Mozilla Firefox up to 40 CORS Preflight Protection 7pk security

CVSS Meta Temp Score
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CTI Interest Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Mozilla Firefox up to 40. This vulnerability affects unknown code of the component CORS Preflight Protection Handler. This manipulation causes 7pk security. This vulnerability is tracked as CVE-2015-4520. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Mozilla Firefox up to 40 (Web Browser). It has been declared as critical. Affected by this vulnerability is an unknown functionality of the component CORS Preflight Protection Handler. The manipulation with an unknown input leads to a 7pk security vulnerability. The CWE definition for the vulnerability is CWE-254. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Mozilla Firefox before 41.0 and Firefox ESR 38.x before 38.3 allow remote attackers to bypass CORS preflight protection mechanisms by leveraging (1) duplicate cache-key generation or (2) retrieval of a value from an incorrect HTTP Access-Control-* response header.

The weakness was disclosed 09/24/2015 by Christian Holler (Website). The advisory is shared at bugzilla.mozilla.org. This vulnerability is known as CVE-2015-4520 since 06/10/2015. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1211 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 86514 (CentOS 5 / 6 / 7 : firefox (CESA-2015:1834)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 168108 (OpenSuSE Security Update for MozillaFirefox (openSUSE-SU-2015:1658-1)).

Upgrading to version 41.0 eliminates this vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 20821.

The vulnerability is also documented in the databases at X-Force (106646), Tenable (86514), SecurityFocus (BID 76816†) and Vulnerability Center (SBV-52943†). The entries VDB-78020, VDB-78021, VDB-78022 and VDB-78023 are pretty similar. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.4

VulDB Base Score: 7.3
VulDB Temp Score: 6.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: 7pk security
CWE: CWE-254
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 86514
Nessus Name: CentOS 5 / 6 / 7 : firefox (CESA-2015:1834)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 703365
OpenVAS Name: Debian Security Advisory DSA 3365-1 (iceweasel - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Firefox 41.0
TippingPoint: 🔍

Timelineinfo

06/10/2015 🔍
09/22/2015 +104 days 🔍
09/22/2015 +0 days 🔍
09/24/2015 +2 days 🔍
09/24/2015 +0 days 🔍
09/24/2015 +0 days 🔍
09/25/2015 +1 days 🔍
10/22/2024 +3315 days 🔍

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: RHSA-2015:1834
Researcher: Christian Holler
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-4520 (🔍)
GCVE (CVE): GCVE-0-2015-4520
GCVE (VulDB): GCVE-100-78037

OVAL: 🔍

X-Force: 106646 - Mozilla Firefox CORS securitty bypass
SecurityFocus: 76816 - Mozilla Firefox Multiple Security Vulnerabilities
SecurityTracker: 1033640
Vulnerability Center: 52943 - Mozilla Firefox before 41 Unspecified Remote Vulnerability when Handling CORS Preflight Request Headers, Medium

See also: 🔍

Entryinfo

Created: 09/25/2015 17:58
Updated: 10/22/2024 23:08
Changes: 09/25/2015 17:58 (64), 01/03/2018 09:54 (13), 06/19/2022 03:23 (4), 06/19/2022 03:31 (1), 06/19/2022 03:39 (2), 10/22/2024 23:08 (15)
Complete: 🔍
Cache ID: 216:485:103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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