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists due to incorrect origin serialization of nsIPrincipal.origin for IPv6 addresses. A remote attacker can bypass implemented security restrictions with a specially crafted URL.

Mitigation

Update the affected packages.

Ubuntu 20.04 LTS
firefox - 76.0.1+build1-0ubuntu0.20.04.1
Ubuntu 19.10
firefox - 76.0.1+build1-0ubuntu0.19.10.1
Ubuntu 18.04 LTS
firefox - 76.0.1+build1-0ubuntu0.18.04.1
Ubuntu 16.04 LTS
firefox - 76.0.1+build1-0ubuntu0.16.04.1

Vulnerable software versions

firefox (Ubuntu package): 47.0+build3-0ubuntu0.16.04.1 - 75.0+build3-0ubuntu0.19.10.1

External links

http://usn.ubuntu.com/4353-2/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

4) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU27534

Risk: Medium

CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-12391

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 documents formed using data: URLs in an object element failed to inherit the CSP of the creating context. A remote attacker can execute arbitrary scripts that should have been blocked, albeit with a unique opaque origin.

Mitigation

Update the affected packages.

Ubuntu 20.04 LTS
firefox - 76.0.1+build1-0ubuntu0.20.04.1
Ubuntu 19.10
firefox - 76.0.1+build1-0ubuntu0.19.10.1
Ubuntu 18.04 LTS
firefox - 76.0.1+build1-0ubuntu0.18.04.1
Ubuntu 16.04 LTS
firefox - 76.0.1+build1-0ubuntu0.16.04.1

Vulnerable software versions

firefox (Ubuntu package): 47.0+build3-0ubuntu0.16.04.1 - 75.0+build3-0ubuntu0.19.10.1

External links

http://usn.ubuntu.com/4353-2/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

5) Spoofing attack

EUVDB-ID: #VU27537

Risk: Low

CVSSv3.1: 2.8 [CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-12394

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

Exploit availability: No

Description

The vulnerability allows a local user to perform spoofing attack.

The vulnerability exists due to a logic flaw in the location bar implementation. A local user can spoof  the current location by selecting a different origin and removing focus from the input element.

Mitigation

Update the affected packages.

Ubuntu 20.04 LTS
firefox - 76.0.1+build1-0ubuntu0.20.04.1
Ubuntu 19.10
firefox - 76.0.1+build1-0ubuntu0.19.10.1
Ubuntu 18.04 LTS
firefox - 76.0.1+build1-0ubuntu0.18.04.1
Ubuntu 16.04 LTS
firefox - 76.0.1+build1-0ubuntu0.16.04.1

Vulnerable software versions

firefox (Ubuntu package): 47.0+build3-0ubuntu0.16.04.1 - 75.0+build3-0ubuntu0.19.10.1

External links

http://usn.ubuntu.com/4353-2/


Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

6) Buffer overflow

EUVDB-ID: #VU27538

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-12395

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 web page, 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 packages.

Ubuntu 20.04 LTS
firefox - 76.0.1+build1-0ubuntu0.20.04.1
Ubuntu 19.10
firefox - 76.0.1+build1-0ubuntu0.19.10.1
Ubuntu 18.04 LTS
firefox - 76.0.1+build1-0ubuntu0.18.04.1
Ubuntu 16.04 LTS
firefox - 76.0.1+build1-0ubuntu0.16.04.1

Vulnerable software versions

firefox (Ubuntu package): 47.0+build3-0ubuntu0.16.04.1 - 75.0+build3-0ubuntu0.19.10.1

External links

http://usn.ubuntu.com/4353-2/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

7) Buffer overflow

EUVDB-ID: #VU27539

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-12396

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 website, trick the victim into visiting 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 packages.

Ubuntu 20.04 LTS
firefox - 76.0.1+build1-0ubuntu0.20.04.1
Ubuntu 19.10
firefox - 76.0.1+build1-0ubuntu0.19.10.1
Ubuntu 18.04 LTS
firefox - 76.0.1+build1-0ubuntu0.18.04.1
Ubuntu 16.04 LTS
firefox - 76.0.1+build1-0ubuntu0.16.04.1

Vulnerable software versions

firefox (Ubuntu package): 47.0+build3-0ubuntu0.16.04.1 - 75.0+build3-0ubuntu0.19.10.1

External links

http://usn.ubuntu.com/4353-2/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

8) Input validation error

EUVDB-ID: #VU27535

Risk: Low

CVSSv3.1: 2.7 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-12392

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists due to the "Copy as cURL" feature of Devtools network tab did not properly escape the HTTP POST data of a request, which can be controlled by the website. If a user used the 'Copy as cURL' feature and pasted the command into a terminal, it could have resulted in the disclosure of local files.

Mitigation

Update the affected packages.

Ubuntu 20.04 LTS
firefox - 76.0.1+build1-0ubuntu0.20.04.1
Ubuntu 19.10
firefox - 76.0.1+build1-0ubuntu0.19.10.1
Ubuntu 18.04 LTS
firefox - 76.0.1+build1-0ubuntu0.18.04.1
Ubuntu 16.04 LTS
firefox - 76.0.1+build1-0ubuntu0.16.04.1

Vulnerable software versions

firefox (Ubuntu package): 47.0+build3-0ubuntu0.16.04.1 - 75.0+build3-0ubuntu0.19.10.1

External links

http://usn.ubuntu.com/4353-2/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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