Mozilla Firefox 43 Cookie Name Control Character information disclosure

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.4$0-$5k0.00

Summaryinfo

A vulnerability was found in Mozilla Firefox 43. It has been classified as critical. This affects an unknown part of the component Cookie Name Handler. The manipulation as part of Control Character leads to information disclosure. This vulnerability is uniquely identified as CVE-2016-1939. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as very critical, has been found in Mozilla Firefox 43 (Web Browser). This issue affects an unknown code block of the component Cookie Name Handler. The manipulation as part of a Control Character leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality, integrity, and availability.

The weakness was disclosed 01/26/2016 by musicDespiteEverything and Nicholas Hurley as MFSA2016-04 as confirmed security advisory (Website). It is possible to read the advisory at mozilla.org. The identification of this vulnerability is CVE-2016-1939 since 01/20/2016. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/06/2022). The attack technique deployed by this issue is T1592 according to MITRE ATT&CK. The advisory points out:

Security researcher musicDespiteEverything previously reported an issue where illegal control characters were stored in as cookie values in violation of RFC6265. While fixing this issue, Mozilla developer Nicholas Hurley realized that the same issue applied to the names of cookies. These characters have now been disallowed in cookie names. This issue could result in incorrect cookie handling by web servers.

The vulnerability scanner Nessus provides a plugin with the ID 88512 (FreeBSD : mozilla -- multiple vulnerabilities (4f00dac0-1e18-4481-95af-7aaad63fd303)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 168483 (OpenSuSE Security Update for Mozilla Firefox (openSUSE-SU-2016:0306-1)).

Upgrading to version 44 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 (88512) and Vulnerability Center (SBV-56220†). bugzilla.mozilla.org is providing further details. The entries VDB-79808, VDB-80696, VDB-80694 and VDB-80693 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: 7.7
VulDB Meta Temp Score: 7.4

VulDB Base Score: 10.0
VulDB Temp Score: 9.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
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: 88512
Nessus Name: FreeBSD : mozilla -- multiple vulnerabilities (4f00dac0-1e18-4481-95af-7aaad63fd303)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 803852
OpenVAS Name: Mozilla Firefox Multiple Vulnerabilities - Jan16 (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: 🔍

Upgrade: Firefox 44

Timelineinfo

01/20/2016 🔍
01/25/2016 +5 days 🔍
01/26/2016 +0 days 🔍
01/26/2016 +0 days 🔍
01/26/2016 +0 days 🔍
01/27/2016 +0 days 🔍
01/31/2016 +4 days 🔍
02/01/2016 +1 days 🔍
07/06/2022 +2346 days 🔍

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: MFSA2016-04
Researcher: musicDespiteEverything, Nicholas Hurley
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-1939 (🔍)
GCVE (CVE): GCVE-0-2016-1939
GCVE (VulDB): GCVE-100-80687
SecurityTracker: 1034825
Vulnerability Center: 56220 - Mozilla Firefox <44 Remote Cookie Injection Vulnerability via Illegal Control Characters, Medium

Misc.: 🔍
See also: 🔍

Entryinfo

Created: 01/27/2016 13:43
Updated: 07/06/2022 12:08
Changes: 01/27/2016 13:43 (71), 07/23/2018 07:53 (15), 07/06/2022 12:08 (5)
Complete: 🔍
Cache ID: 216:DE2:103

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