Mozilla Firefox 43 GIF Image numeric error

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability classified as very critical has been found in Mozilla Firefox 43 (Web Browser). This affects an unknown part of the component GIF Image Handler. The manipulation with an unknown input leads to a numeric error vulnerability. CWE is classifying the issue as CWE-189. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was published 01/26/2016 by Gustavo Grieco as MFSA2016-02 as confirmed security advisory (Website). The advisory is shared at This vulnerability is uniquely identified as CVE-2016-1933 since 01/19/2016. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/06/2022). The advisory points out:

Security researcher Gustavo Grieco reported an out of memory crash when loading maliciously crafted GIF format images. Investigation of the issue determined that the root cause was an error in image parsing code during deinterlacing, leading to a potential integer overflow.

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 vulnerability database at Tenable (88512). Further details are available at Similar entries are available at 79808, 80696, 80694 and 80693.







CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 8.3
VulDB Meta Temp Score: 8.0

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

NVD Base Score: 6.5
NVD Vector: 🔍



VulDB Base Score: 🔍
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Class: Numeric error
CWE: CWE-189
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


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: 🔍
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Recommended: Upgrade
Status: 🔍

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

Upgrade: Firefox 44


01/19/2016 🔍
01/25/2016 +6 days 🔍
01/25/2016 +0 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 🔍



Advisory: MFSA2016-02
Researcher: Gustavo Grieco
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-1933 (🔍)
SecurityTracker: 1034825
Vulnerability Center: 56219 - Mozilla Firefox <44 Remote DoS via Crafted GIF, Medium
SecurityFocus: 81956 - Mozilla Firefox CVE-2016-1933 Denial of Service Vulnerability

Misc.: 🔍
See also: 🔍


Created: 01/27/2016 01:43 PM
Updated: 07/06/2022 11:54 AM
Changes: 01/27/2016 01:43 PM (72), 07/23/2018 07:52 AM (19), 07/06/2022 11:54 AM (4)
Complete: 🔍


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