Mozilla Thunderbird up to 91.4 pkcs7 denial of service

CVSS Meta Temp Score
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CTI Interest Score
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4.1$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in Mozilla Thunderbird up to 91.4. Affected by this issue is some unknown functionality of the component pkcs7 Handler. Executing a manipulation can lead to denial of service. This vulnerability appears as CVE-2022-22747. The attack may be performed from remote. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability has been found in Mozilla Thunderbird up to 91.4 (Mail Client Software) and classified as problematic. This vulnerability affects some unknown functionality of the component pkcs7 Handler. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability.

The weakness was presented 01/11/2022 by Tavis Ormandy as Bug 1735028 as confirmed advisory (Website). The advisory is shared for download at bugzilla.mozilla.org. The advisory contains:

After accepting an untrusted certificate, handling an empty pkcs7 sequence as part of the certificate data could have lead to a crash. This crash is believed to be unexploitable.
This vulnerability was named CVE-2022-22747. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1499.

The vulnerability scanner Nessus provides a plugin with the ID 249205 (EulerOS 2.0 SP13 : nss (EulerOS-SA-2025-1982)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 91.5 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 (249205). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Denial of service
CWE: CWE-404
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: 249205
Nessus Name: EulerOS 2.0 SP13 : nss (EulerOS-SA-2025-1982)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: Thunderbird 91.5

Timelineinfo

01/07/2022 🔍
01/11/2022 +4 days 🔍
01/11/2022 +0 days 🔍
09/29/2022 +261 days 🔍
08/14/2025 +1050 days 🔍

Sourcesinfo

Vendor: mozilla.org

Advisory: Bug 1735028
Researcher: Tavis Ormandy
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2022-22747 (🔍)
GCVE (CVE): GCVE-0-2022-22747
GCVE (VulDB): GCVE-100-209848

Entryinfo

Created: 09/29/2022 15:42
Updated: 08/14/2025 02:09
Changes: 09/29/2022 15:42 (17), 09/29/2022 15:45 (29), 10/25/2022 17:40 (1), 08/14/2025 02:09 (16)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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