Multiple vulnerabilities in Mozilla Firefox for Android



Published: 2021-02-23
Risk Low
Patch available YES
Number of vulnerabilities 2
CVE ID CVE-2021-23977
CVE-2021-23976
CWE ID CWE-367
CWE-264
Exploitation vector Local
Public exploit N/A
Vulnerable software
Subscribe
Firefox for Android
Mobile applications / Apps for mobile phones

Vendor Mozilla

Security Advisory

1) Race condition

Risk: Low

CVSSv3: 4.8 [CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2021-23977

CWE-ID: CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition

Exploit availability: No

Description

The vulnerability allows a malicious application to read sensitive information.

The vulnerability exists due to a race condition. A local application can read sensitive data from Firefox directories.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Firefox for Android: 80.1.2, 81.1.0, 81.1.3, 81.1.4, 81.1.5, 82.1.0, 82.1.1, 82.1.3, 83.0.0, 83.1.0, 84.1.0, 84.1.1, 84.1.2, 84.1.3, 85.1.0, 85.1.1, 85.1.2, 85.1.3

CPE External links

https://www.mozilla.org/en-US/security/advisories/mfsa2021-07/

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 open a a specially crafted app.

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) Security restrictions bypass

Risk: Low

CVSSv3: 3.9 [CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-23976

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

Exploit availability: No

Description

The vulnerability allows a local application to escalate privileges on the system.

When accepting a malicious intent from other installed apps, Firefox for Android accepted manifests from arbitrary file paths and allowed declaring webapp manifests for other origins. This could be used to gain fullscreen access for UI spoofing and could also lead to cross-origin attacks on targeted websites.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Firefox for Android: 80.1.2, 81.1.0, 81.1.3, 81.1.4, 81.1.5, 82.1.0, 82.1.1, 82.1.3, 83.0.0, 83.1.0, 84.1.0, 84.1.1, 84.1.2, 84.1.3, 85.1.0, 85.1.1, 85.1.2, 85.1.3

CPE External links

https://www.mozilla.org/en-US/security/advisories/mfsa2021-07/

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 open a a specially crafted app.

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.



###SIDEBAR###