Mozilla Firefox up to 64 Proxy Auto-Config PAC File 7pk security

CVSS Meta Temp Score
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CTI Interest Score
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5.9$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in Mozilla Firefox up to 64. Affected by this issue is some unknown functionality of the component Proxy Auto-Config. Such manipulation as part of PAC File leads to 7pk security. This vulnerability is listed as CVE-2018-18506. The attack may be performed from remote. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Mozilla Firefox up to 64 (Web Browser). Affected by this issue is some unknown functionality of the component Proxy Auto-Config. The manipulation as part of a PAC File leads to a 7pk security vulnerability. Using CWE to declare the problem leads to CWE-254. Impacted is confidentiality, integrity, and availability. CVE summarizes:

When proxy auto-detection is enabled, if a web server serves a Proxy Auto-Configuration (PAC) file or if a PAC file is loaded locally, this PAC file can specify that requests to the localhost are to be sent through the proxy to another server. This behavior is disallowed by default when a proxy is manually configured, but when enabled could allow for attacks on services and tools that bind to the localhost for networked behavior if they are accessed through browsing. This vulnerability affects Firefox < 65.

The bug was discovered 01/29/2019. The weakness was presented 02/05/2019 by Markus Vervier (Nils) with X41 D-Sec GmbH as MFSA 2019-01 as confirmed security advisory (Website). The advisory is available at mozilla.org. This vulnerability is handled as CVE-2018-18506 since 10/19/2018. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1211 by the MITRE ATT&CK project.

The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 121507 (Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 18.10 : firefox vulnerabilities (USN-3874-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 197358 (Ubuntu Security Notification for Firefox Vulnerabilities (USN-3874-1)).

Upgrading to version 65 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (121507) and SecurityFocus (BID 106773†). See VDB-130532, VDB-130533, VDB-130534 and VDB-130535 for similar entries. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.1
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
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: 7pk security
CWE: CWE-254
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 121507
Nessus Name: Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 18.10 : firefox vulnerabilities (USN-3874-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: Firefox 65

Timelineinfo

10/19/2018 🔍
01/29/2019 +102 days 🔍
01/29/2019 +0 days 🔍
01/31/2019 +2 days 🔍
02/05/2019 +5 days 🔍
02/05/2019 +0 days 🔍
02/06/2019 +1 days 🔍
05/08/2020 +457 days 🔍

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: MFSA 2019-01
Researcher: Markus Vervier (Nils)
Organization: X41 D-Sec GmbH
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-18506 (🔍)
GCVE (CVE): GCVE-0-2018-18506
GCVE (VulDB): GCVE-100-130538
SecurityFocus: 106773 - Mozilla Firefox MFSA2019-01 Multiple Security Vulnerabilities

See also: 🔍

Entryinfo

Created: 02/06/2019 13:33
Updated: 05/08/2020 11:54
Changes: 02/06/2019 13:33 (70), 05/08/2020 11:54 (14)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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