CVE-2019-12098 Information

Description

In the client side of Heimdal before 7.6.0 failure to verify anonymous PKINIT PA-PKINIT-KX key exchange permits a man-in-the-middle attack. This issue is in krb5_init_creds_step in lib/krb5/init_creds_pw.c.

CVSS Vector

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Reference

http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00002.html http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00003.html http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00026.html http://www.h5l.org/pipermail/heimdal-announce/2019-May/000009.html https://github.com/heimdal/heimdal/commit/2f7f3d9960aa6ea21358bdf3687cee5149aa35cf https://github.com/heimdal/heimdal/compare/3e58559…bbafe72 https://github.com/heimdal/heimdal/releases/tag/heimdal-7.6.0 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GIXEDVVMPD6ZAJSMI2EZ7FNEIVNWE5PD/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SLXXIF4LOQEAEDAF4UGP2AO6WDNTDFUB/ https://seclists.org/bugtraq/2019/Jun/1 https://www.debian.org/security/2019/dsa-4455

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

NONE

Base Severity

7.4