PT-2019-4948 · Heimdal+3 · Heimdal+3

Jeffrey Altman · Published 2019-05-15 · Updated 2022-10-13 · CVE-2019-12098

Positive Technologies (AI Summary)

CVSS v2.0

8.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Heimdal versions prior to 7.6.0

Description The issue is related to the implementation of the Kerberos protocol in Heimdal, specifically with errors in cryptographic key management. This allows a remote attacker to perform a man-in-the-middle attack due to the failure to verify anonymous PKINIT PA-PKINIT-KX key exchange. The problem is located in the krb5 init creds step function in lib/krb5/init creds pw.c.

Recommendations For Heimdal versions prior to 7.6.0, update to version 7.6.0 or later to resolve the issue. As a temporary workaround, consider restricting the use of the krb5 init creds step function until a patch is available.

Fix

Improper Certificate Validation

Weakness Enumeration

CWE-320

CWE-295

Related Identifiers

BDU:2020-01565

CVE-2019-12098

DSA-4455-1

OPENSUSE-SU-2019:1682-1

OPENSUSE-SU-2019:1688-1

OPENSUSE-SU-2019:1888-1

OPENSUSE-SU-2019_1682-1

OPENSUSE-SU-2024:10946-1

USN-5675-1

Affected Products

Heimdal

Linuxmint

Suse

Ubuntu

References · 42

• https://github.com/heimdal/heimdal/commit/2f7f3d9960aa6ea21358bdf3687cee5149aa35cf · Patch
• https://github.com/heimdal/heimdal/compare/3e58559...bbafe72 · Patch
• https://ubuntu.com/security/notices/USN-5675-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-12098 · Security Note
• https://osv.dev/vulnerability/openSUSE-SU-2019:1682-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2019-12098 · Vendor Advisory
• https://osv.dev/vulnerability/DSA-4455-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-12098 · Vendor Advisory
• http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00003.html · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-3116 · Vendor Advisory
• https://bdu.fstec.ru/vul/2020-01565 · Security Note
• https://osv.dev/vulnerability/openSUSE-SU-2019:1888-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2019-12098 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2019-12098 · Security Note
• http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00026.html · Vendor Advisory