VDB-180220 · CVE-2021-29969 · mfsa2021-30

Mozilla Thunderbird up to 78.11 IMAP Server injection

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.8	$0-$5k	0.00

Summaryinfo

A vulnerability described as critical has been identified in Mozilla Thunderbird up to 78.11. The impacted element is an unknown function of the component IMAP Server Handler. Executing a manipulation can lead to injection. This vulnerability is registered as CVE-2021-29969. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in Mozilla Thunderbird up to 78.11 (Mail Client Software) and classified as critical. This vulnerability affects an unknown code block of the component IMAP Server Handler. The manipulation with an unknown input leads to a injection vulnerability. The CWE definition for the vulnerability is CWE-74. The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was published 08/06/2021 as mfsa2021-30. The advisory is shared for download at mozilla.org. This vulnerability was named CVE-2021-29969. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 10/13/2024). The MITRE ATT&CK project declares the attack technique as T1055.

The vulnerability scanner Nessus provides a plugin with the ID 208618 (CentOS 7 : thunderbird (RHSA-2021:2881)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 78.12 eliminates this vulnerability. The upgrade is hosted for download at mozilla.org.

The vulnerability is also documented in the vulnerability database at Tenable (208618). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Mail Client Software

Vendor

Mozilla

Name

Thunderbird

Version

License

open-source

Website

Vendor: https://www.mozilla.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.0
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.0
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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

Exploitinginfo

Class: Injection
CWE: CWE-74 / CWE-707 / CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 208618
Nessus Name: CentOS 7 : thunderbird (RHSA-2021:2881)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Thunderbird 78.12

Timelineinfo

04/01/2021 🔍
08/06/2021 +127 days 🔍
08/06/2021 +0 days 🔍
05/03/2025 +1366 days 🔍

Sourcesinfo

Vendor: mozilla.org

Advisory: mfsa2021-30
Status: Confirmed

CVE: CVE-2021-29969 (🔍)
GCVE (CVE): GCVE-0-2021-29969
GCVE (VulDB): GCVE-100-180220

Entryinfo

Created: 08/06/2021 10:40
Updated: 05/03/2025 14:09
Changes: 08/06/2021 10:40 (41), 08/10/2021 09:34 (2), 10/13/2024 08:50 (16), 05/03/2025 14:09 (3)
Complete: 🔍
Cache ID: 216::103