Multiple vulnerabilities in Mozilla Firefox and Firefox ESR
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 8 |
| CVE-ID | CVE-2022-26383 CVE-2022-26384 CVE-2022-26387 CVE-2022-26381 CVE-2022-26382 CVE-2022-26385 CVE-2022-0843 CVE-2022-26386 |
| CWE-ID | CWE-357 CWE-264 CWE-367 CWE-416 CWE-200 CWE-119 CWE-284 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Mozilla Firefox Client/Desktop applications / Web browsers Firefox ESR Client/Desktop applications / Web browsers |
| Vendor | Mozilla |
Security Bulletin
This security bulletin contains information about 8 vulnerabilities.
1) Insufficient UI Warning of Dangerous Operations
EUVDB-ID: #VU61102
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-2022-26383
CWE-ID:
CWE-357 - Insufficient UI Warning of Dangerous Operations
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform spoofing attack.
The vulnerability exists due to an error when resizing a popup after requesting fullscreen access. The popup would not display the fullscreen notification, which allows a remote attacker to perform spoofing attack.
Install updates from vendor's website.
Vulnerable software versionsMozilla Firefox: 90.0 - 97.0.2
Firefox ESR: 91.0 - 91.6.1
External linkshttp://www.mozilla.org/en-US/security/advisories/mfsa2022-10/
http://www.mozilla.org/en-US/security/advisories/mfsa2022-11/
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) Security restrictions bypass
EUVDB-ID: #VU61103
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-2022-26384
CWE-ID:
CWE-264 - Permissions, Privileges, and Access Controls
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to a logic error when processing iframes. If an attacker can control the contents of an iframe sandboxed with allow-popups but not allow-scripts, it is possible to craft a link that, when clicked, would lead to JavaScript execution in violation of the sandbox.
Install updates from vendor's website.
Vulnerable software versionsMozilla Firefox: 90.0 - 97.0.2
Firefox ESR: 91.0 - 91.6.1
External linkshttp://www.mozilla.org/en-US/security/advisories/mfsa2022-10/
http://www.mozilla.org/en-US/security/advisories/mfsa2022-11/
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) Time-of-check Time-of-use (TOCTOU) Race Condition
EUVDB-ID: #VU61104
Risk: Medium
CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2022-26387
CWE-ID:
CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform spoofing attack.
The vulnerability exists due to a race condition when verifying signatures during Firefox add-on installation. A remote attacker can replace the underlying add-on file while the user was confirming the prompt and install a malicious add-on on the system.
Install updates from vendor's website.
Vulnerable software versionsMozilla Firefox: 90.0 - 97.0.2
Firefox ESR: 91.0 - 91.6.1
External linkshttp://www.mozilla.org/en-US/security/advisories/mfsa2022-10/
http://www.mozilla.org/en-US/security/advisories/mfsa2022-11/
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) Use-after-free
EUVDB-ID: #VU61105
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-2022-26381
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 processing HTML content A remote attacker can trigger a use-after-free by forcing a text reflow in an SVG object 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 versionsMozilla Firefox: 90.0 - 97.0.2
Firefox ESR: 91.0 - 91.6.1
External linkshttp://www.mozilla.org/en-US/security/advisories/mfsa2022-10/
http://www.mozilla.org/en-US/security/advisories/mfsa2022-11/
http://www.zerodayinitiative.com/advisories/ZDI-22-502/
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) Information disclosure
EUVDB-ID: #VU61106
Risk: Low
CVSSv3.1: 3.8 [CVSS:3.1/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-2022-26382
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 an error in the Autofill tooltips implementation when the text is rendered using page fonts. A remote attacker can obtain potentially sensitive information via a side-channel attack.
Install updates from vendor's website.
Vulnerable software versionsMozilla Firefox: 92.0 - 97.0.2
External linkshttp://www.mozilla.org/en-US/security/advisories/mfsa2022-10/
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) Use-after-free
EUVDB-ID: #VU61107
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-2022-26385
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 during thread shutdown. A remote attacker can force the user to close the thread, 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 versionsMozilla Firefox: 92.0 - 97.0.2
External linkshttp://www.mozilla.org/en-US/security/advisories/mfsa2022-10/
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) Buffer overflow
EUVDB-ID: #VU61108
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-2022-0843
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 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.
MitigationInstall updates from vendor's website.
Vulnerable software versionsMozilla Firefox: 92.0 - 97.0.2
External linkshttp://www.mozilla.org/en-US/security/advisories/mfsa2022-10/
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) Improper access control
EUVDB-ID: #VU61109
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-2022-26386
CWE-ID:
CWE-284 - Improper Access Control
Exploit availability: No
DescriptionThe vulnerability allows a local user to gain access to victim's downloads.
The vulnerability exists due to browser stores files in the /tmp folder, which is accessible by all local users. A local user can read files from this folder and gain access to potentially sensitive information.
Note, the vulnerability affects Firefox ESR on macOS and Linux.
Install updates from vendor's website.
Vulnerable software versionsFirefox ESR: 91.0 - 91.6.1
External linkshttp://www.mozilla.org/en-US/security/advisories/mfsa2022-11/
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.
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.
