Mozilla Thunderbird up to 91.7 WebAuthN Extension out-of-bounds write

CVSS Meta Temp Score
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CTI Interest Score
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7.4$5k-$25k0.00

Summaryinfo

A vulnerability was found in Mozilla Thunderbird up to 91.7. It has been rated as critical. Affected is an unknown function of the component WebAuthN Extension Handler. This manipulation causes out-of-bounds write. This vulnerability appears as CVE-2022-28281. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Mozilla Thunderbird up to 91.7 (Mail Client Software). It has been declared as critical. Affected by this vulnerability is an unknown function of the component WebAuthN Extension Handler. 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:

If a compromised content process sent an unexpected number of WebAuthN Extensions in a Register command to the parent process, an out of bounds write would have occurred leading to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 91.8, Firefox < 99, and Firefox ESR < 91.8.

The weakness was presented 04/05/2022 by Axel Souchet as Bug 1755621 as confirmed advisory (Website). It is possible to read the advisory at bugzilla.mozilla.org. The advisory contains:

If a compromised content process sent an unexpected number of WebAuthN Extensions in a Register command to the parent process, an out of bounds write would have occurred leading to memory corruption and a potentially exploitable crash.
This vulnerability is known as CVE-2022-28281. 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 $5k-$25k at the moment (estimation calculated on 04/15/2025).

The vulnerability scanner Nessus provides a plugin with the ID 208650 (CentOS 7 : thunderbird (RHSA-2022:1302)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 91.8 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 (208650). Statistical analysis made it clear that VulDB provides the best quality 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: 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

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

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: 208650
Nessus Name: CentOS 7 : thunderbird (RHSA-2022:1302)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: Thunderbird 91.8

Timelineinfo

03/31/2022 🔍
04/05/2022 +5 days 🔍
04/05/2022 +0 days 🔍
09/30/2022 +178 days 🔍
04/29/2025 +942 days 🔍

Sourcesinfo

Vendor: mozilla.org

Advisory: Bug 1755621
Researcher: Axel Souchet
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2022-28281 (🔍)
GCVE (CVE): GCVE-0-2022-28281
GCVE (VulDB): GCVE-100-209923

Entryinfo

Created: 09/30/2022 09:13
Updated: 04/29/2025 13:20
Changes: 09/30/2022 09:13 (3), 09/30/2022 09:14 (15), 09/30/2022 09:17 (28), 10/26/2022 11:29 (1), 10/10/2024 02:22 (16), 04/15/2025 23:53 (13), 04/29/2025 13:20 (3)
Complete: 🔍
Cache ID: 216::103

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

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