Mozilla Firefox/Firefox ESR/Thunderbird on 32-bit out-of-bounds write

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 classified as critical has been found in Mozilla Firefox, Firefox ESR and Thunderbird on 32-bit. Affected by this vulnerability is an unknown functionality. This manipulation causes out-of-bounds write. This vulnerability appears as CVE-2020-6822. The attack may be initiated remotely. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Mozilla Firefox, Firefox ESR and Thunderbird on 32-bit (Web Browser) (version now known) and classified as critical. Affected by this vulnerability is some unknown processing. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. The CWE definition for the vulnerability is CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

On 32-bit builds, an out of bounds write could have occurred when processing an image larger than 4 GB in <code>GMPDecodeData</code>. It is possible that with enough effort this could have been exploited to run arbitrary code. This vulnerability affects Thunderbird < 68.7.0, Firefox ESR < 68.7, and Firefox < 75.

The weakness was presented 04/24/2020. This vulnerability is known as CVE-2020-6822 since 01/10/2020. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. 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 10/14/2024).

The vulnerability scanner Nessus provides a plugin with the ID 208586 (CentOS 7 : firefox (RHSA-2020:1420)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (208586). See VDB-154366 and VDB-154362 for similar entries. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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License

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.4

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

NVD Base Score: 8.8
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / 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: 208586
Nessus Name: CentOS 7 : firefox (RHSA-2020:1420)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/10/2020 🔍
04/24/2020 +105 days 🔍
04/25/2020 +1 days 🔍
05/06/2025 +1837 days 🔍

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: USN-4335-1
Status: Confirmed

CVE: CVE-2020-6822 (🔍)
GCVE (CVE): GCVE-0-2020-6822
GCVE (VulDB): GCVE-100-154363
See also: 🔍

Entryinfo

Created: 04/25/2020 17:01
Updated: 05/06/2025 13:12
Changes: 04/25/2020 17:01 (37), 04/25/2020 17:06 (18), 06/02/2024 17:17 (19), 06/02/2024 17:24 (1), 10/14/2024 22:30 (2), 05/06/2025 13:12 (5)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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