Vulnerability Monitor

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CVE-2019-9803

The Upgrade-Insecure-Requests (UIR) specification states that if UIR is enabled through Content Security Policy (CSP), navigation to a same-origin URL must be upgraded to HTTPS. Firefox will incorrectly navigate to an HTTP URL rather than perform the security upgrade requested by the CSP in some circumstances, allowing for potential man-in-the-middle attacks on the linked resources. This vulnerability affects Firefox < 66.

Published

2019-04-26T17:29:03.257

Last Modified

2024-11-21T04:52:20.473

Status

Modified

Source

[email protected]

Severity

CVSSv3.0: 7.4 (HIGH)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:P/I:P/A:N

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: NONE

Exploitability Score

8.6

Impact Score

4.9

Weaknesses

Type: Primary
CWE-346

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	mozilla	firefox	< 66.0	Yes

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1437009 Issue Tracking, Vendor Advisory ([email protected])
https://bugzilla.mozilla.org/show_bug.cgi?id=1515863 Issue Tracking, Permissions Required, Vendor Advisory ([email protected])
https://w3c.github.io/webappsec-upgrade-insecure-requests/ Third Party Advisory ([email protected])
https://www.mozilla.org/security/advisories/mfsa2019-07/ Vendor Advisory ([email protected])
https://bugzilla.mozilla.org/show_bug.cgi?id=1437009 Issue Tracking, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.mozilla.org/show_bug.cgi?id=1515863 Issue Tracking, Permissions Required, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://w3c.github.io/webappsec-upgrade-insecure-requests/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.mozilla.org/security/advisories/mfsa2019-07/ Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)