PT-2019-4546 · Mozilla+2 · Firefox+2

Vinothkumar Nagasayanan + 1 · Published 2019-03-19 · Updated 2024-12-12 · CVE-2019-9803

Positive Technologies (AI Summary)

CVSS v3.1

7.4

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 66

Description The issue is related to the Upgrade-Insecure-Requests (UIR) specification and Content Security Policy (CSP) in Firefox. When UIR is enabled through CSP, Firefox should upgrade navigation to a same-origin URL to HTTPS. However, in some cases, Firefox incorrectly navigates to an HTTP URL instead of performing the security upgrade, potentially allowing man-in-the-middle attacks on linked resources. This could allow a remote attacker to access and compromise confidential data.

Recommendations For versions prior to 66, update to version 66 or later to resolve the issue. As a temporary workaround, consider disabling the UIR feature through CSP until a patch is available. Restrict access to sensitive data and resources to minimize the risk of exploitation.

Fix

Origin Validation Error

Weakness Enumeration

CWE-346

Related Identifiers

ALT-PU-2019-1561

ALT-PU-2019-2324

ALT-PU-2019-2486

BDU:2020-00592

CVE-2019-9803

OPENSUSE-SU-2024:10600-1

OPENSUSE-SU-2024:14572-1

USN-3918-1

USN-3918-2

USN-3918-3

USN-3918-4

Affected Products

Alt Linux

Firefox

Ubuntu

References · 1903

• https://osv.dev/vulnerability/CVE-2019-9803 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2024:14572-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-9792 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-9791 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-9807 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-9788 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-3918-2 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-3918-3 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2019-9803 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-3918-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-9805 · Vendor Advisory
• https://mozilla.org/en-US/security/advisories/mfsa2019-07/#CVE-2019-9803 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-9789 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-9806 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-9803 · Security Note