Dovecot up to 2.2.33/2.3.0 SASL Auth improper authentication

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in Dovecot up to 2.2.33/2.3.0. Impacted is an unknown function of the component SASL Auth. This manipulation causes improper authentication. This vulnerability is tracked as CVE-2017-15132. The attack is possible to be carried out remotely. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in Dovecot up to 2.2.33/2.3.0 (Mail Server Software). Affected by this vulnerability is some unknown processing of the component SASL Auth. The manipulation with an unknown input leads to a improper authentication vulnerability. The CWE definition for the vulnerability is CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. As an impact it is known to affect availability. The summary by CVE is:

A flaw was found in dovecot 2.0 up to 2.2.33 and 2.3.0. An abort of SASL authentication results in a memory leak in dovecot's auth client used by login processes. The leak has impact in high performance configuration where same login processes are reused and can cause the process to crash due to memory exhaustion.

The bug was discovered 01/25/2018. The weakness was disclosed 01/25/2018 by Aleksandar Nikolic with Cisco Talos as Bug 1532768 as confirmed bug report (Bugzilla). It is possible to read the advisory at bugzilla.redhat.com. This vulnerability is known as CVE-2017-15132 since 10/08/2017. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 106426 (FreeBSD : dovecot -- abort of SASL authentication results in a memory leak (92b8b284-a3a2-41b1-956c-f9cf8b74f500)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 176313 (Debian Security Update for dovecot (DSA 4130-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 1 days after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (106426) and SecurityFocus (BID 103201†). The entries VDB-114009 and VDB-114012 are pretty similar. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Name

Version

License

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

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

NVD Base Score: 🔍

Exploitinginfo

Class: Improper authentication
CWE: CWE-287
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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Nessus ID: 106426
Nessus Name: FreeBSD : dovecot -- abort of SASL authentication results in a memory leak (92b8b284-a3a2-41b1-956c-f9cf8b74f500)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 831684
OpenVAS Name: Debian Security Advisory DSA 4130-1 (dovecot - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: github.com

Timelineinfo

10/08/2017 🔍
01/25/2018 +109 days 🔍
01/25/2018 +0 days 🔍
01/25/2018 +0 days 🔍
01/26/2018 +1 days 🔍
01/26/2018 +0 days 🔍
01/29/2018 +3 days 🔍
03/01/2018 +31 days 🔍
02/02/2023 +1799 days 🔍

Sourcesinfo

Advisory: Bug 1532768
Researcher: Aleksandar Nikolic
Organization: Cisco Talos
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-15132 (🔍)
GCVE (CVE): GCVE-0-2017-15132
GCVE (VulDB): GCVE-100-112447

OVAL: 🔍

SecurityFocus: 103201 - Dovecot CVE-2017-14461 Out-Of-Bounds Read Information Disclosure Vulnerability

See also: 🔍

Entryinfo

Created: 01/26/2018 07:58
Updated: 02/02/2023 17:44
Changes: 01/26/2018 07:58 (76), 12/27/2019 17:17 (8), 02/02/2023 17:44 (4)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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