NixOS up to 17.03 LDAP /etc/ldap.conf certificate validation

CVSS Meta Temp Score
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in NixOS up to 17.03. Impacted is an unknown function of the file /etc/ldap.conf of the component LDAP. The manipulation results in certificate validation. This vulnerability is known as CVE-2017-11501. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability, which was classified as critical, was found in NixOS up to 17.03. Affected is an unknown code block of the file /etc/ldap.conf of the component LDAP. The manipulation with an unknown input leads to a certificate validation vulnerability. CWE is classifying the issue as CWE-295. The product does not validate, or incorrectly validates, a certificate. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

NixOS 17.03 and earlier has an unintended default absence of SSL Certificate Validation for LDAP. The users.ldap NixOS module implements user authentication against LDAP servers via a PAM module. It was found that if TLS is enabled to connect to the LDAP server with users.ldap.useTLS, peer verification will be unconditionally disabled in /etc/ldap.conf.

The bug was discovered 07/20/2017. The weakness was published 07/20/2017 (oss-sec). The advisory is shared for download at openwall.com. This vulnerability is traded as CVE-2017-11501 since 07/20/2017. 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 MITRE ATT&CK project declares the attack technique as T1587.003.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.6
VulDB Meta Temp Score: 6.6

VulDB Base Score: 7.3
VulDB Temp Score: 7.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.9
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: Certificate validation
CWE: CWE-295 / 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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

07/20/2017 🔍
07/20/2017 +0 days 🔍
07/20/2017 +0 days 🔍
07/20/2017 +0 days 🔍
07/21/2017 +1 days 🔍
12/13/2022 +1971 days 🔍

Sourcesinfo

Advisory: 27506
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-11501 (🔍)
GCVE (CVE): GCVE-0-2017-11501
GCVE (VulDB): GCVE-100-104340

Entryinfo

Created: 07/21/2017 15:36
Updated: 12/13/2022 13:36
Changes: 07/21/2017 15:36 (54), 10/31/2019 08:25 (3), 12/13/2022 13:36 (3)
Complete: 🔍
Cache ID: 216::103

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