Mozilla Firefox 25.0.1 EV Certificate Validation cryptographic issue

CVSS Meta Temp Score
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CTI Interest Score
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4.8$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Mozilla Firefox 25.0.1. This impacts an unknown function of the component EV Certificate Validation Handler. This manipulation causes cryptographic issue. The identification of this vulnerability is CVE-2013-6673. It is possible to initiate the attack remotely. Furthermore, there is an exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in Mozilla Firefox 25.0.1 (Web Browser). Affected by this vulnerability is an unknown code of the component EV Certificate Validation Handler. The manipulation with an unknown input leads to a cryptographic issue vulnerability. The CWE definition for the vulnerability is CWE-310. As an impact it is known to affect confidentiality, and integrity. The summary by CVE is:

Mozilla Firefox before 26.0, Firefox ESR 24.x before 24.2, Thunderbird before 24.2, and SeaMonkey before 2.23 do not recognize a user's removal of trust from an EV X.509 certificate, which makes it easier for man-in-the-middle attackers to spoof SSL servers in opportunistic circumstances via a valid certificate that is unacceptable to the user.

The weakness was shared 09/17/2013 by Sijie Xia as MFSA2013-113 as confirmed advisory (Website). The advisory is shared at mozilla.org. The vendor cooperated in the coordination of the public release. This vulnerability is known as CVE-2013-6673 since 11/05/2013. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details are unknown but a public exploit is available. MITRE ATT&CK project uses the attack technique T1600 for this issue.

After immediately, there has been an exploit disclosed. It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 71365 (Fedora 19 : firefox-26.0-2.fc19 / xulrunner-26.0-1.fc19 (2013-23127)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 195893 (Ubuntu Security Notification for Firefox Vulnerabilities (USN-2052-1)).

Upgrading to version 26 eliminates this vulnerability. A possible mitigation has been published 3 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (89599), Tenable (71365), SecurityFocus (BID 64213†), OSVDB (100806†) and Vulnerability Center (SBV-42587†). The entries VDB-11447, VDB-11451, VDB-11452 and VDB-11460 are related to this item. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.1
VulDB Meta Temp Score: 4.8

VulDB Base Score: 4.2
VulDB Temp Score: 3.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.9
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Cryptographic issue
CWE: CWE-310
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 71365
Nessus Name: Fedora 19 : firefox-26.0-2.fc19 / xulrunner-26.0-1.fc19 (2013-23127)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 803465
OpenVAS Name: Mozilla Firefox ESR Multiple Vulnerabilities-01 Dec13 (Windows)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Exploit Delay Time: 🔍

Upgrade: Firefox 26

Timelineinfo

09/17/2013 🔍
09/17/2013 +0 days 🔍
11/05/2013 +49 days 🔍
12/10/2013 +35 days 🔍
12/10/2013 +0 days 🔍
12/11/2013 +1 days 🔍
12/12/2013 +1 days 🔍
12/16/2013 +4 days 🔍
11/25/2025 +4362 days 🔍

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: MFSA2013-113
Researcher: Sijie Xia
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2013-6673 (🔍)
GCVE (CVE): GCVE-0-2013-6673
GCVE (VulDB): GCVE-100-11449

OVAL: 🔍
IAVM: 🔍

X-Force: 89599
SecurityFocus: 64213
OSVDB: 100806
SecurityTracker: 1029470
Vulnerability Center: 42587 - Mozilla Firefox, Firefox ESR, Thunderbird and SeaMonkey Remote man-in-the-middle Attack via Valid Certificate, Medium

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 12/12/2013 08:58
Updated: 11/25/2025 19:51
Changes: 12/12/2013 08:58 (84), 01/31/2018 09:55 (2), 06/04/2021 06:34 (3), 06/04/2021 06:45 (11), 06/04/2021 06:54 (1), 11/25/2025 19:51 (19)
Complete: 🔍
Cache ID: 216:FED:103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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