PT-2021-2606 · Mozilla+7 · Firefox+9
Rob Wu
·
Published
2021-01-26
·
Updated
2024-12-12
·
CVE-2021-23953
CVSS v2.0
5.0
Medium
| Vector | AV:N/AC:L/Au:N/C:P/I:N/A:N |
Name of the Vulnerable Software and Affected Versions
Firefox versions prior to 85
Firefox ESR versions prior to 78.7
Thunderbird versions prior to 78.7
Description
The issue is related to the inclusion of features from an untrusted controlled area, allowing a remote attacker to gain unauthorized access to protected information using a specially crafted malicious PDF file. If a user clicks on a specifically crafted PDF, the PDF reader could be confused into leaking cross-origin information when said information is served as chunked data.
Recommendations
For Firefox versions prior to 85, update to version 85 or later to resolve the issue.
For Firefox ESR versions prior to 78.7, update to version 78.7 or later to resolve the issue.
For Thunderbird versions prior to 78.7, update to version 78.7 or later to resolve the issue.
As a temporary workaround, consider avoiding the use of the PDF reader in the affected browser versions until a patch is available.
Exploit
Fix
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Astra Linux
Centos
Firefox
Firefox Esr
Linuxmint
Red Hat
Suse
Thunderbird
Ubuntu