CVE-2015-2694

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.

CVSS Metrics

• v2.0•MEDIUM•Score: 5.8AV:N/AC:M/Au:N/C:P/I:P/A:N

EPSS Trends

Current EPSS score: 0.89%• Percentile: 76%

Techniques & Countermeasures

• CWE-264•Permissions, Privileges, and Access Controls

  Weaknesses in this category are related to the management of permissions, privileges, and other security features that are used to perform access control.

Affected Systems

• mit•kerberos_5

  1.12 | 1.12.1 | 1.12.2 | 1.12.3 | 1.13 | 1.13.1

References (5)

• https://github.com/krb5/krb5/commit/e3b5a5e5267818c97750b266df50b6a3d4649604
• http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
• http://www.securityfocus.com/bid/74824
• http://krbdev.mit.edu/rt/Ticket/Display.html?id=8160
• http://www.ubuntu.com/usn/USN-2810-1