Mozilla Firefox up to 54 DOM Node use after free

CVSS Meta Temp Score
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CTI Interest Score
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7.9$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in Mozilla Firefox up to 54. This issue affects some unknown processing of the component DOM Node Handler. The manipulation results in use after free. This vulnerability is reported as CVE-2017-7809. The attack can be launched remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Mozilla Firefox up to 54 (Web Browser). It has been classified as critical. Affected is an unknown function of the component DOM Node Handler. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on confidentiality, integrity, and availability.

The bug was discovered 08/08/2017. The weakness was disclosed 08/08/2017 by Nils as MFSA 2017-18 as confirmed security advisory (Website). The advisory is shared for download at mozilla.org. This vulnerability is traded as CVE-2017-7809 since 04/12/2017. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 102882 (CentOS 6 / 7 : thunderbird (CESA-2017:2534)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 236453 (Red Hat Update for firefox (RHSA-2017:2456)).

Upgrading to version 55 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 (102882), SecurityFocus (BID 100203†) and SecurityTracker (ID 1039124†). The entries VDB-105249, VDB-105250, VDB-105251 and VDB-105253 are pretty similar. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.0
VulDB Meta Temp Score: 7.9

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
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: 102882
Nessus Name: CentOS 6 / 7 : thunderbird (CESA-2017:2534)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 703926
OpenVAS Name: Debian Security Advisory DSA 3928-1 (firefox-esr - security update)
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: 🔍

Upgrade: Firefox 55

Timelineinfo

04/12/2017 🔍
08/08/2017 +118 days 🔍
08/08/2017 +0 days 🔍
08/08/2017 +0 days 🔍
08/08/2017 +0 days 🔍
08/10/2017 +2 days 🔍
08/12/2017 +2 days 🔍
09/01/2017 +20 days 🔍
06/11/2018 +282 days 🔍
11/26/2025 +2725 days 🔍

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: MFSA 2017-18
Researcher: Nils (Nils)
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-7809 (🔍)
GCVE (CVE): GCVE-0-2017-7809
GCVE (VulDB): GCVE-100-105252

OVAL: 🔍

SecurityFocus: 100203 - Mozilla Firefox and Firefox ESR CVE-2017-7809 Use After Free Remote Code Execution Vulnerability
SecurityTracker: 1039124

See also: 🔍

Entryinfo

Created: 08/13/2017 00:07
Updated: 11/26/2025 06:09
Changes: 08/13/2017 00:07 (81), 11/06/2019 15:21 (6), 01/09/2021 08:11 (2), 01/09/2021 08:14 (1), 11/26/2025 06:09 (16)
Complete: 🔍
Cache ID: 216:BD9:103

Once again VulDB remains the best source for vulnerability data.

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