Mozilla Thunderbird up to 60.5.0 SMIME Signature Digital Signature signature verification

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.
5.7$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in Mozilla Thunderbird up to 60.5.0. Affected is an unknown function of the component SMIME Signature Handler. Performing a manipulation as part of Digital Signature results in signature verification. This vulnerability was named CVE-2018-18509. The attack may be initiated remotely. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Mozilla Thunderbird up to 60.5.0 (Mail Client Software). It has been classified as critical. This affects some unknown processing of the component SMIME Signature Handler. The manipulation as part of a Digital Signature leads to a signature verification vulnerability. CWE is classifying the issue as CWE-347. The product does not verify, or incorrectly verifies, the cryptographic signature for data. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

A flaw during verification of certain S/MIME signatures causes emails to be shown in Thunderbird as having a valid digital signature, even if the shown message contents aren't covered by the signature. The flaw allows an attacker to reuse a valid S/MIME signature to craft an email message with arbitrary content. This vulnerability affects Thunderbird < 60.5.1.

The bug was discovered 02/14/2019. The weakness was presented 04/26/2019 by Guang Gong with Qihoo 360 (Website). The advisory is shared at seclists.org. This vulnerability is uniquely identified as CVE-2018-18509 since 10/19/2018. 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 vulnerability was handled as a non-public zero-day exploit for at least 71 days. During that time the estimated underground price was around $5k-$25k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 176588 (Debian Security Update for thunderbird (DSA 4392-1)).

Upgrading to version 60.5.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 106084†). See VDB-127833, VDB-127834, VDB-127835 and VDB-127836 for similar entries. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.8
VulDB Meta Temp Score: 5.7

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

NVD Base Score: 5.3
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Signature verification
CWE: CWE-347 / CWE-345
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Thunderbird 60.5.1

Timelineinfo

10/19/2018 🔍
12/04/2018 +46 days 🔍
02/14/2019 +72 days 🔍
04/26/2019 +71 days 🔍
04/27/2019 +1 days 🔍
09/07/2023 +1594 days 🔍

Sourcesinfo

Vendor: mozilla.org

Advisory: RHSA-2019:1144
Researcher: Guang Gong
Organization: Qihoo 360
Status: Confirmed

CVE: CVE-2018-18509 (🔍)
GCVE (CVE): GCVE-0-2018-18509
GCVE (VulDB): GCVE-100-134133
SecurityFocus: 106084 - Google Chrome Prior to 71.0.3578.80 Multiple Security Vulnerabilities

See also: 🔍

Entryinfo

Created: 04/27/2019 08:32
Updated: 09/07/2023 14:39
Changes: 04/27/2019 08:32 (64), 06/02/2020 18:04 (6), 09/07/2023 14:39 (4)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Might our Artificial Intelligence support you?

Check our Alexa App!