Dovecot 2.3.9.0/2.3.9.1/2.3.9.2 IMAP/LMTP denial of service

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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3.1$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Dovecot 2.3.9.0/2.3.9.1/2.3.9.2. This affects an unknown function of the component IMAP/LMTP. Performing a manipulation results in denial of service. This vulnerability is identified as CVE-2020-7957. The attack can be initiated remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Dovecot 2.3.9.0/2.3.9.1/2.3.9.2 (Mail Server Software). It has been classified as problematic. This affects an unknown functionality of the component IMAP/LMTP. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. The summary by CVE is:

The IMAP and LMTP components in Dovecot 2.3.9 before 2.3.9.3 mishandle snippet generation when many characters must be read to compute the snippet and a trailing > character exists. This causes a denial of service in which the recipient cannot read all of their messages.

The weakness was released 02/12/2020 (oss-sec). The advisory is shared at openwall.com. This vulnerability is uniquely identified as CVE-2020-7957 since 01/24/2020. The exploitability is told to be difficult. 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 T1499 for this issue.

Upgrading to version 2.3.9.3 eliminates this vulnerability.

Entry connected to this vulnerability is available at VDB-150080. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.1
VulDB Meta Temp Score: 3.1

VulDB Base Score: 3.1
VulDB Temp Score: 3.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 3.1
NVD Vector: 🔍

CNA Base Score: 3.1
CNA Vector (MITRE): 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
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: Dovecot 2.3.9.3

Timelineinfo

01/24/2020 🔍
02/12/2020 +19 days 🔍
02/13/2020 +1 days 🔍
05/10/2025 +1913 days 🔍

Sourcesinfo

Advisory: FEDORA-2020-0e6a67af5a
Status: Confirmed

CVE: CVE-2020-7957 (🔍)
GCVE (CVE): GCVE-0-2020-7957
GCVE (VulDB): GCVE-100-150081
See also: 🔍

Entryinfo

Created: 02/13/2020 08:25
Updated: 05/10/2025 19:16
Changes: 02/13/2020 08:25 (39), 02/13/2020 08:30 (12), 03/30/2024 15:52 (16), 03/30/2024 15:58 (18), 05/10/2025 19:16 (5)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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