Gentoo update for Mozilla Firefox



Risk High
Patch available YES
Number of vulnerabilities 6
CVE-ID CVE-2020-6821
CVE-2020-6822
CVE-2020-6823
CVE-2020-6824
CVE-2020-6825
CVE-2020-6826
CWE-ID CWE-125
CWE-787
CWE-264
CWE-521
CWE-119
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Gentoo Linux
Operating systems & Components / Operating system

Vendor Gentoo

Security Bulletin

This security bulletin contains information about 6 vulnerabilities.

1) Out-of-bounds read

EUVDB-ID: #VU26649

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]

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

Update the affected packages.
www-client/firefox to version: 68.7.0
www-client/firefox-bin to version: 68.7.0

Vulnerable software versions

Gentoo Linux: All versions

CPE2.3 External links

http://security.gentoo.org/
http://security.gentoo.org/glsa/202004-11


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) Out-of-bounds write

EUVDB-ID: #VU26650

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-2020-6822

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

Update the affected packages.
www-client/firefox to version: 68.7.0
www-client/firefox-bin to version: 68.7.0

Vulnerable software versions

Gentoo Linux: All versions

CPE2.3 External links

http://security.gentoo.org/
http://security.gentoo.org/glsa/202004-11


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) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU26651

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-2020-6823

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

Exploit availability: No

Description

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

The vulnerability exists due to incorrect processing of extension permissions. A malicious extension could have called browser.identity.launchWebAuthFlow, controlling the redirect_uri, and through the Promise returned, obtain the Auth code and gain access to the user's account at the service provider.

Mitigation

Update the affected packages.
www-client/firefox to version: 68.7.0
www-client/firefox-bin to version: 68.7.0

Vulnerable software versions

Gentoo Linux: All versions

CPE2.3 External links

http://security.gentoo.org/
http://security.gentoo.org/glsa/202004-11


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) Weak password requirements

EUVDB-ID: #VU26652

Risk: Low

CVSSv3.1: 1.6 [CVSS:3.1/AV:P/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-6824

CWE-ID: CWE-521 - Weak Password Requirements

Exploit availability: No

Description

The vulnerability allows a local user to gain access to another user password.

The vulnerability exists due to incorrect behavior of password generator when private browsing mode is user. If the victim had used password generator in a Private Browsing Window to generate a password and then closed the private window while leaving Firefox open, the attacker can open another private browsing session, visit the same website and Firefox will generate identical password.

Mitigation

Update the affected packages.
www-client/firefox to version: 68.7.0
www-client/firefox-bin to version: 68.7.0

Vulnerable software versions

Gentoo Linux: All versions

CPE2.3 External links

http://security.gentoo.org/
http://security.gentoo.org/glsa/202004-11


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.

5) Buffer overflow

EUVDB-ID: #VU26653

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-2020-6825

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 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.
www-client/firefox to version: 68.7.0
www-client/firefox-bin to version: 68.7.0

Vulnerable software versions

Gentoo Linux: All versions

CPE2.3 External links

http://security.gentoo.org/
http://security.gentoo.org/glsa/202004-11


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.

6) Buffer overflow

EUVDB-ID: #VU26654

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-2020-6826

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 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.
www-client/firefox to version: 68.7.0
www-client/firefox-bin to version: 68.7.0

Vulnerable software versions

Gentoo Linux: All versions

CPE2.3 External links

http://security.gentoo.org/
http://security.gentoo.org/glsa/202004-11


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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