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mozillaMozilla FoundationMFSA2015-37
HistoryMar 31, 2015 - 12:00 a.m.

CORS requests should not follow 30x redirections after preflight — Mozilla

2015-03-3100:00:00
Mozilla Foundation
www.mozilla.org
28

CVSS2

6.8

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

EPSS

0.003

Percentile

71.1%

Mozilla developer Christoph Kerschbaumer discovered an issue while investigating Mozilla Foundation Security Advisory 2015-03, previously reported by security researcher Muneaki Nishimura. This flaw was that a cross-origin resource sharing (CORS) request should not follow 30x redirections after preflight according to the specification. This only affects sendBeacon() requests but could allow for a potential Cross-site request forgery (XSRF) attack from malicious websites.

Affected configurations

Vulners
Node
mozillafirefoxRange<37
OR
mozillafirefox_esrRange<31.6
OR
mozillafirefox_osRange<2.2
OR
mozillaseamonkeyRange<2.35
OR
mozillathunderbirdRange<31.6

CVSS2

6.8

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

EPSS

0.003

Percentile

71.1%