MitM attack in Heimdal

Published: 2019-05-16 | Updated: 2020-06-25
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2019-12098
Exploitation vector Network
Public exploit N/A
Vulnerable software
Server applications / Encryption software

Vendor Heimdal Software

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Key management errors

EUVDB-ID: #VU29242

Risk: Low


CVE-ID: CVE-2019-12098

CWE-ID: CWE-320 - Key Management Errors

Exploit availability: No


The vulnerability allows a remote attacker to perform a Man-in-the-Middle (MitM) attack.

The vulnerability exists due to Heimdal fails to verify anonymous PKINIT PA-PKINIT-KX key exchange within the krb5_init_creds_step() function in lib/krb5/init_creds_pw.c. A remote attacker can perform a MitM attack against the Heimdal client.


Install updates from vendor's website.

Vulnerable software versions

heimdal: 7.0.1 - 7.5.0

CPE2.3 External links

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?