PT-2021-15634 · Mozilla+1 · Firefox For Android+1

Fatal0 · Published 2021-02-26 · Updated 2024-12-12 · CVE-2021-23977

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions: Firefox for Android versions prior to 86

Description: The issue is a time-of-check-time-of-use vulnerability that allows a malicious application to read sensitive data from application directories. This problem is specific to Firefox for Android, with other operating systems being unaffected.

Recommendations: For Firefox for Android versions prior to 86, update to version 86 or later to resolve the issue. As a temporary workaround, consider restricting access to sensitive application directories until the update is applied.

Fix

Time Of Check To Time Of Use

Weakness Enumeration

CWE-367

Related Identifiers

ALT-PU-2021-1428

ALT-PU-2021-3368

ALT-PU-2022-1782

CVE-2021-23977

OPENSUSE-SU-2024:10600-1

OPENSUSE-SU-2024:14572-1

Affected Products

Alt Linux

Firefox For Android

References · 1873

• https://cve.org/CVERecord?id=CVE-2021-23977 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-23977 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-23977 · Security Note
• https://mozilla.org/security/advisories/mfsa2021-07 · Vendor Advisory
• https://mozilla.org/en-US/security/advisories/mfsa2021-07/#CVE-2021-23977 · Vendor Advisory
• https://security.gentoo.org/glsa/202104-10 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-23977 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2024:10600-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-23977 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2024:14572-1 · Vendor Advisory
• https://bugzilla.mozilla.org/show_bug.cgi?id=1684761 · Vendor Advisory
• https://suse.com/security/cve/CVE-2024-2615 · Note
• https://suse.com/security/cve/CVE-2022-38477 · Note
• https://suse.com/security/cve/CVE-2022-28282 · Note
• https://suse.com/security/cve/CVE-2020-35111 · Note