Mozilla Firefox up to 75.x memory corruption

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.9$0-$5k0.00

Summaryinfo

A vulnerability was found in Mozilla Firefox up to 75.x. It has been classified as critical. The affected element is an unknown function. Performing a manipulation results in memory corruption. This vulnerability is identified as CVE-2020-12396. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical has been found in Mozilla Firefox up to 75.x (Web Browser). This affects an unknown code block. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Mozilla developers and community members reported memory safety bugs present in Firefox 75. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 76.

The weakness was released 05/26/2020. This vulnerability is uniquely identified as CVE-2020-12396 since 04/28/2020. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. 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 08/10/2025).

The vulnerability scanner Nessus provides a plugin with the ID 247454 (Linux Distros Unpatched Vulnerability : CVE-2020-12396), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 76.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (247454). Entry connected to this vulnerability is available at VDB-155599. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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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: Memory corruption
CWE: 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: 247454
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2020-12396

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Firefox 76.0

Timelineinfo

04/28/2020 🔍
05/26/2020 +28 days 🔍
05/27/2020 +1 days 🔍
08/10/2025 +1901 days 🔍

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Status: Confirmed

CVE: CVE-2020-12396 (🔍)
GCVE (CVE): GCVE-0-2020-12396
GCVE (VulDB): GCVE-100-155601
See also: 🔍

Entryinfo

Created: 05/27/2020 08:26
Updated: 08/10/2025 21:46
Changes: 05/27/2020 08:26 (38), 05/27/2020 08:31 (18), 08/10/2025 21:46 (20)
Complete: 🔍
Cache ID: 216::103

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

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