CVE-2015-2694

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Summary

CVECVE-2015-2694
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2015-05-25 19:59:02 UTC
Updated2026-05-06 22:30:45 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v2.0 5.8 from [email protected]

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

Problem Types: CWE-264 | n/a

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Medium
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
None

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Mit Kerberos 5 1.12 All All All
Application Mit Kerberos 5 1.12.1 All All All
Application Mit Kerberos 5 1.12.2 All All All
Application Mit Kerberos 5 1.12.3 All All All
Application Mit Kerberos 5 1.13 All All All
Application Mit Kerberos 5 1.13.1 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
Prevent requires_preauth bypass [CVE-2015-2694] · krb5/krb5@e3b5a5e · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com Vendor Advisory
MIT Kerberos 5 OTP and PKINIT kdcpreauth Modules Multiple Security Bypass Vulnerabilities af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com
RT/krbdev.mit.edu: Ticket #8160 requires_preauth bypass in PKINIT-enabled KDC [CVE-2015-2694] af854a3a-2127-422b-91ae-364da2661108 krbdev.mit.edu Vendor Advisory
USN-2810-1: Kerberos vulnerabilities | Ubuntu af854a3a-2127-422b-91ae-364da2661108 www.ubuntu.com
Oracle Linux Bulletin - October 2015 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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