Enigmail up to 2.0.5 OpenPGP Signature HTML Email signature verification

CVSS Meta Temp Score
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Current Exploit Price (≈)
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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.
6.2$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in Enigmail up to 2.0.5. The affected element is an unknown function of the component OpenPGP Signature Handler. This manipulation as part of HTML Email causes signature verification. This vulnerability is handled as CVE-2018-15586. The attack can be initiated remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Enigmail up to 2.0.5. It has been declared as critical. Affected by this vulnerability is some unknown functionality of the component OpenPGP Signature Handler. The manipulation as part of a HTML Email leads to a signature verification vulnerability. The CWE definition for the vulnerability is CWE-347. The product does not verify, or incorrectly verifies, the cryptographic signature for data. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Enigmail before 2.0.6 is prone to to OpenPGP signatures being spoofed for arbitrary messages using a PGP/INLINE signature wrapped within a specially crafted multipart HTML email.

The bug was discovered 05/27/2018. The weakness was released 02/11/2019 (Website). The advisory is shared at seclists.org. This vulnerability is known as CVE-2018-15586 since 08/20/2018. The attack can be launched remotely. The exploitation doesn't need any form of authentication. 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 260 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 2.0.6 eliminates this vulnerability.

Entries connected to this vulnerability are available at VDB-130743, VDB-134133, VDB-135145 and VDB-135166. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.2

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

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Enigmail 2.0.6

Timelineinfo

05/27/2018 🔍
08/20/2018 +85 days 🔍
02/11/2019 +175 days 🔍
02/11/2019 +0 days 🔍
07/09/2023 +1609 days 🔍

Sourcesinfo

Advisory: 152703
Status: Not defined

CVE: CVE-2018-15586 (🔍)
GCVE (CVE): GCVE-0-2018-15586
GCVE (VulDB): GCVE-100-130741
See also: 🔍

Entryinfo

Created: 02/12/2019 00:06
Updated: 07/09/2023 10:47
Changes: 02/12/2019 00:06 (57), 05/09/2020 18:31 (2), 07/09/2023 10:47 (4)
Complete: 🔍
Cache ID: 216::103

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

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