Mozilla Thunderbird up to 52.8 SMIME Message Leak information disclosure

Summaryinfo

A vulnerability identified as critical has been detected in Mozilla Thunderbird up to 52.8. Impacted is an unknown function of the component SMIME Message Handler. Performing a manipulation results in information disclosure (Leak). This vulnerability is reported as CVE-2018-12372. The attack is possible to be carried out remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Mozilla Thunderbird up to 52.8 (Mail Client Software). This affects some unknown functionality of the component SMIME Message Handler. The manipulation with an unknown input leads to a information disclosure vulnerability (Leak). CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. The summary by CVE is:

Decrypted S/MIME parts, when included in HTML crafted for an attack, can leak plaintext when included in a a HTML reply/forward. This vulnerability affects Thunderbird < 52.9.

The weakness was disclosed 10/18/2018 as Bug 1419417 as confirmed bug report (Bugzilla). The advisory is shared at bugzilla.mozilla.org. This vulnerability is uniquely identified as CVE-2018-12372 since 06/14/2018. 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. MITRE ATT&CK project uses the attack technique T1592 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 111083 (Debian DLA-1425-1 : thunderbird security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 351350 (Amazon Linux Security Advisory for thunderbird: ALAS2-2018-1061).

Upgrading to version 52.9 eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (111083) and SecurityFocus (BID 104613†). The entries VDB-120044, VDB-120045, VDB-120047 and VDB-120049 are pretty similar. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Mail Client Software

Vendor

• Mozilla

Name

• Thunderbird

Version

• 52.0
• 52.1
• 52.2
• 52.3
• 52.4
• 52.5
• 52.6
• 52.7
• 52.8

License

• open-source

Website

• Vendor: https://www.mozilla.org/

CPE 2.3info

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CPE 2.2info

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Entryinfo

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

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