Vulnerability Details : CVE-2018-9275
In check_user_token in util.c in the Yubico PAM module (aka pam_yubico) 2.18 through 2.25, successful logins can leak file descriptors to the auth mapping file, which can lead to information disclosure (serial number of a device) and/or DoS (reaching the maximum number of file descriptors).
Vulnerability category: Denial of serviceInformation leak
Products affected by CVE-2018-9275
- cpe:2.3:a:yubico:yubico_pam:*:*:*:*:*:yubico:*:*
Exploit prediction scoring system (EPSS) score for CVE-2018-9275
0.19%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 57 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2018-9275
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.4
|
MEDIUM | AV:N/AC:L/Au:N/C:P/I:N/A:P |
10.0
|
4.9
|
NIST | |
|
8.2
|
HIGH | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H |
3.9
|
4.2
|
NIST |
CWE ids for CVE-2018-9275
-
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-2018-9275
-
https://github.com/Yubico/yubico-pam/issues/136
Authfile Leaking File Descriptor · Issue #136 · Yubico/yubico-pam · GitHubIssue Tracking;Third Party Advisory
-
https://github.com/Yubico/yubico-pam/commit/0f6ceabab0a8849b47f67d727aa526c2656089ba
util: make sure to close the authfile before returning success · Yubico/yubico-pam@0f6ceab · GitHubPatch
-
https://bugzilla.opensuse.org/show_bug.cgi?id=1088027
Bug 1088027 – VUL-0: CVE-2018-9275: pam_yubico: Authfile Leaking File DescriptorIssue Tracking;Third Party Advisory
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