Multiple vulnerabilities in Firefox for Android
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2021-29953 CVE-2021-29952 |
| CWE-ID | CWE-79 CWE-362 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Firefox for Android Mobile applications / Apps for mobile phones |
| Vendor | Mozilla |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) Universal cross-site scripting
EUVDB-ID: #VU52900
Risk: High
CVSSv3.1: 8.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-29953
CWE-ID:
CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Exploit availability: No
DescriptionThe disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary JavaScript in the context of another domain.
Successful exploitation of this vulnerability may allow a remote attacker to compromise the affected system.
Install update from vendor's website.
Firefox for Android: 80.1.2 - 88.1.2
External linkshttp://www.mozilla.org/en-US/security/advisories/mfsa2021-20/
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 perform certain actions on the device.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Race condition
EUVDB-ID: #VU52899
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-2021-29952
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to a race condition in Web Render components. A remote attacker can create a specially crafted web page, trick the victim into opening it and execute arbitrary code on the system.
Install update from vendor's website.
Firefox for Android: 80.1.2 - 88.1.2
External linkshttp://www.mozilla.org/en-US/security/advisories/mfsa2021-20/
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 perform certain actions on the device.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
