Claws Mail up to 3.17.5 STARTTLS common/session.c Remote Code Execution

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 (≈)
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CTI Interest Score
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9.4$0-$5k0.00

Summaryinfo

A vulnerability categorized as very critical has been discovered in Claws Mail up to 3.17.5. This vulnerability affects unknown code of the file common/session.c of the component STARTTLS Handler. The manipulation results in Remote Code Execution. This vulnerability is cataloged as CVE-2020-15917. The attack may be launched remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Claws Mail up to 3.17.5 (Mail Client Software). It has been classified as very critical. Affected is an unknown functionality of the file common/session.c of the component STARTTLS Handler. The manipulation with an unknown input leads to a remote code execution vulnerability. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

common/session.c in Claws Mail before 3.17.6 has a protocol violation because suffix data after STARTTLS is mishandled.

The weakness was shared 07/23/2020. This vulnerability is traded as CVE-2020-15917 since 07/23/2020. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 07/24/2020).

Upgrading to version 3.17.6 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 9.6

VulDB Base Score: 9.8
VulDB Temp Score: 9.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
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: Remote Code Execution
CWE: Unknown
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: Claws Mail 3.17.6

Timelineinfo

07/23/2020 🔍
07/23/2020 +0 days 🔍
07/24/2020 +1 days 🔍
07/24/2020 +0 days 🔍

Sourcesinfo

Status: Not defined

CVE: CVE-2020-15917 (🔍)
GCVE (CVE): GCVE-0-2020-15917
GCVE (VulDB): GCVE-100-158964

Entryinfo

Created: 07/24/2020 09:51
Updated: 07/24/2020 09:56
Changes: 07/24/2020 09:51 (36), 07/24/2020 09:56 (17)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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