Linux-PAM up to 1.2.0 pam_unix _unix_run_helper_binary Password information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in Linux-PAM up to 1.2.0. This impacts the function _unix_run_helper_binary of the component pam_unix Module. The manipulation of the argument Password leads to information disclosure. This vulnerability is referenced as CVE-2015-3238. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux-PAM up to 1.2.0 and classified as problematic. This issue affects the function _unix_run_helper_binary of the component pam_unix Module. The manipulation of the argument Password with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality, and availability. The summary by CVE is:

The _unix_run_helper_binary function in the pam_unix module in Linux-PAM (aka pam) before 1.2.1, when unable to directly access passwords, allows local users to enumerate usernames or cause a denial of service (hang) via a large password.

The weakness was published 08/24/2015 (Website). The advisory is shared at trustwave.com. The identification of this vulnerability is CVE-2015-3238 since 04/10/2015. An attack has to be approached locally. Required for exploitation is a simple authentication. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 85516 (CentOS 6 / 7 : pam (CESA-2015:1640)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 196435 (Ubuntu Security Notification for Pam Vulnerabilities (USN-2935-1)).

Upgrading to version 1.2.1 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (85516) and SecurityFocus (BID 75428†). Similar entries are available at VDB-12800 and VDB-82667. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 4.4
VulDB Temp Score: 4.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
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: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 85516
Nessus Name: CentOS 6 / 7 : pam (CESA-2015:1640)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 14611
OpenVAS Name: Amazon Linux Local Check: ALAS-2015-589
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Linux-PAM 1.2.1

Timelineinfo

04/10/2015 🔍
06/25/2015 +76 days 🔍
08/24/2015 +60 days 🔍
08/24/2015 +0 days 🔍
08/25/2015 +1 days 🔍
06/13/2022 +2484 days 🔍

Sourcesinfo

Advisory: RHSA-2015:1640
Status: Not defined
Confirmation: 🔍

CVE: CVE-2015-3238 (🔍)
GCVE (CVE): GCVE-0-2015-3238
GCVE (VulDB): GCVE-100-77405
SecurityFocus: 75428 - Linux-PAM '_unix_run_helper_binary()' Function Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 08/25/2015 10:03
Updated: 06/13/2022 09:23
Changes: 08/25/2015 10:03 (50), 10/31/2017 08:18 (15), 06/13/2022 09:18 (3), 06/13/2022 09:23 (14)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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