CVE-2015-3238
"PAM Unix User Enumeration and Denial of Service Vulnerability"
Description
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.
INFO
Published Date :
Aug. 24, 2015, 2:59 p.m.
Last Modified :
Feb. 12, 2023, 11:15 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
2.5
Exploitability Score :
3.9
Public PoC/Exploit Available at Github
CVE-2015-3238 has a 1 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
Affected Products
The following products are affected by CVE-2015-3238
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2015-3238.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2015-3238 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2015-3238 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Feb. 12, 2023
Action Type Old Value New Value Changed Description It was discovered that the _unix_run_helper_binary() function of PAM's unix_pam module could write to a blocking pipe, possibly causing the function to become unresponsive. An attacker able to supply large passwords to the unix_pam module could use this flaw to enumerate valid user accounts, or cause a denial of service on the system. 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. Removed CVSS V2 Red Hat, Inc. (AV:N/AC:L/Au:N/C:P/I:N/A:P) Removed Reference https://access.redhat.com/errata/RHSA-2015:1640 [No Types Assigned] Removed Reference https://access.redhat.com/security/cve/CVE-2015-3238 [No Types Assigned] -
CVE Modified by [email protected]
Feb. 02, 2023
Action Type Old Value New Value Changed Description 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. It was discovered that the _unix_run_helper_binary() function of PAM's unix_pam module could write to a blocking pipe, possibly causing the function to become unresponsive. An attacker able to supply large passwords to the unix_pam module could use this flaw to enumerate valid user accounts, or cause a denial of service on the system. Added CVSS V2 Red Hat, Inc. (AV:N/AC:L/Au:N/C:P/I:N/A:P) Added Reference https://access.redhat.com/errata/RHSA-2015:1640 [No Types Assigned] Added Reference https://access.redhat.com/security/cve/CVE-2015-3238 [No Types Assigned] -
CPE Deprecation Remap by [email protected]
Jan. 03, 2019
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:kernel:linux-pam:*:*:*:*:*:*:*:* versions from (including) 1.2.0 OR *cpe:2.3:a:linux-pam:linux-pam:*:*:*:*:*:*:*:* versions from (including) 1.1.8 -
CVE Modified by [email protected]
Dec. 03, 2016
Action Type Old Value New Value Added Reference http://lists.fedoraproject.org/pipermail/package-announce/2015-June/161249.html [No Types Assigned] Added Reference http://www.ubuntu.com/usn/USN-2935-3 [No Types Assigned] Added Reference http://www.ubuntu.com/usn/USN-2935-1 [No Types Assigned] Added Reference http://www.ubuntu.com/usn/USN-2935-2 [No Types Assigned] Added Reference http://lists.fedoraproject.org/pipermail/package-announce/2015-July/161350.html [No Types Assigned] -
CVE Modified by [email protected]
Nov. 28, 2016
Action Type Old Value New Value Added Reference http://www.securityfocus.com/bid/75428 [No Types Assigned] -
Modified Analysis by [email protected]
Jun. 15, 2016
Action Type Old Value New Value Changed CPE Configuration Configuration 1 OR *cpe:2.3:a:oracle:sparc-opl_service_processor:1121:*:*:*:*:*:*:* (and previous) Configuration 2 OR *cpe:2.3:a:kernel:linux-pam:1.2.0:*:*:*:*:*:*:* (and previous) Configuration 1 OR *cpe:2.3:a:kernel:linux-pam:1.2.0:*:*:*:*:*:*:* (and previous) Configuration 2 OR *cpe:2.3:a:oracle:sparc-opl_service_processor:1121:*:*:*:*:*:*:* (and previous) -
CVE Modified by [email protected]
Jun. 11, 2016
Action Type Old Value New Value Added Reference https://security.gentoo.org/glsa/201605-05 -
Modified Analysis by [email protected]
Apr. 26, 2016
Action Type Old Value New Value Changed CPE Configuration Configuration 1 OR *cpe:2.3:a:kernel:linux-pam:1.2.0:*:*:*:*:*:*:* (and previous) Configuration 1 OR *cpe:2.3:a:oracle:sparc-opl_service_processor:1121:*:*:*:*:*:*:* (and previous) Configuration 2 OR *cpe:2.3:a:kernel:linux-pam:1.2.0:*:*:*:*:*:*:* (and previous) Added CVSS V3 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L -
CVE Modified by [email protected]
Apr. 22, 2016
Action Type Old Value New Value Added Reference http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.html -
Modified Analysis by [email protected]
Aug. 25, 2015
Action Type Old Value New Value Added CPE Configuration Configuration 1 OR *cpe:2.3:a:kernel:linux-pam:1.2.0:*:*:*:*:*:*:* (and previous) Added CVSS V2 (AV:N/AC:M/Au:N/C:P/I:N/A:P) Changed Reference Type http://rhn.redhat.com/errata/RHSA-2015-1640.html No Types Assigned http://rhn.redhat.com/errata/RHSA-2015-1640.html Advisory Changed Reference Type https://www.trustwave.com/Resources/SpiderLabs-Blog/Username-Enumeration-against-OpenSSH-SELinux-with-CVE-2015-3238/ No Types Assigned https://www.trustwave.com/Resources/SpiderLabs-Blog/Username-Enumeration-against-OpenSSH-SELinux-with-CVE-2015-3238/ Exploit Changed Reference Type https://www.trustwave.com/Resources/Security-Advisories/Advisories/TWSL2015-011/?fid=6551 No Types Assigned https://www.trustwave.com/Resources/Security-Advisories/Advisories/TWSL2015-011/?fid=6551 Exploit Added CWE CWE-200 -
Initial Analysis by [email protected]
Aug. 25, 2015
Action Type Old Value New Value
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2015-3238 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2015-3238
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.49 }} -0.13%
score
0.76280
percentile