CVE-2015-2694

medium

Description

The kdcpreauth modules in MIT Kerberos 5 (aka krb5) 1.12.x and 1.13.x before 1.13.2 do not properly track whether a client's request has been validated, which allows remote attackers to bypass an intended preauthentication requirement by providing (1) zero bytes of data or (2) an arbitrary realm name, related to plugins/preauth/otp/main.c and plugins/preauth/pkinit/pkinit_srv.c.

References

http://krbdev.mit.edu/rt/Ticket/Display.html?id=8160

http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html

http://www.securityfocus.com/bid/74824

http://www.ubuntu.com/usn/USN-2810-1

https://github.com/krb5/krb5/commit/e3b5a5e5267818c97750b266df50b6a3d4649604

Details

Source: MITRE

Published: 2015-05-25

Updated: 2020-01-21

Type: CWE-264

Risk Information

CVSS v2

Base Score: 5.8

Vector: AV:N/AC:M/Au:N/C:P/I:P/A:N

Impact Score: 4.9

Exploitability Score: 8.6

Severity: MEDIUM