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Multiple vulnerabilities in Mozilla Firefox and Firefox ESR



Published: 2020-01-07 | Updated: 2020-01-08
Severity High
Patch available YES
Number of vulnerabilities 11
CVE ID CVE-2019-17016
CVE-2019-17017
CVE-2019-17018
CVE-2019-17019
CVE-2019-17015
CVE-2019-17020
CVE-2019-17021
CVE-2019-17022
CVE-2019-17023
CVE-2019-17024
CVE-2019-17025
CWE ID CWE-94
CWE-843
CWE-200
CWE-807
CWE-119
CWE-358
CWE-362
CWE-79
CWE-757
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Mozilla Firefox
Client/Desktop applications / Web browsers

Firefox ESR
Client/Desktop applications / Web browsers

Vendor Mozilla

Security Advisory

1) Code Injection

Severity: Medium

CVSSv3: 5.7 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2019-17016

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to improper input validation when pasting a tag from the clipboard into a rich text editor, the CSS sanitizer incorrectly rewrites a @namespace rule. This could allow for injection into certain types of websites resulting in data exfiltration.


Mitigation

Install updates from vendor's website.

Vulnerable software versions

Mozilla Firefox: 65.0, 65.0.1, 65.0.2, 66.0, 66.0.1, 66.0.2, 66.0.3, 66.0.4, 66.0.5, 67.0, 67.0.1, 67.0.2, 67.0.3, 67.0.4, 68.0, 68.0.1, 68.0.2, 69.0, 69.0.1, 69.0.2, 69.0.3, 70.0, 70.0.1, 71.0

Firefox ESR: 60.0, 60.0, 60.0.1, 60.0.1, 60.0.2, 60.0.2, 60.1.0, 60.1.0, 60.2.0, 60.2.0, 60.2.1, 60.2.1, 60.2.2, 60.2.2, 60.3.0, 60.3.0, 60.4.0, 60.4.0, 60.5.0, 60.5.0, 60.5.1, 60.5.1, 60.5.2, 60.5.2, 60.6.0, 60.6.0, 60.6.1, 60.6.1, 60.6.2, 60.6.2, 60.6.3, 60.6.3, 60.7.0, 60.7.0, 60.7.1, 60.7.1, 60.7.2, 60.7.2, 60.8.0, 60.8.0, 60.9.0, 60.9.0, 68.0, 68.0, 68.0.1, 68.0.1, 68.0.2, 68.0.2, 68.1.0, 68.1.0, 68.2.0, 68.2.0, 68.3.0, 68.3.0

CPE External links

https://www.mozilla.org/en-US/security/advisories/mfsa2020-01/
https://www.mozilla.org/en-US/security/advisories/mfsa2020-02/

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website.

Is there known malware, which exploits this vulnerability?

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

2) Type Confusion

Severity: Medium

CVSSv3: 6.5 [CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2019-17017

CWE-ID: CWE-843 - Access of Resource Using Incompatible Type ('Type Confusion')

Exploit availability: No

Description

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

The vulnerability exists due to a type confusion error when processing HTML content in XPCVariant.cpp. A remote attacker can create a specially crated web page, trigger a type confusion error and execute arbitrary code on the target system.

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

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Mozilla Firefox: 65.0, 65.0.1, 65.0.2, 66.0, 66.0.1, 66.0.2, 66.0.3, 66.0.4, 66.0.5, 67.0, 67.0.1, 67.0.2, 67.0.3, 67.0.4, 68.0, 68.0.1, 68.0.2, 69.0, 69.0.1, 69.0.2, 69.0.3, 70.0, 70.0.1, 71.0

Firefox ESR: 60.0, 60.0, 60.0, 60.0.1, 60.0.1, 60.0.1, 60.0.2, 60.0.2, 60.0.2, 60.1.0, 60.1.0, 60.1.0, 60.2.0, 60.2.0, 60.2.0, 60.2.1, 60.2.1, 60.2.1, 60.2.2, 60.2.2, 60.2.2, 60.3.0, 60.3.0, 60.3.0, 60.4.0, 60.4.0, 60.4.0, 60.5.0, 60.5.0, 60.5.0, 60.5.1, 60.5.1, 60.5.1, 60.5.2, 60.5.2, 60.5.2, 60.6.0, 60.6.0, 60.6.0, 60.6.1, 60.6.1, 60.6.1, 60.6.2, 60.6.2, 60.6.2, 60.6.3, 60.6.3, 60.6.3, 60.7.0, 60.7.0, 60.7.0, 60.7.1, 60.7.1, 60.7.1, 60.7.2, 60.7.2, 60.7.2, 60.8.0, 60.8.0, 60.8.0, 60.9.0, 60.9.0, 60.9.0, 68.0, 68.0, 68.0, 68.0.1, 68.0.1, 68.0.1, 68.0.2, 68.0.2, 68.0.2, 68.1.0, 68.1.0, 68.1.0, 68.2.0, 68.2.0, 68.2.0, 68.3.0, 68.3.0, 68.3.0

CPE External links

https://www.mozilla.org/en-US/security/advisories/mfsa2020-01/
https://www.mozilla.org/en-US/security/advisories/mfsa2020-02/

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website.

Is there known malware, which exploits this vulnerability?

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

3) Information disclosure

Severity: Low

CVSSv3: 2.9 [CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-17018

CWE-ID: CWE-200 - Information Exposure

Exploit availability: No

Description

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

When in Private Browsing Mode on Windows 10, the Windows keyboard may retain word suggestions to improve the accuracy of the keyboard. As a result, a local user can gain access to data, used during Private Browsing Mode.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Mozilla Firefox: 65.0, 65.0.1, 65.0.2, 66.0, 66.0.1, 66.0.2, 66.0.3, 66.0.4, 66.0.5, 67.0, 67.0.1, 67.0.2, 67.0.3, 67.0.4, 68.0, 68.0.1, 68.0.2, 69.0, 69.0.1, 69.0.2, 69.0.3, 70.0, 70.0.1, 71.0

CPE External links

https://www.mozilla.org/en-US/security/advisories/mfsa2020-01/

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website.

The attacker would have to login to the system and perform certain actions in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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

4) Reliance on Untrusted Inputs in a Security Decision

Severity: Medium

CVSSv3: 6.5 [CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2019-17019

CWE-ID: CWE-807 - Reliance on Untrusted Inputs in a Security Decision

Exploit availability: No

Description

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

The vulnerability exists due to incorrect processing of Python scripts. When Python is installed on Windows operating system, a python file being served with the MIME type of text/plain could be executed by Python instead of being opened as a text file when the Open option was selected upon download.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Mozilla Firefox: 65.0, 65.0.1, 65.0.2, 66.0, 66.0.1, 66.0.2, 66.0.3, 66.0.4, 66.0.5, 67.0, 67.0.1, 67.0.2, 67.0.3, 67.0.4, 68.0, 68.0.1, 68.0.2, 69.0, 69.0.1, 69.0.2, 69.0.3, 70.0, 70.0.1, 71.0

CPE External links

https://www.mozilla.org/en-US/security/advisories/mfsa2020-01/

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website.

Is there known malware, which exploits this vulnerability?

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

5) Buffer overflow

Severity: High

CVSSv3: 7.7 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2019-17015

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

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 during the initialization of a new content process. A remote attacker can create a specially crafted web site, 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.

Note, the vulnerability affects Windows users only.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Mozilla Firefox: 65.0, 65.0.1, 65.0.2, 66.0, 66.0.1, 66.0.2, 66.0.3, 66.0.4, 66.0.5, 67.0, 67.0.1, 67.0.2, 67.0.3, 67.0.4, 68.0, 68.0.1, 68.0.2, 69.0, 69.0.1, 69.0.2, 69.0.3, 70.0, 70.0.1, 71.0

Firefox ESR: 60.0, 60.0.1, 60.0.2, 60.1.0, 60.2.0, 60.2.1, 60.2.2, 60.3.0, 60.4.0, 60.5.0, 60.5.1, 60.5.2, 60.6.0, 60.6.1, 60.6.2, 60.6.3, 60.7.0, 60.7.1, 60.7.2, 60.8.0, 60.9.0, 68.0, 68.0.1, 68.0.2, 68.1.0, 68.2.0, 68.3.0

CPE External links

https://www.mozilla.org/en-US/security/advisories/mfsa2020-01/
https://www.mozilla.org/en-US/security/advisories/mfsa2020-02/

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website.

Is there known malware, which exploits this vulnerability?

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

6) Improperly implemented security check for standard

Severity: Medium

CVSSv3: 5.7 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2019-17020

CWE-ID: CWE-358 - Improperly Implemented Security Check for Standard

Exploit availability: No

Description

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

The vulnerability exists due to incorrect implementation of Content Security Policy that is not enforced for XSL stylesheets applied to XML documents. If the XSL sheet e.g. includes JavaScript, it would bypass any of the restrictions of the Content Security Policy applied to the XML document.

Successful exploitation of the vulnerability may allow an attacker to bypass security restrictions that rely on Content Security Policy and perform dangerous actions.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Mozilla Firefox: 65.0, 65.0.1, 65.0.2, 66.0, 66.0.1, 66.0.2, 66.0.3, 66.0.4, 66.0.5, 67.0, 67.0.1, 67.0.2, 67.0.3, 67.0.4, 68.0, 68.0.1, 68.0.2, 69.0, 69.0.1, 69.0.2, 69.0.3, 70.0, 70.0.1, 71.0

CPE External links

https://www.mozilla.org/en-US/security/advisories/mfsa2020-01/

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website.

Is there known malware, which exploits this vulnerability?

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

7) Race condition

Severity: Low

CVSSv3: 3.8 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-17021

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to a race condition that occurs during the initialization of a new content process. A remote attacker can exploit the race to gain access to potentially sensitive information, such as heap addresses from the parent process.

Note, this vulnerability affects Windows users only.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Mozilla Firefox: 65.0, 65.0.1, 65.0.2, 66.0, 66.0.1, 66.0.2, 66.0.3, 66.0.4, 66.0.5, 67.0, 67.0.1, 67.0.2, 67.0.3, 67.0.4, 68.0, 68.0.1, 68.0.2, 69.0, 69.0.1, 69.0.2, 69.0.3, 70.0, 70.0.1, 71.0

Firefox ESR: 60.0, 60.0.1, 60.0.2, 60.1.0, 60.2.0, 60.2.1, 60.2.2, 60.3.0, 60.4.0, 60.5.0, 60.5.1, 60.5.2, 60.6.0, 60.6.1, 60.6.2, 60.6.3, 60.7.0, 60.7.1, 60.7.2, 60.8.0, 60.9.0, 68.0, 68.0.1, 68.0.2, 68.1.0, 68.2.0, 68.3.0

CPE External links

https://www.mozilla.org/en-US/security/advisories/mfsa2020-01/
https://www.mozilla.org/en-US/security/advisories/mfsa2020-02/

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website.

Is there known malware, which exploits this vulnerability?

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

8) Cross-site scripting

Severity: Medium

CVSSv3: 5.3 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2019-17022

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data within the CSS sanitizer. When pasting a tag from the clipboard into a rich text editor, the CSS sanitizer does not escape < and > characters. If a webpage subsequently copies the node's innerHTML, assigning it to another innerHTML, this would result in an XSS vulnerability.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Mozilla Firefox: 65.0, 65.0.1, 65.0.2, 70.0, 70.0.1, 71.0

Firefox ESR: 60.0, 60.0.1, 60.0.2, 60.1.0, 60.2.0, 60.2.1, 60.2.2, 60.3.0, 60.4.0, 60.5.0, 60.5.1, 60.5.2, 60.6.0, 60.6.1, 60.6.2, 60.6.3, 60.7.0, 60.7.1, 60.7.2, 60.8.0, 60.9.0, 68.0, 68.0.1, 68.0.2, 68.1.0, 68.2.0, 68.3.0

CPE External links

https://www.mozilla.org/en-US/security/advisories/mfsa2020-01/

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website.

Is there known malware, which exploits this vulnerability?

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

9) Algorithm Downgrade

Severity: Low

CVSSv3: 3.2 [CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-17023

CWE-ID: CWE-757 - Selection of Less-Secure Algorithm During Negotiat

Exploit availability: No

Description

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

The vulnerability exists due to insecure negotiation After a HelloRetryRequest in Mozilla NSS that can lead to selection of a less secure protocol (e.g. TLS 1.2 or below) after the HelloRetryRequest TLS 1.3 is sent.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Mozilla Firefox: 65.0, 65.0.1, 65.0.2, 66.0, 66.0.1, 66.0.2, 66.0.3, 66.0.4, 66.0.5, 67.0, 67.0.1, 67.0.2, 67.0.3, 67.0.4, 68.0, 68.0.1, 68.0.2, 69.0, 69.0.1, 69.0.2, 69.0.3, 70.0, 70.0.1, 71.0

CPE External links

https://www.mozilla.org/en-US/security/advisories/mfsa2020-01/

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website.

Is there known malware, which exploits this vulnerability?

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

10) Buffer overflow

Severity: High

CVSSv3: 7.7 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2019-17024

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

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 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

Install updates from vendor's website.

Vulnerable software versions

Mozilla Firefox: 65.0, 65.0.1, 65.0.2, 66.0, 66.0.1, 66.0.2, 66.0.3, 66.0.4, 66.0.5, 67.0, 67.0.1, 67.0.2, 67.0.3, 67.0.4, 68.0, 68.0.1, 68.0.2, 69.0, 69.0.1, 69.0.2, 69.0.3, 70.0, 70.0.1, 71.0

Firefox ESR: 60.0, 60.0.1, 60.0.2, 60.1.0, 60.2.0, 60.2.1, 60.2.2, 60.3.0, 60.4.0, 60.5.0, 60.5.1, 60.5.2, 60.6.0, 60.6.1, 60.6.2, 60.6.3, 60.7.0, 60.7.1, 60.7.2, 60.8.0, 60.9.0, 68.0, 68.0.1, 68.0.2, 68.1.0, 68.2.0, 68.3.0

CPE External links

https://www.mozilla.org/en-US/security/advisories/mfsa2020-01/
https://www.mozilla.org/en-US/security/advisories/mfsa2020-02/

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website.

Is there known malware, which exploits this vulnerability?

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

11) Buffer overflow

Severity: High

CVSSv3: 7.7 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2019-17025

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

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 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

Install updates from vendor's website.

Vulnerable software versions

Mozilla Firefox: 65.0, 65.0.1, 65.0.2, 66.0, 66.0.1, 66.0.2, 66.0.3, 66.0.4, 66.0.5, 67.0, 67.0.1, 67.0.2, 67.0.3, 67.0.4, 68.0, 68.0.1, 68.0.2, 69.0, 69.0.1, 69.0.2, 69.0.3, 70.0, 70.0.1, 71.0

CPE External links

https://www.mozilla.org/en-US/security/advisories/mfsa2020-01/

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website.

Is there known malware, which exploits this vulnerability?

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