// For flags

CVE-2015-7193

Mozilla: CORS preflight is bypassed when non-standard Content-Type headers are received (MFSA 2015-127)

Severity Score

9.1
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

Mozilla Firefox before 42.0 and Firefox ESR 38.x before 38.4 improperly follow the CORS cross-origin request algorithm for the POST method in situations involving an unspecified Content-Type header manipulation, which allows remote attackers to bypass the Same Origin Policy by leveraging the lack of a preflight-request step.

Mozilla Firefox en versiones anteriores a 42.0 y Firefox ESR 38.x en versiones anteriores a 38.4 sigue el algoritmo de petición CORS cross-origin indebidamente para el método POST en situaciones que involucran una manipulación de la cabecera Content-Type no especificada, lo que permite a atacantes remotos eludir la Same Origin Policy mediante el aprovechamiento de la falta del paso preflight-request.

Christian Holler, David Major, Jesse Ruderman, Tyson Smith, Boris Zbarsky, Randell Jesup, Olli Pettay, Karl Tomlinson, Jeff Walden, and Gary Kwong discovered multiple memory safety issues in Thunderbird. If a user were tricked in to opening a specially crafted message, an attacker could potentially exploit these to cause a denial of service via application crash, or execute arbitrary code with the privileges of the user invoking Thunderbird. Tyson Smith and David Keeler discovered a use-after-poison and buffer overflow in NSS. An attacker could potentially exploit these to cause a denial of service via application crash, or execute arbitrary code with the privileges of the user invoking Thunderbird. Various other issues were also addressed.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial
Attack Vector
Network
Attack Complexity
High
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2015-09-16 CVE Reserved
  • 2015-11-04 CVE Published
  • 2024-08-06 CVE Updated
  • 2024-12-17 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-254: 7PK - Security Features
CAPEC
References (22)
URL Date SRC
URL Date SRC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Mozilla
Search vendor "Mozilla"
Firefox Esr
Search vendor "Mozilla" for product "Firefox Esr"
38.0
Search vendor "Mozilla" for product "Firefox Esr" and version "38.0"
-
Affected
Mozilla
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Firefox Esr
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38.0.1
Search vendor "Mozilla" for product "Firefox Esr" and version "38.0.1"
-
Affected
Mozilla
Search vendor "Mozilla"
Firefox Esr
Search vendor "Mozilla" for product "Firefox Esr"
38.0.5
Search vendor "Mozilla" for product "Firefox Esr" and version "38.0.5"
-
Affected
Mozilla
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Firefox Esr
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38.1.0
Search vendor "Mozilla" for product "Firefox Esr" and version "38.1.0"
-
Affected
Mozilla
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Firefox Esr
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38.1.1
Search vendor "Mozilla" for product "Firefox Esr" and version "38.1.1"
-
Affected
Mozilla
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Firefox Esr
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38.2.0
Search vendor "Mozilla" for product "Firefox Esr" and version "38.2.0"
-
Affected
Mozilla
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Firefox Esr
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38.2.1
Search vendor "Mozilla" for product "Firefox Esr" and version "38.2.1"
-
Affected
Mozilla
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Firefox Esr
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38.3.0
Search vendor "Mozilla" for product "Firefox Esr" and version "38.3.0"
-
Affected
Mozilla
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Firefox
Search vendor "Mozilla" for product "Firefox"
<= 41.0.2
Search vendor "Mozilla" for product "Firefox" and version " <= 41.0.2"
-
Affected