Multiple vulnerabilities in Firefox ESR



Published: 2020-04-07
Risk High
Patch available YES
Number of vulnerabilities 5
CVE ID CVE-2020-6821
CVE-2020-6822
CVE-2020-6825
CVE-2020-6828
CVE-2020-6827
CWE ID CWE-125
CWE-787
CWE-119
CWE-264
CWE-451
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Firefox ESR
Client/Desktop applications / Web browsers

Vendor Mozilla

Security Advisory

1) Out-of-bounds read

Risk: Medium

CVSSv3.1: 4.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2020-6821

CWE-ID: CWE-125 - Out-of-bounds Read

Exploit availability: No

Description

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

The vulnerability exists due to a boundary condition when using WebGL copyTexSubImage method. A remote attacker can create a specially crafted web page, trick the victim into opening it, trigger out-of-bounds read error and read contents of uninitialized memory on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

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, 68.4.0, 68.4.1, 68.4.2, 68.5.0, 68.6.0, 68.6.1

CPE External links

https://www.mozilla.org/en-US/security/advisories/mfsa2020-13/

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) Out-of-bounds write

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] [PCI]

CVE-ID: CVE-2020-6822

CWE-ID: CWE-787 - Out-of-bounds Write

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 condition in GMPDecodeData when processing images larger than 4Gb on 32-bit builds. A remote attacker can create a specially crafted image, trick the victim into opening it, trigger out-of-bounds write and execute arbitrary code on the target system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

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, 68.4.0, 68.4.1, 68.4.2, 68.5.0, 68.6.0, 68.6.1

CPE External links

https://www.mozilla.org/en-US/security/advisories/mfsa2020-13/

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) Buffer overflow

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] [PCI]

CVE-ID: CVE-2020-6825

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 update from vendor's website.

Vulnerable software versions

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, 68.4.0, 68.4.1, 68.4.2, 68.5.0, 68.6.0, 68.6.1

CPE External links

https://www.mozilla.org/en-US/security/advisories/mfsa2020-13/

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.

4) Permissions, Privileges, and Access Controls

Risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2020-6828

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

Exploit availability: No

Description

A malicious Android application could craft an Intent that would have been processed by Firefox for Android and potentially result in a file overwrite in the user's profile directory. One exploitation vector for this would be to supply a user.js file providing arbitrary malicious preference values. Control of arbitrary preferences can lead to sufficient compromise such that it is generally equivalent to arbitrary code execution.

Note: This issue only affects Firefox for Android. Other operating systems are unaffected.

Mitigation

Install update from vendor's website.

Vulnerable software versions

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, 68.4.0, 68.4.1, 68.4.2, 68.5.0, 68.6.0, 68.6.1

CPE External links

https://www.mozilla.org/en-US/security/advisories/mfsa2020-13/

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.

5) Spoofing attack

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-6827

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 processing of intent://-schemed URL. A remote attacker can trick Firefox for Android into displaying the incorrect URI.

Note: This issue only affects Firefox for Android. Other operating systems are unaffected.

Mitigation

Install update from vendor's website.

Vulnerable software versions

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, 68.4.0, 68.4.1, 68.4.2, 68.5.0, 68.6.0, 68.6.1

CPE External links

https://www.mozilla.org/en-US/security/advisories/mfsa2020-13/

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.



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