Vulnerability Details : CVE-2015-3238
Potential exploit
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.
Vulnerability category: Denial of serviceInformation leak
Products affected by CVE-2015-3238
- cpe:2.3:a:oracle:sparc-opl_service_processor:*:*:*:*:*:*:*:*
- cpe:2.3:a:linux-pam:linux-pam:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2015-3238
0.54%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 77 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2015-3238
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.8
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:N/A:P |
8.6
|
4.9
|
NIST | |
|
6.5
|
MEDIUM | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L |
3.9
|
2.5
|
NIST |
CWE ids for CVE-2015-3238
-
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.Assigned by: nvd@nist.gov (Primary)
References for CVE-2015-3238
-
http://rhn.redhat.com/errata/RHSA-2015-1640.html
RHSA-2015:1640 - Security Advisory - Red Hat Customer PortalVendor Advisory
-
http://www.openwall.com/lists/oss-security/2015/06/25/13
oss-security - Linux-PAM 1.2.1 released to address CVE-2015-3238
-
http://www.ubuntu.com/usn/USN-2935-2
USN-2935-2: PAM regression | Ubuntu security notices
-
http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.html
cpuapr2016v3
-
https://security.gentoo.org/glsa/201605-05
Linux-PAM: Multiple vulnerabilities (GLSA 201605-05) — Gentoo security
-
http://www.securityfocus.com/bid/75428
Linux-PAM '_unix_run_helper_binary()' Function Denial of Service Vulnerability
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http://lists.fedoraproject.org/pipermail/package-announce/2015-July/161350.html
[SECURITY] Fedora 21 Update: pam-1.1.8-19.fc21
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http://www.ubuntu.com/usn/USN-2935-1
USN-2935-1: PAM vulnerabilities | Ubuntu security notices
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http://lists.fedoraproject.org/pipermail/package-announce/2015-June/161249.html
[SECURITY] Fedora 22 Update: pam-1.1.8-19.fc22
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https://www.trustwave.com/Resources/Security-Advisories/Advisories/TWSL2015-011/?fid=6551
Exploit
-
https://bugzilla.redhat.com/show_bug.cgi?id=1228571
1228571 – (CVE-2015-3238) CVE-2015-3238 pam: DoS/user enumeration due to blocking pipe in pam_unix module
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http://www.ubuntu.com/usn/USN-2935-3
USN-2935-3: PAM regression | Ubuntu security notices
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https://www.trustwave.com/Resources/SpiderLabs-Blog/Username-Enumeration-against-OpenSSH-SELinux-with-CVE-2015-3238/
Username Enumeration against OpenSSH/SELinux with CVE-2015-3238 | Trustwave | SpiderLabs | TrustwaveExploit
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