VDB-155386 · CVE-2020-10957 · GCVE-0-2020-10957

Dovecot up to 2.3.10.0 Submission-Login Parameter null pointer dereference

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.
6.1	$0-$5k	0.03

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Dovecot up to 2.3.10.0. This issue affects some unknown processing of the component Submission-Login. The manipulation as part of Parameter leads to null pointer dereference. The identification of this vulnerability is CVE-2020-10957. The attack may be initiated remotely. There is no exploit available. It is recommended to upgrade the affected component. Once again VulDB remains the best source for vulnerability data.

Detailsinfo

A vulnerability classified as problematic was found in Dovecot up to 2.3.10.0 (Mail Server Software). This vulnerability affects an unknown function of the component Submission-Login. The manipulation as part of a Parameter leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability. CVE summarizes:

In Dovecot before 2.3.10.1, unauthenticated sending of malformed parameters to a NOOP command causes a NULL Pointer Dereference and crash in submission-login, submission, or lmtp.

The weakness was released 05/18/2020 (oss-sec). The advisory is available at openwall.com. This vulnerability was named CVE-2020-10957 since 03/25/2020. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available.

Upgrading to version 2.3.10.1 eliminates this vulnerability.

Entries connected to this vulnerability are available at VDB-155387 and VDB-155388. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Mail Server Software

Name

Dovecot

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Dovecot 2.3.10.1

Timelineinfo

03/25/2020 🔍
05/18/2020 +54 days 🔍
05/19/2020 +1 days 🔍
10/18/2020 +152 days 🔍

Sourcesinfo

Advisory: openwall.com
Status: Not defined
Confirmation: 🔍

CVE: CVE-2020-10957 (🔍)
GCVE (CVE): GCVE-0-2020-10957
GCVE (VulDB): GCVE-100-155386
See also: 🔍

Entryinfo

Created: 05/19/2020 06:45
Updated: 10/18/2020 16:52
Changes: 05/19/2020 06:45 (41), 05/19/2020 06:50 (12), 10/18/2020 16:52 (1)
Complete: 🔍
Cache ID: 216:748:103