CVE-2015-3238
pam: DoS/user enumeration due to blocking pipe in pam_unix module
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
2Exploited in Wild
-Decision
Descriptions
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.
Vulnerabilidad en la función _unix_run_helper_binary en el módulo pam_unix en Linux-PAM (también conocido como pam) en versiones anteriores a 1.2.1, cuando no es posible acceder directamente a las contraseñas, permite a usuarios locales enumerar los nombres de usuario o causar una denegación de servicio (colgado) a través de una contraseña larga.
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.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2015-04-10 CVE Reserved
- 2015-08-18 CVE Published
- 2024-08-06 CVE Updated
- 2024-08-06 First Exploit
- 2024-09-17 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
CWE
- CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
- CWE-203: Observable Discrepancy
CAPEC
References (14)
| URL | Tag | Source |
|---|---|---|
| http://www.openwall.com/lists/oss-security/2015/06/25/13 | Mailing List |
|
| http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.html | X_refsource_confirm |
|
| http://www.securityfocus.com/bid/75428 | Vdb Entry |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| http://lists.fedoraproject.org/pipermail/package-announce/2015-July/161350.html | 2023-02-12 | |
| http://lists.fedoraproject.org/pipermail/package-announce/2015-June/161249.html | 2023-02-12 | |
| http://rhn.redhat.com/errata/RHSA-2015-1640.html | 2023-02-12 | |
| http://www.ubuntu.com/usn/USN-2935-1 | 2023-02-12 | |
| http://www.ubuntu.com/usn/USN-2935-2 | 2023-02-12 | |
| http://www.ubuntu.com/usn/USN-2935-3 | 2023-02-12 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1228571 | 2015-08-18 | |
| https://security.gentoo.org/glsa/201605-05 | 2023-02-12 | |
| https://access.redhat.com/security/cve/CVE-2015-3238 | 2015-08-18 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Linux-pam Search vendor "Linux-pam" | Linux-pam Search vendor "Linux-pam" for product "Linux-pam" | <= 1.1.8 Search vendor "Linux-pam" for product "Linux-pam" and version " <= 1.1.8" | - |
Affected
| ||||||
| Oracle Search vendor "Oracle" | Sparc-opl Service Processor Search vendor "Oracle" for product "Sparc-opl Service Processor" | <= 1121 Search vendor "Oracle" for product "Sparc-opl Service Processor" and version " <= 1121" | - |
Affected
| ||||||