Multiple vulnerabilities in Mozilla Firefox and Firefox ESR
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 11 |
| CVE-ID | CVE-2020-15663 CVE-2020-15664 CVE-2020-12401 CVE-2020-6829 CVE-2020-12400 CVE-2020-15665 CVE-2020-15666 CVE-2020-15667 CVE-2020-15668 CVE-2020-15670 CVE-2020-15669 |
| CWE-ID | CWE-264 CWE-399 CWE-327 CWE-310 CWE-451 CWE-200 CWE-122 CWE-362 CWE-119 CWE-416 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Firefox ESR Client/Desktop applications / Web browsers Mozilla Firefox Client/Desktop applications / Web browsers Mozilla NSS Universal components / Libraries / Libraries used by multiple products |
| Vendor | Mozilla |
Security Bulletin
This security bulletin contains information about 11 vulnerabilities.
1) Permissions, Privileges, and Access Controls
EUVDB-ID: #VU46015
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]
CVE-ID: CVE-2020-15663
CWE-ID:
CWE-264 - Permissions, Privileges, and Access Controls
Exploit availability: No
DescriptionThe vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due Mozilla Maintenance Service does not check if the updater.exe file has a valid signature before executing it with elevated privileges. A local user with ability to replace the updater.exe file file can execute arbitrary code with SYSTEM privileges.
Install updates from vendor's website.
Vulnerable software versionsFirefox ESR: 60.0 - 78.1.0
Mozilla Firefox: 7.0.1 - 79.0
External linkshttp://www.mozilla.org/en-US/security/advisories/mfsa2020-38/
http://www.mozilla.org/en-US/security/advisories/mfsa2020-37/
http://www.mozilla.org/en-US/security/advisories/mfsa2020-36/
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.
2) Resource management error
EUVDB-ID: #VU46016
Risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-15664
CWE-ID:
CWE-399 - Resource Management Errors
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to bypass certain security restrictions.
The vulnerability exists due to the way Firefox handles prompts. By holding a reference to the eval() function from an
about:blank window, a malicious webpage could have gained access to the
InstallTrigger object which would allow them to prompt the user to
install an extension. Combined with user confusion, this could result in
an unintended or malicious extension being installed.
Install updates from vendor's website.
Vulnerable software versionsMozilla Firefox: 60.0 - 79.0
Firefox ESR: 60.0 - 78.1.0
External linkshttp://www.mozilla.org/en-US/security/advisories/mfsa2020-38/
http://www.mozilla.org/en-US/security/advisories/mfsa2020-37/
http://www.mozilla.org/en-US/security/advisories/mfsa2020-36/
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) Use of a broken or risky cryptographic algorithm
EUVDB-ID: #VU45798
Risk: Low
CVSSv3.1: 2.9 [CVSS:3.1/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-2020-12401
CWE-ID:
CWE-327 - Use of a Broken or Risky Cryptographic Algorithm
Exploit availability: No
DescriptionThe vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to usage of ECDSA signatures. A local user can perform a side channel attack and gain access to sensitive information.
Install updates from vendor's website.
Vulnerable software versionsMozilla NSS: 3.0.1 - 3.54
External linkshttp://security.gentoo.org/glsa/202008-08
http://access.redhat.com/security/cve/cve-2020-12401
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.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
4) Cryptographic issues
EUVDB-ID: #VU46019
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-2020-6829
CWE-ID:
CWE-310 - Cryptographic Issues
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to usage of wNAF point multiplication algorithm when performing EC scalar point multiplication, which leaked partial information about the nonce used during signature generation. A remote attacker can perform an electro-magnetic side-channel attack and recover the private key.
MitigationInstall updates from vendor's website.
Vulnerable software versionsMozilla Firefox: 70.0 - 79.0
External linkshttp://www.mozilla.org/en-US/security/advisories/mfsa2020-36/
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) Use of a broken or risky cryptographic algorithm
EUVDB-ID: #VU45797
Risk: Low
CVSSv3.1: 2.9 [CVSS:3.1/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-2020-12400
CWE-ID:
CWE-327 - Use of a Broken or Risky Cryptographic Algorithm
Exploit availability: No
DescriptionThe vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists in Mozilla NSS library in the way P-384 and P-521 curves are used in the generation of EDSA signatures, leaking partial information about the ECDSA nonce. Given a small number of ECDSA signatures, this information can be used to steal the private key.
MitigationInstall updates from vendor's website.
Vulnerable software versionsMozilla NSS: 3.0.1 - 3.54
External linkshttp://security.gentoo.org/glsa/202008-08
http://access.redhat.com/security/cve/cve-2020-12400
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.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
6) Spoofing attack
EUVDB-ID: #VU46020
Risk: Low
CVSSv3.1: 3.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-15665
CWE-ID:
CWE-451 - User Interface (UI) Misrepresentation of Critical Information (Clickjacking, spoofing)
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform spoofing attack.
The vulnerability exists due to Firefox does not reset the address bar after the beforeunload dialog is shown if the
user chooses to remain on the page. As a result, an incorrect URL is shown in the address bar.
Install updates from vendor's website.
Vulnerable software versionsMozilla Firefox: 70.0 - 79.0
External linkshttp://www.mozilla.org/en-US/security/advisories/mfsa2020-36/
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) Information disclosure
EUVDB-ID: #VU46021
Risk: Low
CVSSv3.1: 3.2 [CVSS:3.1/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-2020-15666
CWE-ID:
CWE-200 - Information exposure
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to excessive data output in an MediaError message. When trying to load a non-video in an audio/video context the exact status code (200, 302, 404, 500, 412, 403, etc.) was disclosed via the MediaError Message. This level of information leakage is inconsistent with the standardized onerror/onsuccess disclosure and can lead to inferring login status to services or device discovery on a local network among other attacks.
MitigationInstall updates from vendor's website.
Vulnerable software versionsMozilla Firefox: 70.0 - 79.0
External linkshttp://www.mozilla.org/en-US/security/advisories/mfsa2020-36/
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) Heap-based buffer overflow
EUVDB-ID: #VU46022
Risk: Low
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-15667
CWE-ID:
CWE-122 - Heap-based Buffer Overflow
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing a MAR update file, after the signature has been validated. A remote attacker can pass specially crafted data to the application, trigger heap-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system but requires that the malicious file is signed with a valid Mozilla-controlled signing key.
MitigationInstall updates from vendor's website.
Vulnerable software versionsMozilla Firefox: 70.0 - 79.0
External linkshttp://www.mozilla.org/en-US/security/advisories/mfsa2020-36/
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) Race condition
EUVDB-ID: #VU46023
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-2020-15668
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to a race condition when reading certification information during certificate import. A remote attacker can exploit the race and gain gain access to potentially sensitive data.
Install updates from vendor's website.
Vulnerable software versionsMozilla Firefox: 70.0 - 79.0
External linkshttp://www.mozilla.org/en-US/security/advisories/mfsa2020-36/
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
EUVDB-ID: #VU46017
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-2020-15670
CWE-ID:
CWE-119 - Memory corruption
Exploit availability: No
DescriptionThe 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.
MitigationInstall updates from vendor's website.
Vulnerable software versionsFirefox ESR: 78.0 - 78.1.0
Mozilla Firefox: 60.0 - 79.0
External linkshttp://www.mozilla.org/en-US/security/advisories/mfsa2020-38/
http://www.mozilla.org/en-US/security/advisories/mfsa2020-36/
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) Use-after-free
EUVDB-ID: #VU46018
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-2020-15669
CWE-ID:
CWE-416 - Use After Free
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error when aborting operations in browser. A remote attacker can create a specially crafted web page, trick the victim into visiting it, trigger a use-after-free error and execute arbitrary code on the system.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsFirefox ESR: 60.0 - 68.11.0
External linkshttp://www.mozilla.org/en-US/security/advisories/mfsa2020-37/
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.
